In a groundbreaking study published inNature Astronomy, astronomers have identified the lowest-mass dark object ever ...
If it is a galaxy, then it is the smallest and most dark-matter dominated galaxy yet discovered. If it is a star cluster, then with an age of about 11 billion years, it is the oldest star cluster yet ...
WASHINGTON, June 16 (Reuters) - The universe has two kinds of matter. There is invisible dark matter, known only because of its gravitational effects on a grand scale. And there is ordinary matter ...