Question

Could you please tell me which is more common in our Galaxy: white dwarfs or black holes ? Why ?

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Answer 1

Answer:

The answer is that we don't know. Certainly when we look at our galaxy we see mostly stars, many many stars. So at first you might think that since it is common for stars to end their lives as white dwarfs, slowly cooling off forever, that there might be more white dwarfs than black holes in the Milky Way. However, we have to remember that data suggests a huge sphere of dark matter around the Milky Way, matter that we cannot see in any wavelength we've looked so far but which is detectable through its gravitational effects. We don't know what this dark matter is made of, it could be made of either white dwarfs or black holes, some combination of both, or neither. So, we can't answer your question yet!

Explanation:

Hope it will help you..

Answer 2

White dwarfs are much more common than black holes in galaxies. The reason for this is that black holes are the remnants (final states) of extremely massive stars (> 25 solar masses) while white dwarfs are the remnants of intermediate and low mass stars (< 10 solar masses).