Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

February brings a rare planetary parade, with five bright planets in clear view and a special alignment of Mercury and Saturn ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

An curved arrow pointing right. Astronomers at the La Silla Observatory in Chile discovered three planets orbiting a dwarf star called TRAPPIST-1. These planets are much closer to TRAPPIST-1 than ...

A rare parade of planets will light up the night sky throughout January. Six planets will be in alignment for the rest of the ...

Jupiter and Mars spend the rest of the week climbing toward Mercury. On the 9th, the three planets form a neat triangle in the growing twilight. Closest approach comes on the 10th, when Mercury ...

The team's three-planet model predicted that Kepler-51d would transit around 2 a.m. EDT in June 2023, and the researchers prepared to observe the event with both JWST and APO. "Thank goodness we ...

Look west right after sunset any night this month and you’ll see something spectacular—three planets lined-up. The brightest two are at either end; Venus close to the horizon and Jupiter much ...