This is an artist's concept of the "hot Jupiter" class planet, HAT-P-7b. This planet orbits a star that is much hotter than our Sun. Credit: NASA; ESA; G. Bacon, STScI If life does exist anywhere else in the universe, it may only be fleeting. Now scientists are researching how signs of life might look on dying planets.
Astronomers have discovered hundreds of distant alien planets in the past two decades. Future missions could detect potential signs of life called biosignatures on those worlds, such as oxygen or methane in their atmospheres.