Sometimes in astronomy, a simple question has a difficult answer. One such question is this: what is the mass of our galaxy?
How do you weigh one of the largest objects in the entire universe? Very carefully, according to new research.
JAMES: Because mass is about the amount of matter, whereas weight is a force and is the heaviness due to gravity. ELLIE: Exactly. So let me tell you about the equation you need to calculate the ...
Currently, dark matter detection requires specialized laboratories with costly equipment. ODIN, which combines principles of ...
Dark matter, which makes up 80 percent of all matter in the universe, may have formed in the very short time before the big ...
Lambda-CDM predicts that galaxies were formed by gradual accretion of matter from small to larger structures, due to the extra gravity provided by the mass of dark matter. "Astronomers invented ...