Which component of a galaxy has other objects that revolve around it? (A) Dust (B) Star (C) Gas (D) Universe

Stars are the components of the galaxy has other objects that revolve around it.

Stars:

Stars are the big objects in the universe that are very heavy. They have a very strong gravitation force. Hence, they attract smaller objects like Planets, and meteoroids.

For example-  Sun

Therefore, stars are the components of the galaxy has other objects that revolve around them.

To know more about galaxy, refer to the link:

link

Star

Explanation:

Star

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."