In terms of nuclear reactions, two mechanisms make it possible to produce cosmogenic nuclides: The spallation The muonic capture The

In addition to long-life radionuclides, a number of short-life radionuclides were present in the primitive solar system. Most of them

There are two methods for determining the absolute age of a rock, so-called radiochronology: The isochronous method The cosmogenic nuclide

In the past it has happened that some meteorites are so big and so heavy that they violently hit the

Most asteroids orbit very far from the Earth, between Mars and Jupiter. Some debris however or dust released by the

From time to time we see comets in the sky. Like asteroids, they are large, dusty, icy rocks several hundred

225088 Gonggong (2007 OR10) discovered on January 8, 2005 by Michael Brown and his team thanks to the 1.26 m telescope

Until 2006 it was the last planet of the solar system. It belongs today to the family of the dwarf