The Milky Way galaxy is approximately 100,000 light-years (30 kiloparsecs, 9x1017 km) in diameter, and is considered to be, on average, about 1,000 ly (0.3 kpc) thick .
There are at least 100,000 sentient species in a fictionalized version of the PGC 198197 galaxy (a spiral galaxy 900 million light-years from Earth, and is 100,000 light-years in diameter, and contains 100 billion stars (each star is orbited by an average of 9 planets and 170 moons; as well as asteroids and nebulae)).
Since it's a fictional setting, it's really up to the author(s) how many planets there are, but assuming it's similar to the Milky Way, probably hundreds of billions.
82 years
10000 years fag
It is 307 Years
It's a dwarf galaxy; the diameter is about 6500 light-years (according to information in the Wikipedia article).
100,000 ly across but only about 1000 ly thick.
The Andromeda Galaxy is approximately 220,000 light-years in diameter, which is equivalent to about 1,294,833,160,000,000 miles.
The nearest galaxy to our Milky Way is the Andromeda galaxy, which is about 2.5 million light years away (that is not including the Large and Small Magellanic Clouds, small, irregular "satellite" galaxies of our own).
The Milky Way is estimated to be about 2,000 light years thick, but about 100,000 light years long/far... Which i guess you can tell, thats a lot.
8 billion light years means that the light has taken 8 billion years to reach you. That's how far into the past you are seeing.
23 million light-years.
The Andromeda galaxy is approximately 2.537 million light-years away from Earth.
The Andromeda galaxy is approximately 2.537 million light-years away from Earth.
100 years ago
Somewhere around 26,000 light-years.
The Milky Way galaxy is around 100 thousand light-years across from end to end. (A light-year is the distance light travels in a year through the vacuum of space, equal to just under 10 trillion kilometres). It contains around 100 billion stars, many of which are thought to have solar systems of their own.