Nov 8, 2025 · Henrietta Swan Leavitt, American astronomer known for her discovery of the relationship between period and luminosity in Cepheid variables, pulsating stars that vary …

Oct 27, 2025 · Astronomy is the study of objects and phenomena beyond Earth, whereas cosmology is a branch of astronomy that studies the origin of the universe and how it has …

Nov 5, 2025 · Benjamin Banneker (born November 9, 1731, Banneky farm [now in Oella], Maryland [U.S.]—died October 19? [see Researcher’s Note], 1806, Baltimore, Maryland, U.S.) …

Nov 16, 2025 · Edwin Hubble, American astronomer who played a crucial role in establishing the field of extragalactic astronomy and is generally regarded as the leading observational …

Nov 6, 2025 · Hipparchus (born, Nicaea, Bithynia [now Iznik, Turkey]—died after 127 bce, Rhodes?) was a Greek astronomer and mathematician who made fundamental contributions …

It includes scientists who received degrees in astronomy, who made significant contributions to the study of astronomy, or who built astronomical instruments, as well as those whose work in …

Oct 31, 2025 · Ptolemy was an astronomer, mathematician, and geographer who lived during the 2nd century CE. He is known for his geocentric (Earth-centred) model of the universe.

Nov 27, 2025 · Galileo was a natural philosopher, astronomer, and mathematician who made fundamental contributions to the sciences of motion, astronomy, and strength of materials and …

Nov 28, 2025 · Hypatia is famous for being the greatest mathematician and astronomer of her time, for being the leader of the Neoplatonist school of philosophy in Alexandria, for …

Nov 11, 2025 · Components of the Earth-orbiting International Space Station use a “dust bumper,” or Whipple shield (named for its inventor, the American astronomer Fred Whipple), to guard …