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Table of Astronomy, from Cyclopaedia: or, An Universal Dictionary of Arts and Sciences, Volume 1, p 164, London, 1728


A team of astronomers using the Hubble Space Telescope found an unambiguous link between the presence of supermassive black holes that power high-speed, radio-signal-emitting jets and the merger history of their host galaxies. Almost all galaxies with the jets were found to be merging with another galaxy, or to have done so recently


The Nebra sky disk is a bronze disk of around 30 cm diameter, with a blue-green patina and inlaid with gold sun, moon and stars. The disk was found near Nebra, Germany, and dated to c. 1600 BC. Its style is unlike any known artistic object from its period.

from Smithsonian

Hypatia, Ancient Alexandria’s Great Female Scholar

"The mathematician and philosopher Hypatia of Alexandria was the daughter of the mathematician Theon Alexandricus (ca. 335–405) [the] last librarian of the Library of Alexandria. Around AD 400, she became head of the Platonist school at Alexandria. She taught philosophy and astronomy. The pupils included pagans, Christians, and foreigners. Murdered by a Christian mob after being accused of witchcraft and godlessness and of causing religious turmoil."

The Universe has undergone so much change over its 13.7 billion-year history. Take a journey through our great cosmic timeline.

The Universe has undergone so much change over its 13.7 billion-year history. Take a journey through our great cosmic timeline.


This visualization shows a timeline for the history of our planet earth.


This ancient Chinese map of planet Earth's northern sky is part of the Dunhuang Star Atlas, one of the most impressive documents in the history of astronomy. The oldest complete star atlas known, it dates to the years 649 to 684. In this example showing the north polar region, a very recognizable Big Dipper, part of the modern constellation Ursa Major, lies along the bottom of the chart.


Johannes Kepler 1610 - A key figure in the 17th century scientific revolution, he is best known for his eponymous laws of planetary motion, codified by later astronomers, based on his works Astronomia nova, Harmonices Mundi, and Epitome of Copernican Astronomy. These works also provided one of the foundations for Isaac Newton's theory of universal gravitation.


Walter S. McAfee (September 2, 1914 - February 18, 1995) was an African American scientist and astronomer, notable for participating in the world's first first lunar radar echo experiments with Project Diana. McAfee was born in Ore City, Texas in Upshur County, as one of nine children. His parents grew up on a farm and his dad was a CME minister.


The Women Who Mapped the Universe And Still Couldn’t Get Any Respect - Edward Pickering and his female assistants, known as the “Harvard computers.” Image from the Harvard-Smithsonian Center for Astrophysics.