The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth.

Collisions are a growing risk as space gets more crowded, and greenhouse gas emissions could make things worse. Greenhouse ...

It seems as if Earth's atmosphere is incredibly thin, wrapped tightly around our planet. In fact, the atmosphere consists of multiple layers, with some scientists of the opinion that the atmosphere ...

Less drag therefore means extended lifetimes for space junk, which will litter ... that the thermosphere should shrink, reducing atmospheric density at high altitudes. In the last decade ...

has provided a new impetus to efforts to better model how space weather events can increase the density of the upper atmosphere and thus the drag satellites in low orbits can experience.

The current state of Earth's climate has no recorded precedent. The consequences of the sheer volume of anthropogenic ...

Knowing its radius and mass, astronomers could then calculate the average density ... James Webb Space Telescope to perform transit spectroscopy — that is, studying a planet's atmosphere when ...

An atmospheric layer of special interest is the thermosphere, where the International Space Station and most satellites orbit today. When the thermosphere contracts, the decreasing density reduces ...