NASA plans to prioritize the fission reactor as power necessary to extract and refine lunar resources.

A pair of solar eruptions may combine into a powerful "cannibal CME," boosting chances for dazzling auroras over Labor Day.

Early risers are in for a spectacular show next week, when Jupiter, Venus and Mercury form a planetary lineup in the predawn sky on Sept. 1.

"Deployment of 28 Starlink satellites confirmed." With that statement, posted to social media, SpaceX wrapped another launch in support of its broadband internet satellite megaconstellation on Sunday ...

Think you know Pluto? From icy plains to planetary debates, this quiz dives deep into the mysteries of our solar system’s most controversial—and captivating—dwarf planet.

The Aurigid meteor shower hails from debris of the comet C/1911 N1 Kiess, which last visited the inner solar system 2,000 years ago.

The total lunar eclipse will begin globally at 11:28 a.m. (1528 GMT) on Sept. 7, with totality occurring at 1:30 p.m. ET (1730 GMT) and stretching on for a staggering 82 minutes before the deepest ...

"JUICE will use the gravity of Venus this week to bend its orbit around the sun and gain speed relative to Earth without using fuel," ESA wrote in the Aug. 25 statement. "JUICE will use the Earth ...

An executive order (EO) signed by President Trump on Thursday (Aug. 28) — just before millions of Americans began their Labor ...

New videos give us multiple angles of Ship's Flight 10 splashdown, and they show us the toll that reentry took on the vehicle ...

Auroras may be visible from Alaska to Illinois as an incoming solar storm could spark geomagnetic storm conditions this Labor Day.

Starship Flight 10 lifted off from SpaceX 's Starbase site in South Texas on Tuesday evening (Aug. 26). The rocket met each ...