We often focus on space observatories that peer beyond Earth. But the vast majority of satellites stare right back at us.

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

Earth Day is April 22. Here's what to know about how Earth Day happened and how to celebrate our planet this April.

Earth Day has been celebrated across the country for more than 50 years now, and the annual celebration is once again around ...

About 4 billion years ago, Earth began to show signs of the conditions that allowed the first cells to take hold and populate ...

A group of scientists and NASA got together and with the help of supercomputers came up with a date for total and complete ...

Astronomers used ALMA to observe Proxima Centauri and found frequent, intense flares that could destroy atmospheres of nearby ...

SpaceX launched the private Fram2 mission Monday (March 31), sending a crew of four spaceflight rookies into an orbit never ...

The Walt Disney Company revealed its Earth Month programming plans with a campaign led by National Geographic to spotlight ...