Pluto, once considered the ninth planet of our solar system and now classified as a dwarf planet, continues to surprise scientists with...

Modern drawing of Aglaonice in the style of an ancient Attic Greek red-figure pyxis Alzinous, 2015. Aglaonice. Wikimedia Commons....

Henrietta Swan Leavitt was a historical astronomer. She studied period-luminosity relationships, particularly the period of luminosity in...