Ultraprecise Atomic Clock Network on the Hunt For Dark Matter

Researchers are putting a global network of the most precise timekeepers ever made to the task of hunting for dark matter, the invisible and largely intangible substance that researchers think makes up about five-sixths of all matter in the universe.

What Is Solar Mass?

How would you measure the masses of objects as big as stars, galaxies and black holes? With solar mass. And you can thank Sir Isaac Newton for that.

A Helium Tail Trails This Fluffy Alien Planet

As a Jupiter-size world swings around its small but active star, bombarded by radiation, the planet leaves behind a tail of escaping helium as wide as itself — and researchers have spotted this tail from the ground.

What Are Meteorites?

When you wish upon a star, you're watching space debris fall to Earth.