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.
A new method of measuring star formation in the earliest galaxies finds that they’re producing more massive stars than expected — a result that could affect our understanding of how galaxies grow their stars.
A simple experiment has detected a signal from the first stars forming just 180 million years after the Big Bang. The observations have intriguing implications for the nature of dark matter.
Results from the first data release of the Dark Energy Survey include eleven new stellar streams in the Milky Way galaxy.