. On this day in 1968 – February 24th – the discovery of the first pulsar was announced.
A pulsar is a fast-rotating neutron star that emits a beam of electromagnetic radiation. We can only detect it when it's pointing towards us, rather like a lighthouse, so it seems to pulse. A neutron star is the remnant of a massive star following the collapse of its core in a supernova explosion.
. On this day in 1670 – February 25th – German astronomer Maria Margarethe Kirch (née Winckelmann) was born in Panitzsch near Leipzig.
Maria made extensive observations and published accounts of them. She was the first woman now known to have been the co-discoverer of a comet. However, her husband – a well known astronomer – was given the credit.
. On this day in 1897 – February 27th – French astronomer Bernard Lyot was born.
Bernard Lyot's work brought him major international awards. His most important contributions to astronomy were in solar observing, especially the invention of the coronagraph which makes it possible to observe the Sun's corona without waiting for a total eclipse.
. On this day in 2007 – February 28th – the New Horizons spacecraft flew past Jupiter en route to Pluto.
New Horizons made over 700 observations of the Jovian system, but the main reason for the flyby was to carry out a gravity assist maneuver. That boosted the speed of the spacecraft to get it to Pluto five years earlier than it would have otherwise.
. 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 1972 – March 2nd – NASA's Pioneer 10 was launched.
Pioneer 10 was the first spacecraft to cross the Asteroid Belt and to carry out the first mission to Jupiter. It's now almost 128 AU from Earth, heading out of the Solar System in the direction of the constellation Taurus.
We take forum safety very seriously here at BellaOnline. Please be sure to read through our Forum Guidelines. Let us know if you have any questions or comments!