Comments were discovered by Sean Raymond , an astrophysicist in France . He says internal heat of rogue planets could allow liquid water to flow . Writing in Aeon , he also says a thick atmosphere could help life develop . scientists have found 50 of these rogue planets in the past 15 years .
Comments were made by Sean Raymond , an astrophysicist in France . He says internal heat of rogue planets could allow liquid water to form . Writing in Aeon , he also says a thick atmosphere may help life develop . Astronomers have found 50 of these rogue planets in the past 15 years .