Reference Gravity can be described in a variety of ways. Here's how Newton and Einstein took gravity from an observation to a measurable phenomenon.
Reference White holes are theoretical cosmic regions that are opposite to black holes. Just as nothing can escape a black hole, nothing can enter a white hole.
Astronomers have tracked 500 fast radio bursts to their locations in the sky, and found they come in two flavors.
Few know the globe's nooks and crannies more intimately than Kathryn Sullivan — explorer and student of the sky and the sea.
Flying at the very tip-top of Earth's atmosphere, SOFIA has almost as clear a view as space-based telescopes.
Going to the moon is hard, and Israeli nonprofit SpaceIL is one of a handful of organizations that knows exactly how hard.
The CHIME radio telescope aims to explain two poorly understood cosmic phenomena, one dating back to the early universe and one taking place today.