Travelers in the Night - Eps. 267 & 268: Hiding From E.T. & Mars Weather Report

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. Today's 2 topics: - Some scientists are concerned that we should not contact extraterrestrials if we find them. It might be possible to mask a transit of Earth from an extraterrestrial planet that would see one. The same system could be used as a signal beacon to say "Hi!" instead. - The Curiosity rover has amassed a 2 year Martian weather dataset. The temperatures swing wildly from day to night and summer to winter. Enter the code for this week into this site: https://cosmoquest.org/achievements/code for a chance to win. This week's code is pGC3XF Do go visit http://astrogear.spreadshirt.com/ 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 Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org. While you're at it, do support our Learning Space educator training program by going to this site: https://www.patreon.com/LearningSpace Please help us keep training the trainers! Learning Space is a weekly G+ Hangout on Air about topics in astronomy education, outreach and other ways to share science both in the school setting and outside it. We bring you interviews, hands-on demonstrations, lists of our favorite educational resources and more!