This week we wonder if the Universe is going to collapse and then expand again, how satellites can have such different velocities, and the size of the observable Universe.
What came before the big bang? How do we know the shape of the universe? We’re gonna need a bigger telescope!
How is Mars getting all its methane?
Why are there no green stars? How do we know what the big bang made?
Where’s the best place to live on Mercury? Where did the Big Bang start? lets find out the answer here at #365DaysOfAstro
Why the universe expands? How can black holes form in the big bang? more with @PaulMattSutter at #365DaysOfAstro
What did Hubble really discover? Why does redshift imply an expanding universe? Why is the night sky dark? Why is there so much hydrogen, and how is that connected to the Big Bang?
We get questions every week about string theory and topics popularized by science fiction. Here’s the problem. There’s just no evidence.