Every breath a person takes draws from a gas mixture that has barely shifted in recorded history: roughly 78 percent nitrogen ...

If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

Researchers have developed the Smaller Than Earth Habitability Model (STEHM) to assess which planets can maintain ...

Earth was mostly devoid of oxygen for much of its 4.5 billion year lifetime. That is, until certain processes started to ...

That would have enabled more of this organic carbon—and carbonate accumulating in shallow water around Columbia—to be ...

The finding offers fresh insight into our solar system’s farthest, coldest objects in a region known as the Kuiper Belt.

Worlds this small and distant are thought to be too cold and have too little surface gravity to hold onto gases. But the ...

Saturn's moon Titan belongs to a very select club within the solar system. It is one of only four "terrestrial" planets or moons—those with solid bodies, as opposed to those made largely of gas, like ...

Our atmosphere is about 78% nitrogen and 21% oxygen, with traces of other things like water and carbon dioxide. It's an odd mix compared to the atmospheres of other planets. Jupiter and Saturn are ...