Cheap Astronomy - Dear CA # 81: Distant Horizons

<p class="p1"><em>If the Big Bang happened 13.8 billion years ago how come we can still see it?<span class= "Apple-converted-space"> </span></em></p> <p class="p1">What we can see is the cosmic microwave background, the CMB, which was a flash of light that actually occurred about 380,000 years after the Big Bang.</p> <p class="p2"> </p> <p class="p1"><em>How can we observe things that are receding from us at faster than the speed of light?<span class= "Apple-converted-space"> </span></em></p> <p class="p1">So, as is well understood by regular Cheap Astronomy listeners – and probably other astronomy podcast listeners, the Universe’s expansion has an additive effect over distance.</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 u