“In the search for life in the universe, we ask a slightly different question in this research,” said Lisa Kaltenager, an associate professor of astronomy at Cornell University’s Arts Sciences and director of Cornell’s Carl Sagan Institute. Video shared by organization.
“We ask who really could have found us? Who could have found that the earth is connecting with life from their place?”
Kaltenagar and Joshua Piper, associate professors of physics at Lehigh University, have identified more than a thousand stars like our Sun in which Earth-like planets can orbit at a distance from stars where they can support liquid water on their surface. This distance is known by astronomers as a habitable zone.
To be clear, such planets around such stars have not yet been investigated or confirmed.
And those potential planets, all within 300 light-years from Earth, could be a realistic view of Earth and life on it.
“It takes a special place for the earth to be able to see its stars, moving in front of the sun. And then once a year, if you move the earth in front of the sun with your vision, the sun will be” a little less bright, “Kalteneger said.
“And so you know that a planet orbits it. And you also know that it is at the right distance so that it can get liquid water, which is the main component for life.
“So we identified a thousand nearby stars in light00 light-years, almost all of which we can already see. Maybe there is life in the universe. Maybe they’ve already found us. What do they think?”
If life exists outside the Earth and is in our view, they can use the light of the Sun because the Earth can see our atmosphere and understand more about our planet as it moves beyond it.
“Pele Blue Dot” is the name of the iconic image that Cornell astronomer Carl Sagan suggested that NASA’s Voyager 1 probe would take 3.7 billion miles from Earth, as the probe went to the edge of the solar system. Image was taken on February 14, 1990.
The quest for life
The observation of a planet passing in front of its host star is called a transition, and is one of the main methods used by astronomers to find exoplanets using ground and space-based telescopes.
When NASA launches the James Web Space Telescope next year, it will be used to view the atmosphere of the Exoplanet using this method, and astronomers can use the data to show the atmosphere of the Exoplanet.
And NASA’s Planet-Hunting Transiting Exoplanet Survey Satellite (TCS) mission, which has been observing bright stars nearby since its launch in 2018, will begin a new phase of its mission in 2021. Earth’s orbital plane around the sun. The TESS spacecraft will inevitably turn to its side for further observation of the sky.
The list of stars compiled by the researchers, which was created from TESS’s star catalog, can be used as a target for exoplanet transit.
Eclipse Eclipse is also essentially a place where exoplanets can be found in Earth’s view because from their point of view, they could only see the Earth crossing in front of the Sun.
“Only a very small portion of the exoplanets will become randomly aligned with our line of sight so that we can see them transported,” said Marine.
The star systems that the Earth could see are different from the ones that could see signs of life on our planet when life began on our planet – as well as the star systems that could see the Earth in the future, the researchers wrote. In their paper.
“If we find a planet with a vibrant biosphere, we’ll be curious about whether anyone out there is keeping an eye on us.” “If we’re looking for intelligent life in the universe, it can find us and get in touch. We’ve just created a star map where we should look first.”
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