The Sun http://openlearn.open.ac.uk/course/view.php?id=2453 The Sun
Open University (UK) free online access to course materials. (5 hours)
For astronomers, the Sun is fascinating because it is our nearest star. By studying the Sun, they can gain an insight into the workings of the other millions of stars that are visible in the night sky....
Sun, Moon and Earth http://tinyurl.com/jh97a Sun, Moon and Earth
The sun is at the centre of our solar system. It is a star which gives us both heat and light. The earth is a planet and it orbits the sun.
The moon is a satellite and it orbits the earth.
The sun, moon and earth are all more or less spherical; the earth and the moon are moving all the time around the sun. To us on earth it does not always seem to be so. The moon seems to change shape and the sun appears to move across the sky.
By doing the following tasks you will see why!