What do you do after you’ve written the definitive biography of Galileo? You catalogue the lives of the lesser astronomers, of course.
What fossilised coral reefs can tell us about the length of the day in the deep past.
There was a lunar eclipse this morning and, by coincidence, Mars happens to be as close to earth as it's going to be for about thirty years. This offered a unique opportunity to capture both red objects in the sky at once.
On Skittles and the Precession of the Equinox.
Ptolemy was not Arabic, but his legendary treatise is known to us as the Almagest, which is a transliteration of its Arabic title al-mjsty; literally, The Magestic.