Andromeda with its companion and Milky Way with its satellite galaxies make a shape like a “dumbbell”.

Local Group Galaxy Mapīelow is the map of the local group (only mentioned some large and famous galaxies). It means the diameter of the local group is around 10 million light-years (9 × 10 19 kilometers). If you travel at the speed of light, you will take almost 10 million years to cross the local group from one side to another. Let me tell you a fact about Local group galaxies. So, how large is the local group? This group contains many galaxies, so definitely it would be very large. Read About:- 20 Special Facts About Milky Way Galaxy

It means if you travel with the speed of light (300,000 km/sec), you will take 150 thousand years to cross one side to another side of the milky way. The approximate diameter of the Milky Way is around 150,000 light-years in diameter whereas the approximate diameter of Andromeda is around 220,000 light-years. Milky Way and Andromeda are the two largest galaxies in the local group. Andromeda and its satellite galaxies form one side lobe of the dumbbell whereas Milky Way and its companion galaxies form another side of the dumbbell lobe structure. The local group galaxies made a shape like a “dumbbell”. Most of these satellite galaxies are dwarf-type irregular galaxies. These large galaxies also have many satellite galaxies (it is like planets that have many satellites/moons).

Andromeda is the biggest and our Milky Way is the 2nd biggest galaxy in the Local Group.

Volume of local cloud galaxy