RAS Library (@astro_librarian) 's Twitter Profile
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@astro_librarian

The Royal Astronomical Society has a world-class library & archive collection in astronomy and geophysics. Follow @RoyalAstroSoc for general RAS news.

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linkhttps://ras.ac.uk/library calendar_today30-08-2012 14:42:30

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5 years ago

It's #NAW2020, focusing on Mars. Johannes Kepler analysed Tycho Brahe's observations of Mars, and discovered that the orbit is an ellipse, one of the laws of planetary motion which he published in in Astronomia Nova (1609).

It's #NAW2020, focusing on Mars. Johannes Kepler analysed Tycho Brahe's observations of Mars, and discovered that the orbit is an ellipse, one of the laws of planetary motion which he published in in Astronomia Nova (1609).