You have just a few weeks left to view the "comet of the century" making its 80,000-year orbit around Earth. Comet C/2023 A3 ...

Earth will get a second moon for about two months this year when a small asteroid begins to orbit our planet. The asteroid was discovered in August and is set to become a mini-moon, revolving ...

"Detecting an exomoon would be quite extraordinary, and because of Io, we know that a volcanic exomoon is possible." ...

In 1995, astronomers confirmed the discovery for the first time of a brown dwarf, a body too small to be a star and too big ...

Though they can't see the moon itself, the exoplanet it's thought to orbit is accompanied by a large ... The cloud was unusual: While a planet can produce its own salt-rich clouds, this one ...

Not all Earth-size planets are lucky enough to be habitable. Take SPECULOOS-3 b, a rocky, Earth-like world whose orbit around its red dwarf star is a little too close for comfort. Completing an ...

Mars is the fourth planet from the sun, and the second closest to Earth (Venus is the closest). But the distance between Earth and Mars is constantly changing as they orbit the sun. In theory ...

Scientists have been observing a brown dwarf for decades, and now they have discovered that it is actually two dwarfs ...

Mars experiences a dynamic seasonal change in its ice caps, causing fascinating geological formations. The European Space ...

As you may recall from a recent column, the final fate of Earth depends on the last stages of the sun’s life, its red-giant ...

A spacecraft blasted off Monday to investigate the scene of a cosmic crash. The European Space Agency's Hera spacecraft ...

Using the James Webb Space Telescope, astronomers have revealed new atmospheric details about WASP-107b, an exoplanet known ...