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

Wednesday, February 5 First Quarter Moon occurs at 3:02 A.M. EST. Nearly half a day later, the Moon passes 5° north of Uranus ...

Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

Mars still is spectacularly brilliant, as brilliant as it will be for another 26 months. When the Red Planet again falls into an orbit opposite the sun - called “opposition.” It is so bright that with ...

Astronomers have retracted the discovery of a new asteroid after realizing the object was the remains of Elon Musk's Tesla ...

Mars Ingenuity helicopter's 59th flight was captured by the Perseverance rover's Left Mast-cam camera. Credit: Credit: ...

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

Though it's a cold, dead planet, Mars still has its own natural beauty about it. This image shows us something we'll never ...