We can't see it. It might not be made of normal matter. Our telescopes haven't directly detected it at all. But it sure seems like it's out there.
Roughly 80 percent of the mass of the universe appears to be dark matter: an invisible material that seems to interact with ordinary matter only through gravity, without emitting light or energy. Scientists cannot detect dark matter directly and don't yet know what it's made of, but they track its influence based on the motions of stars and galaxies. The presence of dark matter is necessary to explain the universe's current structure.
We now have a better idea of how big black holes were born in the early universe, a new study reports.
These tiny subatomic particles, showering down from the depths of space, continue to surprise (and annoy) physicists chasing them.
Astronomers barely know anything about dark matter, but now they know this: It behaves differently in old, dying galaxies than in new, star-forming ones.
As 2019 nears, physicists are hard at work on the next generation of dark matter detectors, and on parsing confusing data from detectors that already exist.
Stars that have been torn from their natal galaxies and now float within huge galaxy clusters can serve as dark-matter probes, a new study suggests.
A summertime sparkle seemed to hint that researchers had found dark matter, but it looks like those scientists were wrong.
Scientists think there's a 'dark matter hurricane' coming, but it's definitely not going to kill you. It's actually kind of exciting.
To study what is accelerating our universe's expansion, scientists will use a new experiment that employs choreographed robots to watch millions of galaxies every 20 minutes.