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Bookmark or Share- The Moon: your questions answered - Royal Museums GreenwichA blue moon, by folklore definition, is said to be the second full Moon of the month. However, researchers at Southwest Texas State University have been using historical documents to prove that a blue moon was really a term used by the Maine Farmers’ Almanac to indicate the presence of a 13th full Moon in a tropical year which usually had 12.
- Night sky highlights - August 2021 - Royal Museums Greenwich22 August: A blue moon. If you only go stargazing once in a blue moon, this is the time to do it! The 22nd of August will treat us to not only a full moon, but a blue one at that. The last blue moon we had coincidentally fell on Halloween of last year and was called ‘blue’ because it was the second full moon of October 2020. This August ...
- What would happen if the Moon disappeared?What would happen to the seasons if the Moon disappeared? Lastly and probably the most worrying, the Earth’s seasons could change substantially should the Moon disappear. We experience seasons on the Earth – spring, summer, autumn and winter - because the Earth is tilted. Relative to the plane we orbit the Sun, Earth’s tilt is about 23.5 ...
- What is a blue moon? - Royal Museums GreenwichThe traditional definition of a blue moon: seasonal. Which of the 13 full moons is the blue moon is up for debate. Traditionally the definition of a blue moon is the third full Moon in an astronomical season containing four full moons.
- What is a supermoon? - Royal Museums GreenwichThe distance between the Moon and the Earth varies, because the Earth is not right at the centre of the Moon’s orbit and the Moon’s orbit is not a circle (it’s an ellipse). The moment when the Moon is closest to the Earth is called a lunar perigee. When the Moon is furthest away it is known as a lunar apogee.
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