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OTD in Space – March 22: Comet Hale-Bopp Flies by Earth

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On March 22, 1997, a super bright comet by the name of Hale-Bopp made its closest approach to Earth. It was bright enough for people to see without telescopes or binoculars for over 18 months. Comet Hale-Bopp still holds the record for being visible to the naked eye for longer than any other comet, and it was probably the most-viewed comet in history. It passed by Earth at a safe distance of about 120 million miles before continuing its orbit around the sun. As it got closer to the sun, its two blue and white tails grew bigger and brighter. By the time it made it to the sun on April 1, it was shining brighter than every star in the sky except for Sirius.
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OTD in Space – March 7: NASA Launches Orbiting Solar Observatory
OTD in Space – March 26: U.S. Army Launches Explorer 3 Satellite
OTD in Space – March 12: NASA Launches Magnetospheric Multiscale Mission
OTD in Space – March 1: Scott Kelly Returns from a Year in Space
OTD in Space – March 24: Mercury-Redstone BD Rocket Launches on Uncrewed Test Flight
OTD in Space – March 29: Heinrich Olbers Discovers Asteroid Vesta
OTD in Space – March 23: First Photo of the Moon
OTD in Space – March 11: 1st Japanese Module & 'Dextre' Robot Launch to Space Station...
OTD in Space – March 30: SpaceX Launches & Lands Used Rocket in Historic 1st Reflight
OTD in Space – March 3: Apollo 9 Launches 1st Test Flight of Lunar Module
OTD in Space – March 22: Comet Hale-Bopp Flies by Earth
OTD in Space – March 28: Last Test Flight of NASA's Saturn 1 Rocket Booster
OTD in Space – March 2: Rosetta Spacecraft Launches to Comet 67P
OTD in Space – March 10: Rings Discovered at Uranus
OTD in Space – March 14: ExoMars Mission Launches to Search for Life on Mars
OTD In Space – March 12 NASA Launches Magnetospheric Multiscale Mission
OTD in Space – March 17: U.S. Launches Its Second Satellite, Vanguard 1
OTD in Space – March 19: Ionospheric Satellite Fails to Reach Orbit
OTD in Space – March 6: Vega 1 Flies by Halley's Comet
OTD in Space – March 13: Uranus Discovered!
OTD in Space – March 9: Soviet Union Launches Dummy, Dog and Guinea Pig into Space
OTD in Space – March 31: NASA Approves Gemini Spacecraft Design
OTD in Space – June 8: X-15 Makes First Glide Flight
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