Earth and Mars are constantly moving, but don’t stay a constant distance apart. Plus, spacecraft don’t travel in a straight line to their destination.

A new study shows that the event that wiped out the dinosaurs caused only a small drop in shark and ray species at the same ...

This faraway, ancient ball of stars may have been captured from another galaxy that passed too close to the Milky Way.

Mercury, Venus, and Saturn put on an early-evening display in the west, while Jupiter dominates the rest of the night. Jupiter features many events involving its four major moons that are well worth ...

The bright star Sirius dominates the southern sky late this evening, blazing high in the south around 10 P.M. local time. You can use this sparkling star to point your way to the open cluster M47 in ...

Though NASA was optimistic about launching four astronauts on a trip around the moon as early as Friday, the space agency is now looking at March after complications during a key preflight test. As it ...

With the waning Moon rising later and later, there’s a dark window between sunset and moonrise to get in some deep-sky observing. Tonight we’re seeking out M106, a great galaxy to observe with your ...

Our universe is filled with particles, such as electrons and protons, which make up all the stuff on our planet and beyond: animals, plants, people, planets, asteroids, stars, gas clouds, and galaxies ...

With 274 confirmed moons as of March of 2025, Saturn is the solar system planet with the most natural satellites. By 1789, though, only five had been spotted: Titan by Christiaan Huygens in 1655, and ...

Their new study shows that Earth’s massive drop in temperature after the dinosaurs went extinct could have been caused by a large drop in calcium levels in the ocean. The study showed that the ...