14 April
1629: On 14 April 1629, Christiaan Huygens was born.Shortly after Galileo had first used a telescope for astronomical purposes, many other scientists decided to use this new instrument to perform ...
31 DÉC. 2003
Date de publication
2342
Vues
2002: On 15 April 2002, the European Space Agency reported that two asteroids had passed close by Earth, at distances of 1.2 and 3 times the distance to the Moon.
By monitoring known asteroids, astronomers can predict which may collide with Earth. ESA continues to study ways in which its missions can assist in monitoring unseen but potentially hazardous asteroids.
A discovery, made using data from ESA's Infrared Space Observatory (ISO), showed that there could be nearly two million asteroids larger than one kilometre in the main asteroid belt, between Mars and Jupiter.
When the asteroids remain in the main-belt, they pose no danger to Earth. However, they can be thrown into different orbits by collisions with other asteroids or by the influence of Jupiter's gravitational field. If their new orbits cross the Earth's orbit, they could one day collide with our planet.
Modal média
13 April
1999: On 13 April 1999, after 22 trips into space, Spacelab - Europe's first step into human spaceflight - returned to Europe.Two Spacelab flight units were built and the laboratory ...
12 April
1961: On 12 April 1961, at just after 09:00 Moscow time, Russian test pilot Yuri Gagarin was launched into space from the Soviet Union's top-secret rocket base in Baikonur.After one ...
11 April
2001: On 11 April 2001, ESA signed a treaty with the French government concerning the future of the Guiana Space Centre (CSG), Europe's Spaceport in French Guiana.The agreement extended the ...
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