Its typical temperature at its noontime is about four Kelvin, and its total mass is estimated to be 40 times that of the Earth.
Its typical temperature at its noontime is about four Kelvin, and its total mass is estimated to be 40 times that of the Earth. It is believed to have a dense core lying near the ecliptic, the contents of which continually replenish its outer boundaries.  Besides the weak gravitational pull of the sun, it is also affected by tidal forces produced by other stars in the Milky Way's galactic disk, often causing some of its roughly six trillion objects to pull away.  FTP, what is this source of long-period comets at the fringe of our solar system, first theorized by a Dutch astronomer in 1950 and known as his "cloud"?
Its typical temperature at its noontime is about four Kelvin, and its total mass is estimated to be 40 times that of the Earth.
Oort Cloud  (do not accept Kuiper Belt)