so each pole is sometimes pointing more toward the sun and sometimes more away from it. So, Earth's orbit only has a relatively tiny deviation from perfect circularity. But why is it so often ...

The threat of a newly discovered asteroid has risen slightly in the past few weeks, as the world’s telescopes rush to track ...

How fast is Earth moving? The sun doesn't sit idly in the center of these ellipses at equal distance from their farthest points. It actually follows its own tiny elliptical orbit around what is ...

The risk of impact is likely to drop to zero as observations of Asteroid 2024 YR4 continue.

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

The Blue Ghost lunar lander, built by the Texas-based company Firefly Aerospace for NASA, launched to space on Jan. 15, and is slated to attempt a challenging moon landing on March 2. Now in Earth's ...

Planetes means “wanderers” in ancient Greek, referring to the fact that as the planets and Earth orbit the sun, those dots of light in the sky appear to move relative to the background stars.

On Mercury, the hot days are also incredibly long. Because Mercury rotates so slowly — once every 58 Earth days — in some places, the sun can appear overhead for weeks at a time. A year on ...

While the apparent increase in collision probability for December 2032 may seem concerning, experts stress that the risk ...

NASA and the European Space Agency have issued updates on what is considered to be the most dangerous asteroid astronomers ...

On January 18, the team at Firefly carried out Blue Ghost’s first engine burn, firing up the lander’s thrusters and main ...