Science, Maths & Technology
Astronomy: images of the Universe
...change from one observation to another. Figure 19 shows two images of a galaxy taken 41 days apart. Can you spot the difference? It shouldn’t be difficult to spot the presence of a very bright ‘star’ in the second image, which has been further highlighted by a position indicator (a vertical and a horizontal bar). This is a supernova: the light comes from the...