There could be many more satellite galaxies orbiting the Milky Way than previously thought or observed, according to astronomers.

Looking up at the night sky, it may seem our cosmic neighborhood is packed full of planets, stars and galaxies. But ...

According to the prevailing “cold dark matter” theory of the evolution of the universe, every galaxy is surrounded by a halo of dark matter that can only be detected indirectly by observing its ...

Using the largest catalog of exploding white dwarf vampire stars ever gathered has provided further evidence that dark energy ...

This particular isotope burns away quickly inside stars due to their intense heat. But in cooler objects like brown dwarfs, ...

The authors find that the best fit to observational data is a universe where about 15% of the cold dark matter is oscillatory and the remaining 85% is standard dark matter.

A recent map of dark matter along a long, straight line through space supports that idea. But nothing we know so far sheds any light on what sort of stuff might actually make up cold dark matter.

Scientists at Durham University in England have identified signs that up to 100 extremely faint galaxies may be orbiting the Milky Way. These elusive objects, referred to as orphan ...

Researchers may have found our galaxy's missing companions, further bolstering science's most widely accepted cosmological ...

The outcome was the cold, heavy particles that scientists think constitute dark matter. "The most unexpected part of our mathematical model was the energy plummet that bridges the high-density ...

Evidence is mounting that cosmic dark energy, long thought constant, may weaken with time - potentially altering the fate of the universe.

Traditionally, dark matter has been viewed as “cold” and stable — particles that do not change their fundamental properties or interact strongly with light or other forces.