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In this Astronomy On-Line Shop you will find a variety of intriguing astronomical exercises.
These exercises are somewhat more demanding than those at the basic level. It is expected that you know some of the basic facts about astronomy before you try your skills on them. They are probable best for the 15 - 16 age group.
Just click on the titles to access the individual exercises and to try your skills!
Use the photographs and drawings from the recent Lunar Eclipse to determine the Moon's diameter and also its distance from the Earth. Several methods are explained, some of which are quite easy.
Did you observe the lunar eclipse on September 27, 1996? Even if you did not, you may have thought about how astronomers calculate the circumstances of such an eclipse in advance. In this connection, an important aspect is the duration of an eclipse. Here you will learn to perform the related calculations.
Study the motion of the Earth, as it goes around the Sun. Learn about the Zodiac!
Here is a detailed exercise with explanations based on observations made by Astronomy On-Line groups during the partial solar eclipse that took place on October 12, 1996.
Measure the size of lunar craters and learn about impact formations on the Earth and on the Moon.
This exercise concerns a very basic type of measurement. You will learn about the way this is done from an observatory in France (CERGA) and be astonished how good the accuracy really is!
However, if you think they are too simple for you, why don't you pass on to the Advanced Level?