Year 13 Astronomy day at the Royal Greenwich Observatory
The final activity of the day was a lecture by Dr Olivia Johnson on – How black holes shape the universe. http://en.wikipedia.org/wiki/Black_hole A typical galaxy contains 100 billions of Suns and has a size of about 100000 light years. A galaxy cluster contains about 10 trillions of Suns and has a size of about 10 […]
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