16 February
2004: On 16 February 2004, ESA announced that an international team of astronomers may have set a new record in discovering what is the most distant known galaxy in the Universe.
02 HELMI. 2005
Julkaisupäivä
2040
Katselukerrat
1723: On 17 February 1723, Johann Tobias Mayer was born.
Mayer was a German astronomer who developed lunar tables that greatly assisted navigators in determining longitude at sea. Mayer also discovered the 'libration' (or apparent wobbling) of the Moon.
Mayer began calculating lunar and solar tables in 1753 and in 1755 he sent them to the British government. These tables were good enough to determine longitude at sea with an accuracy of half a degree.
Mayer's method of determining longitude by lunar distances and a formula for correcting errors in longitude due to atmospheric refraction were published in 1770. He died on 20 February 1762.
Mediamodaali
13 February
1852: On 13 February 1852, Johan Ludvig Emil Dreyer was born.
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