The Sun in the centre

The Sun in the centre

ABOVE: To us, it is obvious that the Sun is the centre of the Solar System. But it wasn’t so clear to everyone thousands of years ago. Image courtesy NASA/JPL-Caltech. Article by David Ellyard WHO FIRST PROPSED THAT THE SUN, rather than the Earth, lay at the centre of...
Father, son and the changing universe

Father, son and the changing universe

ABOVE: By tracking sunspots, David and Johannes Fabricius showed that the Sun rotates — another nail in the coffin for an unchanging universe. Credit: NASA/SDO/HMI. By David Ellyard WHEN WE THINK OF THE PEOPLE who started modern astronomy, 400 or 500 years ago —...