The CSIRO radio telescope maps three million galaxies in a Southern Sky Survey record. An Australian radio telescope has conducted an unprecedented survey of the southern sky, mapping three million galaxies, including nearly a million never before seen, in just two weeks.

Key points:

ASKAP, consisting of 36 satellite dishes, is a radio telescope designed for rapid surveys of large parts of the sky. The test, an ASKAP rapid continuous survey, was a “census” of the universe that astronomers would use to explore the unknown. Millions of star-shaped points on the resulting map are distant galaxies, some of which have never been seen before.

This is the first time that CSIRO’s Australian Square Kilometer Array Pathfinder (ASKAP), a radio telescope located about 370 kilometers northeast of Geraldton in Western Australia, has been thoroughly tested, and the results have been considered a game changer for astronomers.

The Rapid ASKAP Continuum Survey (RACS) has created a “Google Map” of the universe from 903 radio images in 300 hours. In the past, similar surveys have taken years to complete. CSIRO astronomer and lead author David McConnell said this is an important milestone for the radio telescope and the scientific community.

The fact that this was done quickly is quite significant. It’s a game changer, he said. This means that we can go back and do it again without much effort, and it gives astronomers a chance to see things that have changed. Most things are the same from year to year, but some things change dramatically.

They often turn out to be quite fascinating: black hole mergers or periodic explosions of stars. The survey was designed to test the telescope system and ensure that it can meet the high-throughput processing requirements for the square kilometer array of the future.

Star census

Housed within the quiet radio Murchison Radio Astronomy Observatory (MRO), ASKAP’s wide field of view, generated by 36 satellite dishes and a CSIRO-designed receiver, allows you to take extremely detailed panoramic photos of the sky and detect dim light from afar . .It allows. outside.

Six dish-shaped antennas are placed on red sand between green bushes, pointing to a cloudy blue sky. Astronomers will use the data to discover how galaxies form stars and interact with each other and with supermassive black holes. (Supply: CSIRO). While in the survey, each part of the sky was observed in just 15 minutes.

The final images reveal twice the level of detail compared to previous survey results. Each of the 903 images contained between 2,000 and 4,000 objects, and the study covered 83 percent of the sky. Dr. McConnell described the final image as a “census” of the universe, which includes the remains of exploded stars, pulsars, and nearby planets.

He said the data would be used by astronomers around the world to uncover the mysteries of the universe. They are already looking at images, particularly of stars in our own galaxy that may be active, he said. The Sun, our own star, periodically emits bursts of radio emissions that can interfere with our own terrestrial radio communications.

They have found dozens of bright exotic stars with enormous bursts of energy, and observing them helps us understand the physics of these types of stars. ASKAP surveyed the entire visible sky from the Murchison Radio Astronomy Observatory in the Western Australia region. (Supply: CSIRO).

The 13.5 exabytes of raw data generated by the telescope were processed and reconstructed using CSIRO’s custom ASKAPsoft software at the Pawsey Supercomputing Center in Kensington, Western Australia. Dr McConnell said looking at the images was “fascinating” for the time.

Usually you have to wait a long time to see another image of the sky, but they come out one after another, he said. It is spectacular to see all these sources with their strange shapes, mind-boggling even for an astronomer who is used to wondering how big the universe is.

No signs of intelligent life

While no extraterrestrial life was detected during the survey, occasional stars with unusual radio emission activity were detected. Dr. McConnell said the team does not expect any evidence of aliens with binoculars, but nothing has been ruled out. I would be very surprised, he said.

When we see an object that changes its radio power, there is a small chance that it is not naturally occurring radiation, which may be an outlet for some form of intelligent life. I won’t rule anything out, but I have to keep it most likely.

The CSIRO radio telescope maps
The CSIRO radio telescope maps

ASKAP Radio Telescope Maps of approximately three million galaxies. Astronomers using CSIRO’s Australian Square Kilometer Array Finder (ASKAP) have mapped around 3,000,000 galaxies in the observable universe. ASKAP conducted its first survey of the entire southern sky with record speed and detail, creating a new atlas of the universe. Image courtesy: The CSIRO ASKAP radio telescope was designed as a survey instrument capable of quickly viewing the entire accessible sky.

