Uploaded April 2021 | Updated September 2026, 2 weeks ago
You may have heard of the first interstellar object observed in our solar system, but did you know there's more than one? And speaking of icy rocks, new research suggests the ocean under the icy crust of Enceladus could be more dynamic than we first thought!
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Hosted by: Hank Green
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Sources:
eso.org/public/news/eso2106
press.springernature.com/unusual-polarimetric-properties-for-interstellar-comet-2i-boriso/18966422
doi.org/10.1038/s41550-021-01336-w
doi.org/10.1038/s41467-021-22000-x
https://www.caltech.edu/about/news/ocean-currents-predicted-on-enceladus
nature.com/articles/s41561-021-00706-3
Image Sources:
hubblesite.org/contents/media/images/2019/53/4578-Image
nasa.gov/image-feature/jpl/pia20645/protoplanetary-disk
svs.gsfc.nasa.gov/11541
commons.wikimedia.org/wiki/File:Comet_Hale-Bopp_1995O1.jpg
commons.wikimedia.org/wiki/File:Orion_Watches_over_Paranal_-_potw2009a.jpg
solarsystem.nasa.gov/resources/17737/enceladus-plume
jpl.nasa.gov/images/bursting-at-the-seams-the-geyser-basin-of-enceladus
nasa.gov/multimedia/imagegallery/image_feature_1243.html
solarsystem.nasa.gov/resources/17646/enceladus-hydrothermal-activity
You may have heard of the first interstellar object observed in our solar system, but did you know there's more than one? And speaking of icy rocks, new research suggests the ocean under the icy crust of Enceladus could be more dynamic than we first thought!
This video was sponsored by Skillshare. The first 1000 people to use the link will get a free trial of Skillshare Premium Membership: http://skl.sh/scishowspace04211
Hosted by: Hank Green
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at scishowtangents.org
----------
Support SciShow Space by becoming a patron on Patreon: patreon.com/SciShowSpace
----------
Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:
Silas Emrys, Charles Copley, Drew Hart, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Christopher R Boucher, Eric Jensen, Lehel Kovacs, Adam Brainard, Greg, GrowingViolet, Ash, Laura Sanborn, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: dftba.com/scishow
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Twitter: twitter.com/scishow
Tumblr: scishow.tumblr.com
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Sources:
eso.org/public/news/eso2106
press.springernature.com/unusual-polarimetric-properties-for-interstellar-comet-2i-boriso/18966422
doi.org/10.1038/s41550-021-01336-w
doi.org/10.1038/s41467-021-22000-x
https://www.caltech.edu/about/news/ocean-currents-predicted-on-enceladus
nature.com/articles/s41561-021-00706-3
Image Sources:
hubblesite.org/contents/media/images/2019/53/4578-Image
nasa.gov/image-feature/jpl/pia20645/protoplanetary-disk
svs.gsfc.nasa.gov/11541
commons.wikimedia.org/wiki/File:Comet_Hale-Bopp_1995O1.jpg
commons.wikimedia.org/wiki/File:Orion_Watches_over_Paranal_-_potw2009a.jpg
solarsystem.nasa.gov/resources/17737/enceladus-plume
jpl.nasa.gov/images/bursting-at-the-seams-the-geyser-basin-of-enceladus
nasa.gov/multimedia/imagegallery/image_feature_1243.html
solarsystem.nasa.gov/resources/17646/enceladus-hydrothermal-activity



![What Saturn’s Rings Tell Us About Its Soupy Core
This episode is sponsored by Endel, an app that creates personalized soundscapes to help you focus, relax and sleep.The first 100 people to sign up here get a one week free trial: https://app.adjust.com/b8wxub6?campaign=scishowspace_august&adgroup=youtube
The insides of the our gas giant friend, Saturn, might be less of a mystery now that we’ve figured out how to use its rings to indicate its internal makeup. And the light emitted from some very old, very hungry black holes could be giving us a new way to measure some of the heaviest objects in space.
Hosted By: Hank Green
SciShow has a spinoff podcast! Its called SciShow Tangents. Check it out at http://www.scishowtangents.org
Support SciShow Space by becoming a patron on Patreon: https://www.patreon.com/SciShowSpace
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Sources:
https://doi.org/10.1038/s41550-021-01448-3 https://authors.library.caltech.edu/109256/3/2104.13385.pdf]
https://www.caltech.edu/about/news/saturn-makes-waves-in-its-own-rings
https://www.technologyreview.com/2021/08/16/1031996/saturn-core-insides-sloshing-rings-cassini/
https://baas.aas.org/pub/2020n6i513p06/release/1
https://arxiv.org/abs/1407.6702?context=astro-ph
https://science.sciencemag.org/content/373/6556/789
https://www.eurekalert.org/news-releases/924988
https://www.eurekalert.org/news-releases/924845
Image Sources:
https://en.wikipedia.org/wiki/File:Saturn_during_Equinox.jpg
https://www.istockphoto.com/photo/structure-core-earth-structure-layers-of-the-earth-the-structure-of-the-earths-crust-gm962321406-262821721
https://mars.nasa.gov/resources/22118/insight-on-mars/
https://www.jpl.nasa.gov/images/gas-giants-form-quickly-artist-concept
https://www.nasa.gov/feature/jpl/nasa-juno-mission-prepares-for-december-11-jupiter-flyby
https://www.nasa.gov/mission_pages/cassini/multimedia/pia14944.html
https://solarsystem.nasa.gov/resources/17849/translucent-arcs/?category=planets_saturn
https://solarsystem.nasa.gov/resources/13904/saturns-outer-c-ring/
https://solarsystem.nasa.gov/resources/17631/saturn-interior-cutaway-illustration/
https://www.caltech.edu/about/news/saturn-makes-waves-in-its-own-rings
https://www.nasa.gov/feature/jpl/found-most-distant-black-hole
https://www.nasa.gov/image-feature/jpl/pia21086/galaxy-ngc-1448-with-active-galactic-nucleus
https://svs.gsfc.nasa.gov/13326
https://www.nasa.gov/feature/goddard/2021/new-nasa-visualization-probes-the-light-bending-dance-of-binary-black-holes
https://www.nasa.gov/multimedia/imagegallery/image_feature_468.html
https://www.nasa.gov/vision/universe/starsgalaxies/black_hole_description.html What Saturn’s Rings Tell Us About Its Soupy Core](https://i.ytimg.com/vi/wJ-nkYNhR8k/mqdefault.jpg)


![Why Did We Keep Sealed Moon Samples?
