Astronomy Cast Ep. 644: Is Earth… Normal?

<p class="p1"><a href= "https://www.youtube.com/watch?v=FWmMwisoBSQ">https://www.youtube.com/watch?v=FWmMwisoBSQ</a></p> <p class="p1">We've now discovered thousands of exoplanets, we're learning more and more about the kinds of planetary systems there are out there across the Universe. But are planets like Earth unique or totally rare?</p> <p class="p2"> </p> <p class="p1">We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.<span class="Apple-converted-space"> </span></p> <p class="p1">Just visit: <a href= "https://www.patreon.com/365DaysOfAstronomy">https://www.patreon.com/365DaysOfAstronomy</a> and donate as much as you can!</p> <p class="p1">Share the podcast with your friends and send the Patreon link to them too!<span class= "Apple-converted-space"> </span></p> <p class="p1">Every bit helps! Thank you!</p> <p class="p1">------------------------------------</p> <p class="p1">Do go visit <a href= "http://www.redbubble.com/people/CosmoQuestX/shop">http://www.redbubble.com/people/CosmoQuestX/shop</a> for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness!</p> <p class="p1"><a href= "http://cosmoquest.org/Donate">http://cosmoquest.org/Donate</a> This show is made possible through your donations.<span class= "Apple-converted-space"> </span></p> <p class="p1">Thank you! (Haven't donated? It's not too late! Just <a href="http://cosmoquest.org/Donate">click</a>!)</p> <p class="p1">------------------------------------</p> <p class="p1">The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. <a href= "http://www.psi.edu">http://www.psi.edu</a></p> <p class="p1">Visit us on the web at <a href= "http://365DaysOfAstronomy.org/">365DaysOfAstronomy.org</a> or email us at <a href= "mailto:info@365DaysOfAstronomy.org"><span class= "s1">info@365DaysOfAstronomy.org</span></a>.</p>