Optical proof of a tiny companion orbiting supergiant star Betelgeuse is hard to come by. Hubble just spotted new evidence.

Particles from Earth’s atmosphere have been carried into space by solar wind and landing on the moon for billions of years, mixing into the lunar soil, according to a new study.

Scientists have performed laboratory experiments to better understand how Saturn's moon Titan can maintain its unique nitrogen-rich atmosphere. Titan is the second largest moon in our solar system and ...

Daily life increasingly depends on systems of satellites orbiting Earth. As fleets proliferate, ever greater numbers of expired units will hurtle back toward the surface. Decommissioned satellites ...

It's not entirely clear how neighboring planet Mars went from a presumably life-supporting planet to a place as dead as all others in the solar system. We do know, however, that whatever water and ...

Mars' atmosphere has been of interest to scientists for decades, especially as humanity looks to set up outposts on the Red Planet. Recently, the European Space Agency's ExoMars Trace Gas Orbiter gave ...