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 ...

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.

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 ...

The ice-giant planet Uranus, which travels around the sun tipped on its side, is a weird and mysterious world. Now, in an ...

"Our behavior with greenhouse gases here on Earth over the past 100 years is having an effect on how we operate satellites over the next 100 years." ...

This cooling reduces atmospheric density, lessening the drag that normally pulls space debris down towards Earth, where it burns up upon re-entry. Consequently, a less dense upper atmosphere ...

Unlike on Earth, where the atmosphere and planetary magnetic field provide a shield from space radiation ... downward pull of gravity leads to bone density loss and muscle atrophy.

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