Galaxies are massive, gravity-bound structures of dust, gas, dark matter, and anything from a million to a trillion stars.
Supermassive black holes are expected to exist at the centre of almost all big galaxies.
The sun is one of around 100 to 400 billion stars that orbit Sagittarius A*, a supermassive black hole with the mass of four million suns, in our own galaxy, the Milky Way.
We observe more galaxies as we go further into the universe. According to a 2016 research, the visible universe comprises two trillion galaxies, or two million million.
Some of the distant systems resemble our own Milky Way galaxy, while others are vastly different.
Answers & Comments
Answer:
infinite....
Explanation:
we have not yet discovered all the galaxies in the whole universe
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