A sunspot observation was made on 17 March 807 AD by the Benedictine monk Adelmushttp://en.wikipedia.org/wiki/Sunspot#Early_observations
Equilux (equal length of day and night) for Scotland (high northern latitudes)http://en.wikipedia.org/wiki/Equinox
The Romans celebrated Liberalia, the festival of Liber Pater and his consort Libera, on 17 March.http://en.wikipedia.org/wiki/LiberaliaSaint Patrick's Day is a cultural and religious holiday celebrated on 17 March.http://astronomy.activeboard.com/t41761155/st-patricks-day/Ugandan cult mass murder and suicide in 2000http://en.wikipedia.org/wiki/Movement_for_the_Restoration_of_the_Ten_Commandments_of_God
On March 17, 1963, Mount Agung erupted, sending debris 8 - 10 km into the air and generating massive pyroclastic flows.http://astronomy.activeboard.com/t41733617/mount-agung/
The discovery of Californium was announced on the 17th March, 1950.http://astronomy.activeboard.com/t41758856/californium/
On 17 March 1966, the Alvin submersible was used to locate a lost 1.45-megaton hydrogen bombhttp://astronomy.activeboard.com/t41759823/the-1966-palomares-b-52-crash/On 17 March 1959 USS Skate (SSN-578) surfaced at the North Polehttp://en.wikipedia.org/wiki/USS_Skate_(SSN-578)#Operational_history
Vanguard 1 was launch in 1958http://en.wikipedia.org/wiki/Vanguard_1Soyuz TM-14 was launched on the 17th March 1992http://en.wikipedia.org/wiki/Soyuz_TM-14The Gravity Recovery And Climate Experiment (GRACE) mission was launched in 2002http://astronomy.activeboard.com/t13854639/grace/
An H-IIA rocket from Tanegashima, Japan with IGS Radar 5 was launched in 2017https://www.youtube.com/watch?v=TgCRZQwGtuE
Thomas Kenneth "Ken" Mattingly II, (born March 17, 1936) is a retired American astronauthttp://en.wikipedia.org/wiki/Ken_MattinglyJames Benson Irwin (March 17, 1930 - August 8, 1991) was an American astronaut http://en.wikipedia.org/wiki/James_IrwinDavid Beaumont Peakall (17 March 1931 - 18 August 2001) was an internationally recognised toxicologist.http://en.wikipedia.org/wiki/David_PeakallJohn Lewis Heilbron, born 17 March 1934, is an American historian of science http://en.wikipedia.org/wiki/John_L._HeilbronHenry Chamberlain Russell (17 March 1836 - 22 February 1907) was an Australian astronomer and meteorologist. http://astronomy.activeboard.com/t53010934/henry-chamberlain-russell-1836-1907/William Yolland (17 March 1810 - 5 September 1885) was an English military surveyor, astronomer and engineerhttp://en.wikipedia.org/wiki/William_YollandSir Thomas Maclear (17 March 1794 - 14 July 1879) was an Irish-born South African astronomer http://astronomy.activeboard.com/t53010911/thomas-maclear-1794-1879/
NGC 2560 was discovered by Heinrich Louis d'Arrest on the 17th March 1862.http://astronomy.activeboard.com/t57032327/ngc-2560/
NGC 2693 was discovered by William Herschel on the 17th March 1790.http://astronomy.activeboard.com/t63309586/ngc-2693/NGC 2860 was discovered by Edouard Jean-Marie Stephan on the 17th March 1884.http://astronomy.activeboard.com/t57032324/ngc-2860/NGC 3304 was discovered by William Herschel on the 17th March 1787.http://astronomy.activeboard.com/t57032318/ngc-3304/NGC 3334 was discovered by William Herschel on the 17th March 1787.http://astronomy.activeboard.com/t57032314/ngc-3334/NGC 4151 was discovered by William Herschel on the 17th March 1787.http://astronomy.activeboard.com/t13012706/ngc-4151/Messier 99 was discovered by Pierre François André Méchain on the 17th March 1781.http://astronomy.activeboard.com/t12482794/ngc-4254/NGC 4814 was discovered by William Herschel on the 17th March 1790.http://astronomy.activeboard.com/t57032293/ngc-4814/NGC 4833 was discovered by Nicholas Louis de Lacaille on the 17th March 1752.http://astronomy.activeboard.com/t49045008/ngc-4833/NGC 5030 was discovered by Edward Singleton Holden on the 17th March 1881.http://astronomy.activeboard.com/t57032278/ngc-5030/NGC 5031 was discovered by Edward Singleton Holden on the 17th March 1881.http://astronomy.activeboard.com/t57032271/ngc-5031/NGC 5035 was discovered by Edward Singleton Holden on the 17th March 1881.http://astronomy.activeboard.com/t57032268/ngc-5035/NGC 5107 was discovered by William Herschel on the 17th March 1787.http://astronomy.activeboard.com/t57032266/ngc-5107/
The discovery of exoplanet COROT-9b was announced on the 17 March 1899 http://en.wikipedia.org/wiki/COROT-9b#DiscoveryPhoebe was discovered by William Henry Pickering on 17 March 1899http://astronomy.activeboard.com/t2882358/phoebe/Asteroid (363) Padua was discovered by Auguste Charlois on March 17, 1893http://en.wikipedia.org/wiki/363_PaduaAsteroid (16) Psyche was discovered by Annibale de Gasparis on March 17, 1852http://en.wikipedia.org/wiki/16_PsycheBright Explosion on the Moon recorded on March 17th 2013.
MeteoritesThe Gyokukei (OC) meteorite fell in Cholla-namdo, South Korea, on the 17th March, 1930.http://astronomy.activeboard.com/t48309521/gyokukei-meteorite/