ASKAP Radio Telescope Maps

It is located at the Murchison Radio Astronomy Observatory (MRO) in Western Australia and is operated by the Commonwealth Scientific and Industrial Research Organization (CSIRO). The ASKAP 36 is a 12m main focus antenna array. Each phased array is equipped with feeders that allow the simultaneous digital formation of 36 dual polarization beams.

CSIRO Executive Director Dr. Larry Marshall said: ASKAP is applying new techniques to science and technology to equip centuries-old questions about the mysteries of the universe. As well as to equip astronomers around the world with new successes. “This is enabled by innovative receivers developed by CSIRO using phase-powered technology.

Which sees ASKAP generating more raw data at a faster rate than all of Australia’s internet traffic.” Using the ASKAP telescope, CSIRO astronomer David McConnell of the Rapid ASKAP Continuum Survey (RACS) and his colleagues viewed 83% of the entire sky. Their result shows that a study of the entire sky can be done in weeks rather than years, opening up new opportunities for discovery.

The new data will allow astronomers to perform statistical analyzes of large populations of galaxies, in the same way that social researchers use information from a national census. Dr. McConnell said: This census of the universe will be used by astronomers around the world. To discover how galaxies and their supermassive black holes evolve and interact, starting with the formation of stars. With ASKAP’s advanced receivers.

The RACS team only needed to combine 903 images to create a complete map of the sky, from the tens of thousands of images required for the first radio surveys of the entire sky conducted by the main telescopes of the world. It was pretty low. The 13.5 exabytes of raw data generated by the radio telescope were processed using hardware and software custom built by CSIRO. The final 903 images and supporting information amount to 26 terabytes of data.

We hope to find millions of new galaxies in future studies, Dr. McConnell said. The team’s results were published in the publications of the Astronomical Society of Australia. The CSIRO radio telescope mapped three million galaxies in the record-breaking Southern Sky Survey. The dish-shaped antennas point to a sky filled with stars and location markers, which connect to magnified images of objects in space.

ASKAP’s first survey mapped radio-emitting objects such as galaxies, supernova remnants, and the planet. An Australian radio telescope conducted an unprecedented survey of the southern sky, mapping three million galaxies, including nearly a million never before seen, in just two weeks.

ASKAP, consisting of 36 satellite dishes, is a radio telescope designed to quickly survey large parts of the sky. The test, the Rapid ASKAP Continuum Survey, was a ‘census’ of the universe that will be used by astronomers to detect the unknown. Most of the millions of stars in the resulting map are distant galaxies.

SOME HAVE NEVER BEEN SEEN BEFORE – THIS IS THE FIRST TIME CSIRO HAS BEEN FULLY TESTED BY THE AUSTRALIAN SQUARE KILOMETER AARETH PATHFINDER (ASKAP).

A radio telescope located about 370 kilometers northeast of Geraldon in Western Australia. And the results considered are a game changer for astronomers. The Rapid ASKAP Continuum Survey (RACS) has created a “Google Map” of the Universe from 903 radio images in 300 hours. In the past, similar surveys took years to complete.

CSIRO astronomer and lead author David McConnell said it is an important milestone for the radio telescope and the scientific community. The fact that it is done quickly is very important. It is a game changer, he said. This means that we can go back and do it again without much effort, and this gives astronomers the opportunity to look for things that have changed.

Most things happen in the same year after year, but some things change dramatically. They often get quite alien: black holes merge or explode stars episodically. The survey was designed to test the telescope’s systems and ensure that it could meet high-throughput processing requirements for future sets of square kilometers.

Galaxies form stars

‘Census of Stars’ – Located within the radio-silent Murchison Radio Astronomy Observatory (MRO), the vast area of ASKAP, created by 36 CSIRO-designed satellite dishes and receivers, provides highly detailed panoramic images of the sky. Lets be taken quickly.

And it detects a dim light from far away. Six dish-shaped antennas are placed on the red sand between the green bushes, pointing to the blue sky. Astronomers will use the data to discover how galaxies form stars and interact with each other and with supermassive black holes.

