How big was the universe when it was little? Can gravitational waves slow down?
Tag Archives | universe
How do we know the universe is expanding? Do you know that Europa has giant spikes?
Some of the biggest questions in the universe depend on its shape. Is it curved? Is it flat? Is it open?
What’s up this month? Check out October sky and news roundup!
Paul reads from chapter 10, The Cosmic Web, of his upcoming book “Your Place in the Universe”.
What can make sound in space? What will happen in the far future of the universe?
In ancient times, astronomers and philosophers thought that the Earth was the center of the Universe. We know that’s wrong, but is there anything special about where we live?
This week we look at age of the Universe. How old is the Universe, and how do we know?