The object dubbed Earth's "second moon" is actually a quasi-satellite that's accompanied the planet since 1957 — not a true ...

Despite its small size, Mars seems to have a huge impact on the orbital cycles that govern Earth’s climate, especially those ...

The space rock is hurtling through our cosmic backyard at a zippy 26,200 miles per hour, according to the space agency.

Venus looks like Earth’s twin at first glance, yet its rotation behaves like a cosmic prank. The planet spins backward, ...

This coming July, Venus could plow through the dust generated by an asteroid breakup thousands of years ago, potentially ...

Earth’s ice ages have long been blamed on subtle wobbles in our own orbit, but new research suggests a distant accomplice is ...

The other two known interstellar comets did not offer such an opportunity.

Learn how to calculate the Earth’s orbital speed using fundamental principles of orbital mechanics and gravity. This video walks through the key equations and physical reasoning that explain how Earth ...

The atmospheric carbon dioxide was thought to be the result of the oxidation of oxygen molecules in the exosphere. As a ...

International Space Station, where astronauts have lived and worked for 25 years, is visible to us on Earth. How to see it ...

New research suggests another connection, one between these two asteroids and a possible Venusian meteor shower. If this is ...