Astronomy Cast Ep. 669: Challenges to Dark Energy

<p><a href= "https://www.youtube.com/watch?v=5_1L_P24gT4">https://www.youtube.com/watch?v=5_1L_P24gT4</a></p> <p><strong>Streamed live on Feb 6, 2023.</strong></p> <p>It’s been over 20 years since astronomers first discovered that the expansion of the Universe is accelerating thanks to dark energy. And in these decades, astronomers still don’t have much evidence for what could be causing the increased expansion rate. Maybe there’s something else going on to explain it.</p> <p> </p> <p><strong>This video was made possible by the following Patreon members:</strong></p> <p>David</p> <p>Burry Gowen</p> <p>Jeanette Wink</p> <p>Stephen Veit</p> <p>Jordan Young</p> <p>Venkatesh Chary</p> <p>Andrew Poelstra</p> <p>Brian Cagle</p> <p>David Truog</p> <p>Gerhard Schwarzer</p> <p><strong>THANK YOU! - Fraser and Dr. Pamela</strong></p> <p> </p> <p>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>Just visit: <a href= "https://www.patreon.com/365DaysOfAstronomy">https://www.patreon.com/365DaysOfAstronomy</a> and donate as much as you can!</p> <p>Share the podcast with your friends and send the Patreon link to them too!<span class="Apple-converted-space"> </span></p> <p>Every bit helps! Thank you!</p> <p>------------------------------------</p> <p>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><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>Thank you! (Haven't donated? It's not too late! Just <a href= "http://cosmoquest.org/Donate">click</a>!)</p> <p>------------------------------------</p> <p>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