While only 15 minutes in the survey were spent looking at each part of the sky, the final images show twice the level of detail compared to the results of the previous survey. Each of the 903 images consists of 2,000 to 4,000 objects, and the survey covers 83 percent of the sky. Dr. McConnell described the final image as a “census” of the universe, which included exploding stars, pulsars, and the remnants of nearby planets.

He said the data would be used by astronomers around the world to uncover the mysteries of the universe. They are already looking for images of stars in our galaxy, which may be active, he said. The sun, our own star, has periodically exploded radio emissions that could interfere with our own terrestrial radio communications. They have found several dozen extraterrestrial stars.

Which have an excessive burst of energy … and looking at them helps us understand what the physics of these types of stars is. ASKAP surveyed the entire visible sky from the Murchison Radio Astronomy Observatory in Western Australia. (Assumption: CSIRO).

The 13.5 exabytes of raw data generated by the telescope were processed and recreated using CSIRO’s custom ASKAPsoft software at the Pavsey Supercomputing Center in Kensington, Western Australia. “It’s great to see all these sources in their strange shapes, even for an astronomer who is used to thinking about how big the universe is.”

Galaxies with new telescopes

Although no extraterrestrial life was detected during the study, occasional stars with unusual radio emission activity were detected. Dr. McConnell said the team is not expected to find any evidence of aliens with binoculars, but nothing has been ruled out. When we see some type of object that changes its radio power, there is the slightest possibility that it is not natural radiation, that it can be produced by some intelligent lifestyle.

Australian scientists map millions of galaxies with new telescopes. Some telescopic antennas in the Western Australian desert. Screenshot. The new telescope has already mapped a million new galaxies. Australian scientists say they have mapped a million new galaxies using advanced telescopes in the desert.

CSIRO, the National Science Agency, said its new telescope had created “a new atlas of the universe” in record time, showing unprecedented expansion. The study said it mapped a total of three million galaxies, with images revealing twice the level of detail of previous studies. Astronomers hope the images will make new discoveries about the universe.

CSIRO stated that the mapping took only 300 hours, while all previous studies of the sky took years. With publicly available data, scientists around the world “will be able to study everything from star formation to the evolution and interaction of galaxies and their supermassive black holes,” said lead author Dr. David McConnell. said.

Enigma radio explodes dead stars: ‘Blob’ hides long-lasting remains of Star Blast “We hope that millions of new galaxies will be found in future studies,” he said. Preliminary results were published in the publications of the Astronomical Society of Australia on Tuesday. What is this telescope? The Australian Square Kilometer Array Pathfinder (ASKAP) is a collection of 36 satellite dishes that work together to take a panoramic view of the sky.

The system is located in the remote interior of Western Australia in the southern hemisphere. It spans an area of 6 km (3.7 miles) at CSIRO’s Murchison Observatory, about 700 km north of Perth. Askap telescopic antennas in Western Australia. Caption. The Askop telescope has a collection of dishes in the Western Australian desert. CSCRO stated that by combining signals from smaller dishes.

The telescope produces high-resolution images at a fraction of the cost of a much larger dish. Huge amounts of data, generated at a rapid rate, compared to all Australia’s internet traffic, is then sent to the supercomputer processing facility in Perth to create images.

What have you found?

Askap conducted its first survey of the sky this year, covering 83% of the sky and covering three million galaxies. Australia started the National Space Agency. The map was stitched using only 903 highly detailed images. Previous studies required tens of thousands to complete an image of the sky.

Astronomers said the depth and scale were exciting because by cataloging millions of galaxies beyond the Milky Way, they could perform scientific analysis. These can help to understand how the universe evolved and is structured.

The Moon will help us teach us about the existence of deep space. The Askap telescope is one of the pioneers of an international project to build the world’s largest radio telescope, the Square Kilometer Array, which will be located in South Africa and Australia.

NASA's Mars 2020 Perseverance Rover
NASA's Mars 2020 Perseverance Rover

NASA’s Mars 2020 Perseverance Rover, as seen billions of years ago on Mars. Researchers have developed hydrogen and oxygen harvesting systems for use on Mars. The active Martian water cycle, that is, the presence of shallow water and soluble perchlorate salts in Martian soil, enables the production of life-sustaining oxygen and hydrogen fluoride on Mars through the electrolysis of brine perchlorate.

