Shelf Life Episode 5 – How To Time Travel To a Star – @AMNH video

Museum astrophysicists are searching through early photographs of the night sky and, with the help of high school students, helping to digitize them along the way. For more about astronomical instrumentation through the ages, head over to the episode website:http://www.amnh.org/shelf-life/shelf-…

How Many Stars Are There? – New video from @okaytobesmart

How many stars are there in the universe? Are there more stars out there than grains of sand on Earth? Thanks to advanced space telescopes, we’ve been able to peer farther into deep time and the distant universe than we ever thought possible, and we might finally be able to answer these mind-boggling questions.