plus trace amounts of other gases. The atmosphere has four layers. The troposphere is the layer closest to the surface of the Earth. Next is the stratosphere, which is where commercial airplanes fly.

though not as drastically different in composition as you might assume. Earth's atmosphere is composed of 78% nitrogen gas (N2) and 21% oxygen gas (O2). The final 1% is a mix of argon, carbon ...

From this route, the resulting exoplanet would be expected to share roughly the same composition as its parent star. ‘The ...

“Xenon is a noble gas which, being chemically inert and having nine isotopes, is an ideal element to reveal the xenon isotopic composition in the Earth’s primary atmosphere. This also makes it an ...

We are at a critical time and supporting climate journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen ...

in an experiment that seeks to reveal how auroral substorms affect the behavior and composition of Earth's far upper atmosphere. A NASA spacecraft will make another close brush with the sun ...