On this day in 1927 - March 1st - American astronomer George Abell was born.
Abell's catalogue of galaxy clusters from the Palomar Sky Survey remains an important piece of work. But in addition to being an active professional astronomer, he was a teacher, administrator, writer and science popularizer.
On this day in 2002 - March 1st - the European Space Agency (ESA) launched Envisat, the world's largest civilian Earth observation satellite.
Envisat's objective was to provide observational data complementary to European remote-sensing missions in order to improve environmental studies. Contact was lost in 2012 and Envisat is being replaced by the Sentinel series of satellites.
On this day in 1972 - March 2nd - NASA's Pioneer 10 was launched.
Pioneer 10 was the first spacecraft to cross the Asteroid Belt and to complete the first mission to Jupiter. It's now over 120 au from the Sun, heading out of the Solar System in the direction of the constellation Taurus.
On this day in 1923 - March 4th - Sir Patrick Moore, English amateur astronomer, writer and broadcaster, was born.
He was best known as the enthusiastic and knowledgeable presenter of the BBC TV program The Sky at Night, which he began in 1957. Although Sir Patrick is no longer with us, the program goes on and is the world's longest-running television series.
On this day in 2005 - March 5th - the European Space Agency's first deep space ground station was officially inaugurated.
The New Norcia facility in Western Australia was the first, but it's been joined by stations in Spain and Argentina. Deep space tracking stations are essential for missions such as Rosetta and Mars Express.
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