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

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

In October 2020, a van-sized robotic spacecraft briefly touched down on the surface of Bennu, a 525-meter-wide asteroid 320 million kilometers from Earth.

It took two years for NASA's OSIRIS-REx space probe to return from asteroid Bennu before dropping off a small capsule as it ...

Could extraterrestrial life exist beyond Mars?  Join NASA’s search for alien life in the outer solar system as we explore ...

The wannabe asteroid, announced on Jan. 2 as 2018 CN41, is actually a Tesla Roadster launched into space years ago by SpaceX ...

Active Surfaces says its thin, flexible solar collectibles can be attached not just to roofs, but walls, tents, backpacks, ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

The Znamya project had the potential to change the world. The BBC's Tomorrow's World reported on an experiment that was ...

An asteroid that orbited near Earth for a few months as a mini-moon may be a chunk of the moon that was blasted off by an ...

Despite sweetening the pot by grandfathering existing rooftop solar systems, opposition to tinkering with net metering ...

Increasing solar power is reshaping the national energy grid, with wholesale prices plummeting during the day but spiking ...