Our friends at MinuteEarth just released a new book! To check out “How Did Whales Get So Big?” head to: https://www.minuteearth.com/books/
We’ve been sitting on samples of the lunar surface for decades and, with better technology than when they were taken, we are opening them back up to take another look!
Hosted By: Hank Green
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Support SciShow Space by becoming a patron on Patreon: https://www.patreon.com/SciShowSpace
Huge thanks go to the following Patreon supporter for helping us keep SciShow Space free for everyone forever: GrowingViolet, Jason A Saslow, Heriberto Bustos, and David Brooks!
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Sources:
https://curator.jsc.nasa.gov/education/_documents/what%20we%27ve%20learned%20about%20the%20moon.pdf [PDF]
https://www.lpi.usra.edu/ANGSA/news/ANGSA-Lessons-Learned-Final-September_1_2021.pdf [PDF]
https://www.hou.usra.edu/meetings/lpsc2021/pdf/lpsc2021_program.htm
https://www.jstor.org/stable/30059009
https://pubs.geoscienceworld.org/gsa/gsabulletin/article/72/10/1493/5246/devitrification-of-natural-glass
https://pubs.er.usgs.gov/publication/70013895
https://arxiv.org/abs/1205.5597
http://articles.adsabs.harvard.edu//full/1971LPSC....2..645C/0000645.000.html
https://astronomy.com/news/2019/05/giant-impact-hypothesis-an-evolving-legacy-of-apollo
https://www.theatlantic.com/science/archive/2019/02/moon-rock-thief-thad-roberts/582757/
https://www.space.com/13878-nasa-apollo-moon-rocks-misplaced-lost-report.html
https://www.orlandosentinel.com/space/apollo-11-anniversary/os-ne-apollo-11-what-happened-to-moon-rocks-20190625-nw443tpnsva4zco2x75fzxoftu-story.html
https://www.lpi.usra.edu/lunar/strategies/KleinhenzEtAl_NASA-TM-20205008626_ISRU%20MeasurementStudy.pdf [PDF]
https://www.nasa.gov/press-release/nasa-s-sofia-discovers-water-on-sunlit-surface-of-moon
Image Sources:
https://commons.wikimedia.org/wiki/File:Apollo_15_flag,_rover,_LM,_Irwin.jpg
https://commons.wikimedia.org/wiki/File:Lunar_Regolith_70050_from_Apollo_17_in_National_Museum_of_Natural_History.jpg
https://www.nasa.gov/feature/nasas-exploration-plans-include-living-off-the-land
https://commons.wikimedia.org/wiki/File:Apollo_11_Lunar_Core_Sample_10005.jpg
https://commons.wikimedia.org/wiki/File:Lunar_sample_70017_photo_S73-15720.jpg
https://commons.wikimedia.org/wiki/File:Artist%27s_concept_of_collision_at_HD_172555.jpg
https://commons.wikimedia.org/wiki/File:Moon Giant_Impact_Hypothesis Simple_model.png
https://commons.wikimedia.org/wiki/File:Lunar_Olivine_Basalt_15555_from_Apollo_15_in_National_Museum_of_Natural_History.jpg
https://commons.wikimedia.org/wiki/File:The_Moon_Luc_Viatour.jpg
https://commons.wikimedia.org/wiki/File:LPnosunm.jpeg
https://commons.wikimedia.org/wiki/File:Clementine_Deployed.png
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https://www.youtube.com/watch?v=l2CfQV0UCAk
https://commons.wikimedia.org/wiki/File:Apollo_11_Moon_rocks_1.jpg
https://www.nasa.gov/feature/nasa-opens-previously-unopened-apollo-sample-ahead-of-artemis-missions
https://www.youtube.com/watch?v=7AFMj66tNfw&t=26s
https://www.nasa.gov/feature/nasa-selects-teams-to-study-untouched-moon-samples
https://www.istockphoto.com/photo/chain-of-amino-acid-or-bio-molecules-called-protein-3d-illustration-gm1225652892-360843001
https://science.nasa.gov/science-news/science-at-nasa/2008/10apr_moondustinthewind
https://commons.wikimedia.org/wiki/File:Mooncolony.jpg Why Did We Keep Sealed Moon Samples?](https://i.ytimg.com/vi/won5F5ZfIuU/mqdefault.jpg)