NASA’s Mars 2020 Perseverance Rover

A team of scientists at Washington University in St. Louis has demonstrated temperatures of minus 36 degrees Celsius (minus 32.8 degrees Fahrenheit) to produce ultra-ordered hydrogen and oxygen from liquid Martian brine. This illustration shows the Jazero crater landing site, NASA’s Mars 2020 Perseverance Rover, as seen billions of years ago on Mars, when it was a lake. Image Credit: NASA / JPL-Caltech

“Our Martian brine electrolyzer has changed the logistics algorithm for missions to Mars and beyond,” said Professor Vijay Ramani, a researcher at the Center for Solar Energy and Energy Storage at Washington University in St. Louis. This technology is equally useful on Earth, where it opens up the seas as a viable source of oxygen and fuel. NASA’s Persistence Rover is now the route to Mars, with devices that will use high-temperature electrolysis.

However, the Mars Oxygen In Situ Resource Utilization Experiment (MOXIE) will only produce oxygen, from carbon dioxide in the air. The electrolyzer developed by Professor Ramani and his colleagues can produce 25 times more oxygen than MOXIE. It also produces hydrogen. Which can be used as fuel for the astronauts’ journey home.

Our new brine electrolyzer includes a lead ruthenate pyrochlorine anode developed by our team with platinum on the carbon cathode, said Professor Ramani. These carefully engineered components have been combined with optimal use of traditional electrochemical engineering principles, leading to this high performance.

The careful design and unique anode allow the equipment’s electrolyzer to function without the need to heat or purify the water source. Paradoxically, the filtrate dissolved in water, the so-called impurities, actually helps the Mars-like environments, said Dr. Srihari Sankarasubramanian, Center for Solar Energy and Energy and Energy Storage, said an environmental researcher and Chemical Engineering at Washington University in St. Louis.

They prevent the water from freezing and improve the performance of the electroistor system by reducing electrical resistance. Typically, water electrolyzers use high-purity deionized water, which increases the cost of the system. A system that can run on salt or suboptimal water, as the technology demonstrated by the team. And can vastly improve the economic value proposition of water electrolyzers everywhere, even on Earth.

National Academy of Sciences

“Demonstrating these electrolyzers on demand, we have intended to deploy them in very high conditions on Earth, in Martinique conditions, to use salt water or salt water food to produce hydrogen or oxygen. For example, through the electrolysis of seawater “postdoctoral researcher at the Department of Energy, Environment and Chemical Engineering at Washington University in St. Louis.

The team’s work was published in the Proceedings of the National Academy of Sciences. Plasma technology may be the key to generating oxygen supplies on Mars. A study published in the journal Plasma Sources Science and Technology argues that Mars, with its 96% carbon dioxide (CO2) atmosphere, is an almost ideal condition for the decomposition of CO2 by non-thermal (not equilibrium) plasmas.

Artist’s concept of a colony on Mars. Image courtesy: NASA Mars has resources that can be used for a sustainable settlement. In particular, the local production of oxygen on the planet can help solve the problems of making fuel to return to Earth and create a breathable environment for future outposts.

In fact, the main component of the Martian atmosphere is CO2 (95.9%), with small percentages of argon (1.9%), nitrogen (1.9%) and other gases. CO2 can be converted to oxygen and carbon monoxide (CO). “Sending manned missions to Mars is one of the important next steps in our exploration of space.

However, creating a breathing environment is a great challenge, ”said study lead author Dr. Vasco Guerra told the University of Lisbon in Portugal. “The improvement of CO2 plasma on Earth is a growing field of research, driven by climate change and solar fuel production problems.” Low temperature plasma is one of the best media for CO2 electron decomposition.

Which occurs by direct impact of electrons and transferring electron energy to vibratory excitation. Mars is well positioned for In-Situ Resource Utilization (ISRU) by plasma. In addition to its CO2 atmosphere. The surrounding cold atmosphere (on average about 210 Kelvin) can produce a stronger vibratory effect than Earth’s.

