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Phases of the Moon

It takes the Moon around 27 days to orbit around the Earth, during this time we see the Moon go through a series of different shapes, known as the "phases" of the Moon. It takes around 29.5 days for the Moon to get back to exactly the same phase, this is a little longer than it takes it orbit the Earth, due to the fact that the Earth is also moving around the Sun at the same time.

More information on the orbit of the Moon, and why we see these different phases can be found here.

On the animation above you can see the Earth and Moon as seen from above, to the left, where the light from the Sun is coming from the right. On the right panel you can see what the Moon would look like from the surface of the Earth, and a "calendar" showing the days go by. To go to a particular time, move the mouse pointer over the day you want to see.


Please note that over the weekend of the 26-28th May 2017 we will be switching over to our brand new website - during this time there may be periods where the site is difficult to access, and users will be unable to request observations from the telescope. Please bear with us during this time. All should be back up and running by the 29th May 2017.