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When we look outward into space, we\\u2019re looking backwards in time. That\\u2019s because light moves, at the speed of light. It takes time for the light to reach us.

But it gets even stranger than that. Light can be absorbed, reflected, and re-emitted by gas and dust, giving us a second look.

They\\u2019re called light echoes, and allow astronomers another way to understand the Universe around us.

Audio Podcast version:
\\nITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2
\\nRSS: https://www.universetoday.com/audio

What Fraser\'s Watching Playlist:
\\nhttps://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G

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Team: Fraser Cain - @fcain / frasercain@gmail.com
\\nKarla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw
\\nChad Weber - weber.chad@gmail.com

References:
\\nhttps://www.nasa.gov/feature/jpl/arecibo-radar-returns-with-asteroid-phaethon-images
\\nhttps://www.nasa.gov/mission_pages/LRO/multimedia/lroimages/lroc-20100413-apollo15-LRRR.html
\\nhttps://www.spacetelescope.org/videos/heic0617a/
\\nhttps://www.nasa.gov/feature/jpl/light-echoes-give-clues-to-protoplanetary-disk
\\nhttps://www.nasa.gov/feature/goddard/2019/nasa-s-nicer-mission-maps-light-echoes-of-new-black-hole
\\nhttps://hubblesite.org/contents/news-releases/2017/news-2017-42.html
\\nhttps://www.eso.org/public/images/potw1814a/

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