The galaxy is called the Milky Way.
The Earth resides in the system Sol, which resides in the Milky Way galaxy.
Earth's gravity keeps everything molded to it's surface.
No
in the center
...yes
hare
Carbon is found in the earh
3,963.1676 miles
6,840,507,000 people
Alpha Centauri
A mean distance is 93,000,000 miles ( Ninety three million miles). Since the Earth orbits the Sun on an elliptical track , with the Sun at one of the Foci (Plural of the noun 'focus'), of the Ellipse, (Not the centre of the ellipse), then the distance varies depending on the Earth's position. NB See Johannes Kepler in Wikipedia. The Earth sweeps equal arcs of the ellipse in equal times. Also to compound this effect we take the Moon with use on our annual orbital track.
Geocentric theory.