Gravitational-wave observatories have detected the most massive black hole merger yet, and it's challenging our ideas of black hole formation.
The latest data release from a survey of 31 million galaxies reveals that our universe is even smoother than we thought it was.
The Sloan Digital Sky Survey has released a new map of the universe — and the results confirm ongoing tension over the expansion rate of the universe.
Astronomers observing a distant galaxy have dramatically shrunk the range of possible properties of a long-predicted — but never-detected — subatomic particle.
The Hubble Space Telescope, which will celebrate its 30th birthday this April, has images cosmic mirages that yield two remarkable cosmological results.
Nearly 11 billion years ago, the universe churned out stars at a rate 10 times greater than today. And yet all the starlight in the cosmos appears no brighter on the sky than a 60-watt light bulb seen from miles away.
A recent experiment to better understand the nature of dark matter constrains a possible "fifth force" of nature to almost zero.