Astronomy Cast Questions Show - Stellar Roche Limits, Seeing Black Holes & Water on Mars

From January 1, 2009. This week we find out when stars get torn apart from gravity, how we can see supermassive black holes, how liquid water could have existed on Mars in the past, and much more.   - Is there a “stellar” Roche Limit for binary stars? - Why are black holes seen as bright areas in astronomical images? - How could there have been water on Mars in the past? - Are there lots of jobs out there for prospective astronomers? - What evidence do we have that the Universe was small, hot and dense just before the Big Bang? - What legal issues are there for astronomy and space exploration? - Why don’t planets “twinkle”?   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.  Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too!  Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations.  Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at [email protected].