Low atmospheric temperatures also serve to slow down the reaction, allowing additional time for the molecules to separate. The low-temperature plasma decomposition method provides a twofold solution for a manned mission to Mars,” Dr. Guerra said. “This will not only provide a stable and reliable supply of oxygen. But also as a fuel source, CO has been proposed to be used as a propellant mixture in rocket vehicles.”

Sources Science and Technology

This ISRU approach can help greatly simplify the logistics of a mission to Mars. “This allows for greater self-sufficiency, reduces risk to the crew, and reduces costs by requiring fewer vehicles to complete the mission.” March has a mission to thank herself, Plessen Technology. Plasma technology may be the key to creating a sustainable oxygen supply on Mars, a new study has found.

This suggests that Mars, with its 96 percent carbon dioxide atmosphere, is an almost ideal condition for producing oxygen from CO2 through a process known as dissolution. Published in the journal Plasma Sources Science and Technology, an investigation by the Universities of Lisbon and Porto and the Ecole Polytechnic of Paris shows that the range of pressures and temperatures in the Martian atmosphere means non-thermal (or non-equilateral) plasma.

Oxygen and carbon

It is used to produce oxygen efficiently. The lead author from the University of Lisbon, Drs. Vasco Guerra said: “Sending manned missions to Mars is one of the important next steps in our exploration of space. However, creating a breathing atmosphere is a great challenge. Improving CO2 plasma on Earth is a growing field of research, driven by climate change and solar fuel production problems. Low temperature plasma is one of the best means of decomposing CO2: oxygen and carbon.

Division of the molecule into monoxide: by direct impact of electrons and transferring energy from electrons to vibratory energy. Mars has excellent conditions for in situ resource utilization (ISRU) by plasma. In addition to its CO2 atmosphere, the atmosphere surrounding the cold (around 210 Kelvin on average) can produce a much stronger vibratory effect than Earth’s. Low atmospheric temperatures also serve to slow down the reaction, allowing additional time for the molecules to separate.

Dr. Guerra said: The low temperature plasma decomposition method provides a twofold solution for manned missions to Mars. It will provide not only a stable and reliable supply of oxygen, but also as a source of fuel, as well as carbon monoxide. The rocket has been proposed to be used as a propellant mixture in vehicles. This ISRU approach can help greatly simplify the logistics of a mission to Mars. This will reduce costs by increasing self-sufficiency, reducing risk to the crew, and requiring fewer vehicles to complete the mission.

The CSIRO radio telescope maps
The Rapid ASKAP Continuum Survey

The CSIRO radio telescope maps three million galaxies in the Southern Sky Survey record. An Australian radio telescope has conducted an unprecedented survey of the southern sky, mapping three million galaxies in just two weeks, including nearly a million never-before-seen galaxies. ASKAP, consisting of 36 satellite dishes, is a radio telescope designed for rapid surveys of large parts of the sky.

The Rapid ASKAP Continuum Survey

The test, a continuous ASKAP rapid survey, was a “census” of the universe that astronomers would use to explore the unknown. Millions of star-shaped points on the resulting map are distant galaxies, some of which have never been seen before.

This is the first time that CSIRO’s Australian Square Kilometer Array Pathfinder (ASKAP), a radio telescope located about 370 kilometers northeast of Geraldton in Western Australia, has been thoroughly tested and the results were hailed as a game changer for scientists. astronomers.

The Rapid ASKAP Continuum Survey (RACS) has created a “Google Map” of the universe from 903 radio images in 300 hours. In the past, similar surveys have taken years to complete. CSIRO astronomer and lead author David McConnell said this is an important milestone for the radio telescope and the scientific community.

The fact that this was done quickly is quite significant. It’s a game changer, he said. This means that we can go back and do it again without much effort, and it gives astronomers a chance to see things that have changed. Most things are the same from year to year, but some things change dramatically.

The Rapid ASKAP Continuum Survey

Black hole mergers or periodic star explosions. The survey was designed to test the telescope system and ensure that it could meet the high-throughput processing requirements for a future square kilometer array.

Housed within the quiet Radio Murchison Radio Astronomy Observatory (MRO), ASKAP’s wide field of view, generated by 36 satellite dishes and a CSIRO-designed receiver, allows you to take extremely detailed panoramic photos of the sky and detect dim light from afar.

