Cosmology

Newly discovered lobes stretch tens of thousands of light-years above and below the Milky Way's disk. Where did they come from?

Emerging evidence suggests that the first starlight to shine after the big bang’s flash came from distant suns that ranged from very large to incredibly huge

The invisible dark matter particles that dominate the universe may come in strange and varied forms

The Dark Energy Survey is examining distant galaxies to figure out why space is expanding at an ever faster pace

As you dig into those mashed potatoes, be grateful the universe’s physical constants are so precise that a slight variation in any one would render that drumstick—and even your existence—impossible

A collision between the Red Planet and its innermost moon, Phobos, could create a Saturn-like field of debris

A dozen quasars in the early universe appear to have shut down in just a few years, baffling astronomers

Scientists photograph a gas-giant exoplanet forming around a young star that lies about 450 light-years from Earth

Astronomers get closer to an explanation for the unexpected abundance of gamma rays at the core of our galaxy

The recently discovered small galaxy Leo P contains only about a hundred-thousandth as many stars as the Milky Way, but it's bucking the small galaxy trend by continuing to make new ones

Scientists will use wonky orbit to test Einstein’s theories