If you looked up at the night sky on a perfectly clear night, you can make out about 5,000 stars. The furthest one, called V762 Cas, is a bit over 16,000 light years away. To put it into perspective, there are 100 billion stars in the galaxy, and the galaxy from tip to tip is 100,000 light years.
If you’re like me, you’ve looked up at the night sky and wondered how many of those stars have planets orbiting them. Recent science has found that, in all likeliness, they all do, and about a quarter of rocky planets orbiting them. It seems more and more like alien life is not just likely, but certain.