Cosmology is big-picture astronomy — the universe on its grandest scales. From the mysteries of dark matter and dark energy to the vast cosmic web, modern cosmology probes what makes the cosmos tick.

Here you’ll find Sky & Telescope’s coverage of the latest discoveries in cosmology. Want to know about evidence for the Big Bang or hints of new physics? What about the expansion of the universe and the effects of dark matter? Interested in knowing what happened a long, long time ago in galaxies far, far away? What can we learn about galaxy formation at the very beginning if we gather enough photons? We bring you in-depth reports on the early universe, ancient galaxies, and the cosmic microwave background, the leftover radiation of the universe’s birth. As scientists peer farther back in time and space, pushing the limits of the knowable, we’ll be your guides on the quest to reach the cosmic dawn.

artist's impression of a black hole

Monster Black Hole in Early Universe

Astronomers have discovered one of the brightest quasars in the early universe. The source, SDSS J010013.02+280225.8 (hereafter J0100+2802), is powered by a supermassive black hole at a redshift of 6.3, meaning that its light left it 12.8 billion years ago.


BICEP’s Big Bang Finding Reduced to Dust

Yes, it was too good to be true. The cosmic "discovery of the century" last March has officially blown up. Or will blow up next week when a new analysis of polarization in the cosmic microwave background is officially released. The excitement burst onto the world 10 months ago when the BICEP microwave background team,…

local supercluster

Laniakea: Our Home Supercluster

Astronomers have mapped the cosmic watershed and discovered a massive supercluster that extends more than 500 million light-years and contains 100,000 large galaxies. The Milky Way sits on the edge of this humongous structure.