This Amazing Mission Almost Failed After Launch
Go to http://curiositystream.com/space to start streaming "Space Probes." Use the promo code "space" during the sign-up process to get your first 31 days free. The ESA Hipparcos team worked for 20 years on the project, then had to watch as the mission ALMOST failed! But somehow, they turned it around, and today, this little-known mission has totally transformed what we know about space. Hosted by: Reid Rimers SciShow has a spinoff podcast! It s called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Matt Curls, Sam Buck, Christopher R Boucher, Avi Yashchin, Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- 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: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://sci.esa.int/web/hipparcos/-/47357-fact-sheet https://sci.esa.int/web/hipparcos/-/31905-about-the-mission https://www.cosmos.esa.int/web/hipparcos/scientific-goals http://www.astronomy.com/news/2005/01/hipparchuss-sky-catalog-found https://www.cosmos.esa.int/documents/532822/546213/vol2_all.pdf/39073ea4-8e7a-4b07-8094-6ce046f0e4db https://wwwhip.obspm.fr/heritage/hipparcos/SandT/hip-SandT.html https://www.spenvis.oma.be/help/background/soldam/soldam.html http://adsabs.harvard.edu/abs/1997A&A...323L..49P https://doi.org/10.1051/0004-6361:20078357 http://adsabs.harvard.edu/abs/1997A&A...323L..57H http://adsabs.harvard.edu/abs/2000A&A...355L..27H https://arxiv.org/pdf/astro-ph/9707107.pdf https://iopscience.iop.org/article/10.1086/305201 https://www.cosmos.esa.int/documents/532822/553347/feast_ceph.pdf/9cf31b5f-dc80-454c-b547-338dc973fc59 Planck: https://arxiv.org/abs/1807.06209 SL9: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/7C7A50945B166FCC28D197F3A53EB2D5/S025292110011543Xa.pdf/orbital_motion_and_impact_circumstances_of_comet_shoemakerlevy_9.pdf https://nssdc.gsfc.nasa.gov/planetary/impact.html Other discoveries: https://iopscience.iop.org/article/10.1086/300364 https://www.cosmos.esa.int/web/hipparcos/poster https://arxiv.org/abs/astro-ph/9707253 https://www.cosmos.esa.int/documents/532822/553347/aa_letter.pdf/93714a5a-c3d2-4a1f-8a9d-53ecbb909f52 Image Sources: https://commons.wikimedia.org/wiki/File:Hipparcos-testing-estec.jpg https://commons.wikimedia.org/wiki/File:The_Blue_Marble_4463x4163.jpg https://commons.wikimedia.org/wiki/File:Observatory_in_Alexandria_at_the_Time_of_Hipparchus.jpg https://svs.gsfc.nasa.gov/3951 https://en.wikipedia.org/wiki/File:The_globular_cluster_NGC_6388,_observed_by_Hubble.jpg https://apod.nasa.gov/apod/ap130909.html https://svs.gsfc.nasa.gov/12900 https://www.istockphoto.com/photo/cloud-typologies-night-sky-milky-way-gm879837540-245198742 https://www.flickr.com/photos/gsfc/8517114274 https://www.videoblocks.com/video/fly-through-outer-space-nebula-and-stars-animated-background-b5c6fktyeizjo797m https://solarsystem.nasa.gov/resources/2471/comet-shoemaker-levy-9-jupiter-impact-visualization/
