Portal:Astronomy/Did you know/1

... that 12th-century Muslim scientist Al-Khazini, who proposed a theory of gravitation long before Isaac Newton, was, in his early life, a slave of the Seljuq Turks?
... that Kepler-47c is a circumbinary planet orbiting in the habitable zone of Kepler-47, a binary star system?
... that two high school students used the automated telescope at Leuschner Observatory to record the earliest images of supernova SN 1994I?
... that the Kuiper crater in the Kuiper quadrangle, named after Dutch American astronomer Gerard Kuiper, has the highest albedo recorded on Mercury?
...that Mt. Olympus Mons on Mars is the highest peak in the solar system?