Radiachronology

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

Prepare Your Observation of The Sky

If you want to observe the sky with the naked eye and recognize the constellations or even observe the sky with the telescope, …

What do We See During the Night?

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 M…

The Fall of Meteorites

In the past it has happened that some meteorites are so big and so heavy that they violently hit the Earth forming huge craters…

Shooting Stars and Meteorites

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

Comets

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

The Blue Planet

Neptune is invisible to the naked eye. It was discovered in 1846 by Urbain Le Verrier because something disrupted the orbit of …