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29 Habitable Alien Worlds Could Detect Life on Earth, Scientists Estimate

67 Read — 27 June 2021 15:45
29 Habitable Alien Worlds Could Detect Life on Earth, Scientists Estimate

29 Habitable Alien Worlds Could Detect Life on Earth, Scientists Estimate

Scientists analyzed how many planets in other solar systems could detect Earth both 5,000 years into the past and 5,000 years into the future.

Astronomers has discovered thousands of planets outside of our solar system over the past few decades, revealing a multitude of captivating worlds within our galaxy. This golden age of exoplanet discovery raises an alluring question: If we can spot worlds orbiting stars from Earth, could speculative alien civilizations spot Earth from their own vantage points?

Most exoplanets are discovered as they pass in front of their host star from our perspective, causing a very slight dip in stellar brightness that can be detected by telescopes on Earth. This technique, known as the transit method, has enabled scientists to spot and even characterize basic details about these worlds, including whether they might be potentially habitable.

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