The new picture, taken by the Hubble Space telescope, suggests the Nebula is actually cylindrical in shape and that from Earth we see it almost on end, so it looks like a circle. The Nebula was first ...
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The Tycho supernova's hidden secret
In November 1572, a brilliant new star appeared in the constellation Cassiopeia, shining so brightly that it was visible during the day. Danish astronomer Tycho Brahe carefully documented this ...
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