Some exoplanets show what is happening on Earth

Lisa Kaltenegger, assistant professor of astronomy at the College of Arts and Sciences and director of the Karl Cornell Institute

Sagana, as well as Joshua Pepper, associate professor of physics atLehigh University has jointly identified 1004 stars similar to our Sun that may contain Earth-like planets in their own habitat. They are all about 300 light-years from Earth.

But what star systems can detect Earth? The ecliptic of the Earth can answer this question. This is the plane of the Earth's orbit around the Sun. The ecliptic is where the exoplanets that see the Earth will be located as they will be where the Earth crosses its own Sun. So from exoplanets a view of our planet will open.

Pepper and Kaltenegger created a list of thousands of nearby stars using the NASA Transiting Exoplanet Survey Satellite (TESS) star catalog.

Only a very small fraction of exoplanets by accidentwill be aligned with our line of sight. But all the thousands of stars that we identified in our article as being in the vicinity of the Sun could see our Earth passing by the Sun.

Joshua Pepper, assistant professor of physics at Lehigh University

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