The methods and techniques for gathering astronomical data, as well as the limitations thereof.

learn more… | top users | synonyms

1
vote
1answer
349 views

How is the mass of black hole at the center of our galaxy measured?

I've been watching a video about dark mater and a lot of the mass is missing in our universe. Astronomers got to this by measuring the speed that stars orbit the center of the galaxy and when they did ...