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Why Are Craters Always Round?

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If you take a look at all the impact craters in our solar system, the vast majority are nice, neat circles. But why? Meteorites and asteroids strike planets and moons at all sorts of angles. Where are all the elliptical craters?

Hosted by: Savannah Geary (they/them)

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Sources:
https://www.sciencefocus.com/space/why-are-impact-craters-always-circular/
https://www.britannica.com/science/meteor/
https://www.scientificamerican.com/article/why-are-impact-craters-al/
https://www.science.org/content/article/ancient-craters-mars-reveal-how-planet-s-tilt-has-changed-over-time
https://arxiv.org/ftp/arxiv/papers/1904/1904.08446.pdf
https://www.sciencedirect.com/science/article/pii/S003206331630157X
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JE004477
https://astronomy.com/magazine/ask-astro/2011/12/crater-shapes
https://www.sciencedirect.com/science/article/abs/pii/S0019103511004064

Images:
https://www.nasa.gov/multimedia/imagegallery/image_feature_25.html
https://commons.wikimedia.org/wiki/File:Aneirin_crater_MESSENGER_WAC_mosaic.jpg
https://www.flickr.com/photos/edsweeney/4111291263/
https://commons.wikimedia.org/wiki/File:Comet_NEOWISE_and_meteor.jpg
https://www.flickr.com/photos/edsweeney/4111291263/
https://www.gettyimages.com/detail/video/young-boy-playing-in-a-muddy-sand-pit-stock-footage/665924230?adppopup=true
https://www.gettyimages.com/detail/video/asteroid-impact-on-earth-asteroid-comet-meteorite-glows-stock-footage/1400382484?adppopup=true
https://www.nasa.gov/mission_pages/LRO/multimedia/lroimages/lroc-20110719-messier.html
https://photojournal.jpl.nasa.gov/catalog/PIA04729
https://www.youtube.com/watch?v=-IAcwLYYFGk&t=1759s&ab_channel=NASAJetPropulsionLaboratory
https://commons.wikimedia.org/wiki/File:Barringer_Crater_aerial_photo_by_USGS.jpg
https://www.nasa.gov/content/elliptical-crater-on-mercury
https://www.nasa.gov/mission_pages/messenger/multimedia/messenger_orbit_image201200206_1.html
https://www.nasa.gov/mission_pages/messenger/multimedia/messenger_orbit_image20111023_1.html
https://www.youtube.com/watch?v=vTr3VdGlFr8&t=186s&ab_channel=NASAGoddard
https://sci.esa.int/web/mars-express/-/38544-elliptical-impact-crater-in-hesperia-planum
https://www.gettyimages.com/detail/video/solar-system-with-eight-planets-and-their-orbits-3d-stock-footage/1396306085?adppopup=true
https://www.nasa.gov/jpl/herschel/dwarf-planet-ceres-pia17830
https://mars.nasa.gov/resources/22477/the-changing-surface-of-mars/
https://www.jpl.nasa.gov/images/pia15095-changes-in-tilt-of-mars-axis
https://climate.nasa.gov/news/2948/milankovitch-orbital-cycles-and-their-role-in-earths-climate/
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