A retro-futuristic space truck. A nimble crustacean on wheels. A space-age dune buggy. One will win a multibillion-dollar prize to deploy on a future NASA Artemis mission. But first, we took a ride on ...

No special equipment is needed to view the supermoon if clear skies permit. But the change in the moon's size can be tough to discern with the naked eye.

The comet's green glow is caused by fluorescence of diatomic carbon (C2) when exposed to ultraviolet sunlight, not reflection.

An interstellar comet that originated outside our solar system just made its closest pass of the sun, setting it on an outgoing path — but it’s not leaving our cosmic ...