I’m making a wallpaper for my computer, and I need some help with numbers. I’ve poked around a bit but thought that perhaps someone with Astronomical knowledge might be able to give me the answers. Here is what I have so far:
The background is a view of the Milky way from above it’s axis as a barred spiral galaxy. Sol is indicated on the picture (You can get this pic from the NASA image site btw) Underneath Sol I have added the comment “You are here”, I’ve added a double ended arrow from Sol to the center of the galaxy and the comment “approx. 28,000 Light years”, I have another double ended arrow crossing the diameter of the galaxy that says “Approx. 100,000 light years” At the bottom I have written “The Milky way is one of an estimated 100 Billion Galaxies.” and “The estimated number of Galaxies has only increased over history”
I want to add some things on the side, first I want to say “The Milky way contains approximately 200 billion stars” “If intelligent life occurs on at least one out of every 100 billion stars we are not alone in the Galaxy”
Next I want to say “The universe contains approximately (S) stars (I don’t know the value of S) that is (X) times as many stars as our Galaxy.” and " If intelligent life occurs on at least one out of every (S/2) stars, we are not alone.
Lastly I want to say "The estimate of 100 Billion Galaxies and (S) stars includes only the observable universe. Because of the speed of light we can only see part of the universe, it is highly likely that there are more Galaxies and Stars than we can see.
Can anyone fact-check what I have so far, and tell me the value of S?
Just in case anyone is interested, the title at the top of this wallpaper is “Your place in the universe”