Nearly one third of known exoplanets are enormous gas giants, similar to Jupiter or Saturn. But whereas our solar system ...

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

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

After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Case in point: the Ivanpah solar project. Maybe you’ve seen the unsightly, blindingly bright towers while traveling from L.A.