some 100,000-120,000 light-years in diameter, which contains 100-400 billion stars
An average dwarf galaxy is small in diameter.
600,000 trillion.
The dwarf galaxy is about 8,000 miles in diameter.
The Andromeda Galaxy is approximately 220,000 light-years in diameter, which is equivalent to about 1,294,833,160,000,000 miles.
Yes, it's diameter is 30,685 miles, it is also a gas giant.
Mars has an average diameter of about 4,220 miles.
Mercury has a diameter of 4,878 km, which makes it the smallest planet in our Solar System. For a comparison, the diameter of the Moon is 3,473 km.
The diameter of Mars is approximately 6,779 km (4,212 miles), making it about 0.532 times the diameter of Earth.
Cordelia, one of the moons of Uranus, has an average diameter of about 40 kilometers (25 miles).
The Universe may hold over a trillion (1,000,000,000,000) galaxies. A galaxy might have several billion stars. The planetary portion of the Solar System is several billion miles in diameter; no star is that big, although some red giants would reach the Earth if they were centered on the Sun.
The diameter of the Earth is approximately 12,742 kilometers (7,918 miles). This measurement can be calculated by taking the average of the Earth's polar and equatorial diameters. The equatorial diameter is about 12,756 kilometers (7,926 miles) and the polar diameter is about 12,714 kilometers (7,900 miles).
In Jan 1987, John Cormedy of Dominion Astrophysical Observatory in Canada discovers the balck hole in Galaxy Andromeda and estimated that the diameter of black hole in Andromeda Galaxy is 10 million times as massive as the Sun.