Space does not begin at a clean edge where Earth’s air abruptly stops. The atmosphere thins continuously, molecule by molecule, until its outermost hydrogen becomes almost indistinguishable from the ...

The moon's surface may be more than just a dusty, barren landscape. Over billions of years, tiny particles from Earth's atmosphere have landed in the lunar soil, creating a possible source of ...

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

Researchers have found a clever new way to map a part of Earth’s upper atmosphere that is notoriously difficult to observe. Using orbital data from roughly 1,200 Starlink satellites, they ...

Earth's atmosphere is like a protective blanket that surrounds our planet and is composed of a mix of gases. While many trace gases are present in tiny amounts, most of the air we breathe comes from ...

Earth was mostly devoid of oxygen for much of its 4.5 billion year lifetime. That is, until certain processes started to allow for the eventual buildup of oxygen up to the levels we have now (around ...

Look up on a clear night and you’ll see the streaks of our new space age. What you don’t see is the growing fallout for the atmosphere that keeps us alive. A wave of satellite launches and reentries ...