How Many Aliens are Out There?

Nobody knows how many aliens there are out there, and if any of them are looking for us. BUT... we can take a guess. A really good guess. That guess is called the Drake Equation, which will calculate how many alien civilizations there are just in our one galaxy. And you can use it right now to see how many ETs might be looking for you!
First, you need to know how many stars there are in our Milky Way Galaxy.
Scientists are pretty sure the Milky Way has between 200 billion and 400 billion stars (that's 400,000,000,000!) But there may be even more, or perhaps you want to know how many aliens there are in a smaller or bigger galaxy. Choose whatever number seems fun!
How Many Stars Are There in The Milky Way?

My son would love to say, "Thank you so much!! My favorite part was the blasting off rocket! Thank you thank you thank you. You made my birthday so special and my friends had a blast." Thank you for making my son's birthday so wonderful. It was so much fun for them. Kudos to you and your rockets!!!
– Julie J