Can anyone help with this astronomy question?

Question

Based on Hubble’s law, with , how long will it take for the distance from the Milky Way Galaxy to the Virgo Cluster to double?

Answer 1

The Milky Way and the Andromeda Galaxy are a binary system of giant spiral galaxies belonging to a group of 50 closely bound galaxies known as the Local Group, itself being part of the Virgo Supercluster.

Answer 2

Sorry, but Hubble's law will not help you finding this out really. The law only describes his observation of the current velocity of the galaxies. He does say if they accelerate, change course or might even stop.

Assuming the velocity stays constant (which is not likely), you need only to first calculate the velocity of the cluster, which is 1296 km/s.

The distance is about 18 Mpc or 555.426E18 km. To double, it would thus need 13.58 billion years, when the velocity remains constant.

Answer 3

Last I knew....the distance from the Milky Way to the Virgo Cluster will decrease...because....as I have read....the Milky Way and the Andromeda galaxy will merge together...then this whole merger will be sailing right toward the Virgo Cluster.