How often do stars explode in the universe? Are there so many stars that there are millions exploding all of the time?

There are billions of galaxies with billions or trillions of stars in each. So, we can't really calculate the $ of stars, so the best response would be infinite.

I assume that your 1010 means $10^10$. Then the number of stars is simply $10^10*10^10=10^20$.

There are estimated to be about (and I do mean that) 100 billion galaxies, each with an average of several hundred billion stars in it. This gives us $n =...

According to , "The Milky Way contains between 200 and 400 billion stars and at least 100 billion planets." Then they talk about some vague objects that may or may...

Near bye stars.. standard candles. variable stars. Type !a supernova. for details read Wikipedia cosmic distance ladder.\ link

There are a ton of extremely powerful telescopes both here on Earth and in space that is capable of looking billions of light years far. And we can see a...

Dark energy is part of a concept that scientists like to use to explain the expansion rate of the Universe. There are a few ways to determine the expansion rate...

There is a different story for each type of dwarf star that we cannot see. if you are considering Proxima-Centauri, Proxima-Centauri though is the closest Star to but at the...

Stars are formed when pools of gases come together through gravity. You can see these pools of gases on the NASA website by looking at pictures from the Hubble telescope....

Many stars and Galaxies are very far away t he light takes millions of years to reach us. THe light from the stars of Andromeda galaxy is 2.5 million years...