With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

Researchers mapping a bubble of superheated gas that surrounds our solar system found a surprise, there is a tunnel that may ...

British-US team detects 'biosignatures' on planet K2-18b, 124 lightyears from Earth, says it is 'closest we have come to ...

Astronomers have spent decades trying to find Earth-like planets beyond our solar system. These worlds are small, cold, and ...

"We're trying to encounter an astronomical object that streaks through our solar system just once and we don’t want to miss the opportunity." ...

Coronal holes are dark regions on the Sun seen in extreme ultraviolet and X-ray images. These areas have lower density and ...

A collection of down-to-Earth facts about our planet and its place in the solar system. This collection ... to carry on until the Moon is in this position. Opposite the Sun, I can see all of ...

If you are using your smartphone to navigate, your system just got a crucial ... the magnetic north pole’s position is determined by Earth’s magnetic field, which is in constant motion.

New research suggests meteor showers are so unpredictable due to the Sun’s own motion around the solar‑system barycenter.

Astrophotographer Josh Dury gives his best tips for photographing a solar eclipse. On March 29, a partial solar eclipse will be visible from parts of the northeastern U.S., northeastern Canada ...

In a paper slated for publication April 14 in Science, Currie reports the first exoplanet jointly discovered through direct imaging and precision astrometry, a new indirect method that identifies a ...

Despite its position in the habitable zone ... life mark a significant milestone in the search for Earth-like worlds beyond ...