A new class of ‘Hycean’ planets may have just expanded the definition of habitability.
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.
Scientists discovered tectonic motion on our sister planet in observations from a spacecraft that died there decades ago.
Lisa Kaltenegger, director of the Carl Sagan Institute at Cornell, talks exoplanets, telescopes, and first contact.
Worlds orbiting small red dwarf stars might be less vulnerable to damaging space weather, which could boost the odds that they host life.
"We are so focused on finding a mirror image of Earth that we may overlook a planet that is even more well suited for life,” said the lead author of a new study.
At a time when many people are stuck at home, Planet Patrol provides a “community pursuing the common goal of understanding the universe and our place in it,” according to the project leader.
The detection of phosphine is “not robust evidence for life” on Venus, scientists say, but a biological origin for the signature has not been ruled out yet.
An international team of astronomers snapped this photo of a young star and its two gigantic planets from a distance of 300 light years.
“The next intriguing question would be whether life survived the star’s death or started all over again—a second genesis.”
What looked like a Jupiter-sized planet a decade ago was actually the fallout of a cataclysmic space crash.