1905: On 2 January 1905, Argentinian astronomer Charles Perrine discovered Elara, then the twelfth of Jupiter's known satellites.
It orbits 11 737 000 kilometres from Jupiter and has a diameter of 76 kilometres.
Leda, Himalia, Lysithea and Elara may be the remnants of a single asteroid that was captured by Jupiter and broken up. In mythology, Elara was the mother by Zeus of the giant Tityus.
Media modal
1959: On 2 January 1959, the USSR launched Lunik I in an attempt to hit the Moon. The spacecraft missed the Moon and was flung out into space by the Moon's gravity. It became the first man-made object to achieve an orbit around the Sun.
Media modal
30 December
stay updated
Subscribe to our newsletter to receive the latest news, mission updates, and exclusive insights directly in your inbox. Be the first to know about our upcoming projects and breakthroughs.