In research aiming to understand how life might develop, scientists realized new life would commonly die out due to runaway heating or cooling on their fledgling planets.
Failure to find active microbes in coldest Antarctic soils has implications for the search for life on Mars.
The gravitational tug on outer solar system objects indicates this giant world -- if it exists -- would be 5,000 times more massive than Pluto and take up to 20,000 years to orbit the Sun.
This type of galaxy represents a special and rare class in the nearby universe, and it is believed to host stellar explosions or winds strong enough to eject ionizing photons.
Astronomers assume that this possible “intermediate mass” black hole is a key to understanding the birth of supermassive black holes located in the centers of galaxies.
In this far-off galaxy, a ravenous black hole is devouring galactic grub. Its feeding frenzy produces so much energy, it stirs up gas across its entire galaxy.
Researchers have discovered the brightest supernova ever seen, and the unusual object powering it could challenge what physicists know about dying stars.
Although water vapor is the main gas seen flowing from Comet 67P/Churyumov–Gerasimenko, very few examples of exposed water ice have been found on the surface.
Kupalo Crater has bright material exposed on its rim, which could be salts, and its flat floor likely formed from impact melt and debris.