. On this day in 1817 – June 26th – French astronomer Charles Messier was born in Badonviller in the Lorraine region of France.
Messier published an astronomical catalogue consisting of 110 nebulae and faint star clusters, which came to be known as the Messier objects. The purpose of the catalogue was to help astronomical observers distinguish between permanent and transient visually diffuse objects, like comets, in the sky.
Last edited by Mona - Astronomy; 06/27/2105:43 AM. Reason: Link added
. On this day in 1995 – June 28th – the first docking between the Soviet space station Mir and the United States Space Shuttle took place.
Daniel Goldin, chief of NASA, called it the beginning of “a new era of friendship and cooperation” between the U.S. and Russia. It helped to pave the way for the creation of the International Space Station.
. On this day in 1868 – June 29th – George Ellery Hale, American solar astronomer, was born.
Hale was a key figure in the realization of three major telescopes, the 40-inch refractor at Yerkes Observatory, 60-inch Hale and 100-inch Hooker reflectors at Mount Wilson Observatory, and the 200-inch Hale reflector at Palomar Observatory.
. On this day in 1908 – June 30th – an asteroid impact leveled hundreds of miles of Siberian forest around Tunguska.
The event is classified as an impact even, but is thought to have been caused by a meteoroid exploding above ground. No impact crater has ever been found. Since 2015, June 30th has been designated International Asteroid Day.
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