There are two methods for determining the absolute age of a rock, so-called radiochronology: The isochronous method The cosmogenic nuclide method These two methods are based on natural nuclear disintegration …
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As we said in the introduction, you have to prepare your observation before looking at the sky. At first it is not easy to recognize the stars and find the …
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During the night you will not only see stars in the sky but many other objects: The Moon: every month, for about 25 days, the Moon is visible in the …
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In the past it has happened that some meteorites are so big and so heavy that they violently hit the Earth forming huge craters several kilometers in diameter! In fact …
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Most asteroids orbit very far from the Earth, between Mars and Jupiter. Some debris however or dust released by the tail of comets can cross the Earth at the chance …
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