I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event ...

Moons and other matter. More than 150 moons orbit worlds in our solar system. Known as natural satellites, they orbit planets, dwarf planets, asteroids, and other debris.

All solar systems, including our own, are thought to have started out like this one, according to the scientists. But it's estimated only 1 in 100 systems have retained that synchrony, and ours ...