23 February
2004: On 23 February 2004, the final pre-launch activity on the ESA Rosetta spacecraft took place.
02 FEAB. 2005
Dáta foilsithe
2575
Amhairc
1968: On 24 February 1968, the journal Nature carried the announcement of the discovery of pulsars.
The first pulsar was discovered by a graduate student, Jocelyn Bell, on 28 November 1967, then working under the direction of Professor A. Hewish.
This extraterrestrial pulsating radio source was observed at the Mullard Radio Astronomy Observatory, Cambridge University, United Kingdom. They were using a special radio telescope - a large array of 2048 aerials.
The discovery of these objects opened new horizons in studies as diverse as degenerate fluids, relativistic gravity and interstellar magnetic fields. Under extraordinary physical conditions, radiation is generated and pulses with a clock-like precision.
Modh meán
22 February
1824: On 22 February 1824, Pierre Jules-César Janssen was born.
20 February
1962: On 20 February 1962, US Marine Colonel John Glenn became the first American to orbit Earth.
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