Six dish-shaped antennas are perched on red sand between green bushes, pointing to a cloudy blue sky. Astronomers will use the data to discover how galaxies form stars and interact with each other and with supermassive black holes. (Supply: CSIRO). While in the survey, each part of the sky was seen in just 15 minutes.

The final images reveal twice the level of detail compared to previous survey results. Each of the 903 images contained between 2,000 and 4,000 objects, and the study covered 83 percent of the sky. Dr. McConnell described the final image as a “census” of the universe, which includes the remains of exploded stars, pulsars, and nearby planets.

He said the data would be used by astronomers around the world to uncover the mysteries of the universe. They are already looking at images, particularly of stars in our own galaxy that may be active, he said. The Sun, our own star, periodically emits radio emissions that can interfere with our own terrestrial radio communications.

They have discovered dozens of bright exotic stars with enormous bursts of energy, and observing them helps us understand the physics of these types of stars. ASKAP surveyed the entire visible sky from the Murchison Radio Astronomy Observatory in the Western Australia region.

The 13.5 exabytes of raw data generated by the telescope were processed and reconstructed using CSIRO’s custom ASKAPsoft software at the Pawsey Supercomputing Center in Kensington, Western Australia. Dr McConnell said looking at the images was “fascinating” for the time.

He said that normally you have to wait a long time to see another image of the sky, but they come out one after another. It is spectacular to see all these sources with their strange shapes, mind blowing even for an astronomer who is used to wondering! Although no extraterrestrial life was found during the study, stars with unusual radio emission activity were occasionally detected.

Dr. McConnell said the team did not expect any evidence of aliens from the telescope, but nothing has been ruled out. I would be very surprised, he said. When we see an object changing its radio power, there is little chance that it is not naturally occurring radiation, which could be an outlet for intelligent life of some kind. I won’t deny anything, but most likely I will have to put up with it.

ESA’s Gaia mission

Analysis Consortium released the most detailed list of stars. ESA’s Gaia mission publishes data on more than 1.8 billion stars. Astronomers from the Gaia Data Processing and Analysis Consortium released the most detailed list of stars in the Milky Way today. The new dataset, called Gaia Early Data Release 3 (EDR3), contains detailed information (stellar position, velocity, brightness and color) on more than 1.8 billion sources known to ESA’s Gaia satellite.

This represents an increase of more than 100 million sources over the previous data release, which was made public in April 2018. More than 1.8 billion data stars have been used to create this map of the entire sky. It shows the full brightness and color of the stars seen by ESA’s Gaia satellite and has been released as part of Gaia’s Early Data Release 3.

The bright regions represent the density of bright stars, while the darkest regions correspond to patches of sky where fewer and faster stars are seen. The color of the image is obtained by combining the total amount of light with the amount of blue and red light recorded by Gaia in each part of the sky.

The bright horizontal structure dominating the image is the plane of our Milky Way. It is actually a flattened disk saw edge that contains most of the stars in the Galaxy. In the middle of the image, the galactic center appears bright and full of stars. The darkest regions of the galactic plane correspond to precursor clouds of interstellar gas and dust.

Which absorb light from more distant stars. Many of these clouds hide the stellar nursery where new generation stars are currently being born. There are many circular and open clusters scattered throughout the image, as well as our own entire galaxies. The two bright objects in the lower right of the image are the Large and Small Magellanic Clouds, two dwarf galaxies that orbit the Milky Way.

Gravitational forces between the Earth & the Sun

Launched on December 19, 2013, Gaia operates in an orbit around the so-called Lagrange point 2 (L2) located 1.5 million kilometers behind the Earth in a direction away from the Sun. At L2, the gravitational forces between the Earth and the Sun are balanced, so the spacecraft remains in a stable state, making farsighted scenes essentially without the sky.

Gaia’s main goal is to measure stellar distances using the parallax method. In this case, astronomers use the observatory to continuously scan the sky and measure the apparent change in the position of the stars over time, resulting in the movement of the Earth around the Sun. Knowing that their distances can be calculate by small changes in the position of the stars.

