Observations of the center of our galaxy known as sgr a* show that about 4.6 million solar masses are crammed into a volume that has a diameter that is no larger than the orbit of mercury true false

True

Explanation:

Sagittarius A

Sagittarius A is a very bright  and very compact astronomical radio source star present in the milky way galaxy . It has a mass of almost around 4.5 million solar mass and , Here we find the super massive black hole .

and the  black hole is the last stage of a star which forms due to supernova explosion.