On This Day (1)
12th April 1817 death of Charles Messier
The French comet hunter who published his list of nebulae and clusters to avoid confusing them with comets. sadly most of his comets are forgotten but his Messier catalogue is famous today.
On This Day (2)
12th April 1851 birth of Edward Walter Maunder
An English astronomer best known for his work studying the Sun and the solar magnetic cycle that led to his identification of the period of no sunspots from 1645 to 1715 that is now known as the "Little Ice Age" or the Maunder Minimum.
On This Day (3)
12th April 1914 birth Adrian Blaauw
This Dutch astronomer was fundamental in the founding of the European Southern Observatory in 1962.
On This Day (4)
12th April 1961 Yuri Gagarin first man in space.
The first person in space was the Russian cosmonaut Yuri Gagarin in his Vostok space craft.