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What actually is the mass? [closed]

Since high school, I've been told that the definition of mass is "quantity of matter" (which is absolutely wrong, I guess). If mass is actually a quantity of matter and it is a measure of ...
Kavin Ishwaran's user avatar
6 votes
2 answers
374 views

Is there a way to calculate the mass of of a stellar remnant given the initial mass of the star?

Assume there is a star in a completely empty region of space, away from any outside influence. Is there a way to calculate the mass of a resulting stellar remnant, a white dwarf, neutron star, or ...
Max0815's user avatar
  • 1,882
2 votes
2 answers
316 views

Does the mass of a collapsing star change?

Does a star, when collapsing into a neutron star, or even a black hole, pick up any significant relativistic mass due to its rapid collapse rate?
change_picture's user avatar