What is the mass of Earth? Name the nearest galaxy to the Milky Way Galaxy.

The mass of Earth’s is 5.9722 x 10²⁴ kg.

At present, the "Canis Major Dwarf" galaxy is the closet known galaxy to the Milky Way. This stellar formation is about 42,000 light-years from the galactic centre (centre of the milky way) and merely 25,000 light-years (7.7 kiloparsecs) away from our Solar System. It’s the most distant thing you can see with the eye alone.