What would the night sky look like if I were in an alternate universe

Assuming the same laws of physics in our universe applies to that alternate universe. <br><br>What would the night sky look like if I were in an alternate universe in which Earth never had the moon to orbit it?<br><br>What would the night sky look like if I were in an alternate universe in which Earth was the only planet to orbit the Sun?<br><br>What would the night sky look like if I were in an alternate universe in which Earth had a moon that was 2.5x the size of our moon?<br><br>What would the night sky look like if I were in an alternate universe in which the Milky Way galaxy was the only galaxy in the universe?<br><br>What would the night sky look like if I were in an alternate universe in which the Milky Way galaxy was the only spiral galaxy in the universe?<br><br>These are just questions. I don't know the answers yet. I'm going to use a combination of orbital simulation and image editing to find the answers. I'll post the results in a future post.