A new study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, finding evidence that it could be a giant rocky planet shrouded in a thick, hot atmosphere. TOI-270 d is ...

As we celebrate Earth Month, we are kicking off a series of retrospectives on National Academies reports and activities ...

Observations of Jupiter show that ammonia is unevenly distributed in the upper atmosphere, against expectations of uniform ...

Imagine a Slushee composed of ammonia and water encased in a hard shell of water ice. Now picture these ice-encrusted ...

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

It will lead to more purple, brown, or green hues in coastal or stratified areas, with less deep blue color in water as ...

Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...

That was followed by the formation of dark patches, which the team believes comprised a mix of ammonia and water forming into ...

An uncommon double solar eruption has sent two coronal mass ejections towards Earth, which are expected to arrive Wednesday.

While trying to determine if it could use the entire Earth's atmosphere as a massive sensor, DARPA made a highly unusual ...

A Southwest Research Institute-led study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, ...