Galaxy Births

Here are the births of the galaxies I know:

Milky Way: Approximately 14 billion years ago

Andromeda Galaxy: 10 billion years ago

Messier 81: About 600 million years ago

Whirlpool Galaxy: Unknown

Large Magellanic Cloud: Approximately 13 billion years ago

Triangulum Galaxy: About 3 million years ago

Small Magellanic Cloud: Approximately 13 billion years ago

Sombrero Galaxy: Between 10 and 13 billion years ago

Centaurus A: 100 million years ago

Pinwheel Galaxy: 21 million years ago

Messier 82: 500 million years ago

Messier 87: Unknown

Wolf-Lundmark-Melotte: Unknown

Black Eye Galaxy: Unknown

Andromeda I: Unknown

Cartwheel Galaxy: About 200 million years ago

NGC 5866: Unknown

Messier 63: Unknown

Circinus Galaxy: Unknown

Mayall's Object: Over 12 billion years ago

Sagittarius Dwarf Spheroidal Galaxy: Unknown

Canis Major Overdensity: Between 190 and 240 million years ago

Messier 83: Unknown

Hoag's Object: Unknown

NGC 6822: Unknown

Sculptor Dwarf Galaxy: Unknown

Leo II: Unknown

Messier 32: Unknown

Andromeda III: Unknown

Andromeda II: Unknown

Malin 1: Unknown