Science, Maths & Technology
Exomoons: astronomers report first ever discovery
...technique, in which a planet passing in front of its host star, along our line of sight, causes the star’s brightness to dim slightly (by around 1% for a Jupiter-sized planet orbiting a sun-sized star) once every orbit. So such a dip in a star’s brightness is a “light signature” of an exoplanet. Jupiter itself has over 70 moons, and four of these are comparable in...