Gaia tracks the changing brightness and position of stars over time in its line of sight (its so-called proper speed), and by dividing their light into spectra, it measures how fast they are moving towards or away from the sun and evaluate the chemical composition. Equipped with 106 CCDs, equivalent to a camera with a resolution of one billion pixels, Gaia examines 50 million stars per day, completing ten measurements at a time. Representing a total of 500 million data points per day.

Future of our galaxy

Gaia measures distances of hundreds of millions of objects that are thousands of light years away, with an accuracy equivalent to measuring hair thickness over 2,000 km, said UK Gaia DPAC project manager Dr. Floor said van Leeuwen, an astronomer at the Institute of Astronomy at the University of Cambridge. These data are one of the pillars of astrophysics, allowing us to analyze our stellar neighborhood and address important questions about the origin and future of our galaxy.

The previous two launches, Gaia DR1 and Gaia DR2, featured positions of 1.6 billion stars. The Gaia EDR3 launch brings the total down to 2 billion stars. The status of which is significantly more accurate than previous figures. This is the first two-part release; A full Gia DR3 release is planned for 2022. The new promise of Gaia data is a treasury fund for astronomers, said Gaia project associate scientist Dr. José de Bruijnen, ESA astronomer said.

The new data includes exceptionally accurate measurements of 331,312 objects, about 92% of the stars within 100 parsecs (326 light years) of the Sun. The last census of the solar neighborhood, called the Gliese Catalog of Nearby Stars, was conducted in 1957. It initially had only 915 objects, but in 1991 it was updated to 3,803 celestial objects. It was also limited to a distance of 82 light years: the census of Gaia reaches four times as many and has 100 times as many stars.

It also provides location, speed, and brightness measurements that are orders of magnitude more accurate than older data. The researchers also confirmed that the solar system is accelerating its orbit around the galaxy. Using the observed targets of extremely distant galaxies, the velocity of our solar system has been measured to change every second at 0.23 nm / sec.

History of optical astronomy

Due to this small acceleration, the path of the solar system deviates by the diameter of one atom per second, adding up to about 115 km in a year. The acceleration measured by Gaia shows good agreement with theoretical expectations and provides the first measure of the curvature of the solar system’s orbit around the galaxy in the history of optical astronomy.

The team also sees evidence of the Milky Way’s past by looking at the stars in the direction of the galaxy’s ‘anticenter’. It is exactly in the opposite direction from the center of the galaxy to the sky. Computer models hypothesized that the Milky Way’s disk would enlarge over time as new stars were born. The new data allows scientists to see remnants of 10-billion-year-old ancient disks and thus establish a range smaller than the current size of the Milky Way disk.

The data from these peripheral regions also reinforce the evidence for another major event in the Galaxy’s more recent times. The data shows that the outer regions of the disk have a slow-moving wire component above the plane of our galaxy moving down toward the plane, and a fast-moving wire component below the plane above. In direction to

Astronomer at the University of Barcelona

This extraordinary pattern was not anticipated before. This may be the result of a near-collision between the Milky Way and the Sagittarius dwarf galaxy that occurred in our galaxy’s recent past. Disc stars have different movement patterns than we used to believe, said Dr. Teresa Antoja, an astronomer at the University of Barcelona.

“Although the role of the Sagittarius dwarf galaxy is still debated in some quarters, it may be a good candidate for all of these disturbances, as some simulations by other authors show.” The new Gaia data also reconstructs the Milky Way’s two largest companion galaxies. The Small and Large Magellanic Clouds, allowing astronomers to see their different stellar populations.

After measuring the motion of the stars in the large Magellanic cloud more precisely than before, the team clearly shows that the galaxy has a spiral structure. The data also resolves a stream of stars that are being ejected from the small Magellanic cloud, and hints at previously undiscovered structures on the outskirts of both galaxies. Gaia EDR3 is the result of a great effort on the part of everyone involved in the Gaia mission, said Gaia project scientist Dr. Timo Priesti, ESA astronomer said.

This is an exceptionally rich data set, and I look forward to the many discoveries that astronomers around the world will make with this resource and we haven’t done it yet and more great data will follow as Gaia continues to measure from orbit. These attractive results come from a set of documents that demonstrate the quality of the EDR3 version.

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