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active galactic nucleus
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Introduction References & Edit History Quick Facts & Related Topics
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Cygnus A
black holes
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Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
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Planet Earth and lunar moon from space
Where Did the Moon Come From?
solar eclipse, sun, moon, astronomy, space
How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses?
Arrangement of the phases of the moon in total eclipse with Blood Moon
9 Celestial Omens
Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003
9 Britannica Articles That Explain the Meaning of Life
1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.
6 Questions About the Sun Answered
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Srinivasa Ramanujan, Indian mathematician and autodidact.
6 Interesting Facts about Srinivasa Ramanujan
Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland
The Largest Islands in the World
Panama Canal infographic
Timeline and Map of the Panama Canal
Coriander leaves, fresh green cilantro on wooden background, herbs
Why Does Cilantro Taste Like Soap to Some People?
Stylish light blue jeans on wooden background, closeup of inset pocket
Why Do Jeans Have That Tiny Pocket?
Monitor. Varanus salvadorii is a monitor lizard found in New Guinea can grows to 2.7 metres (9 ft.) aka Tree crocodile, Crocodile monitor, Salvadori's monitor, artellia, reptile
7 of the World’s Most Dangerous Lizards and Turtles
Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics
10 Best Hockey Players of All Time

active galactic nucleus: References & Edit History

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Article History

Type Description Contributor Date
Video added. May 31, 2023
Corrected display issue. Mar 20, 2023
Invalidated site: National Aeronautics and Space Administration - Introduction to Active Galactic Nuclei. Mar 11, 2019
Add new Web site: How Stuff Works - Science - Active Galaxies. Aug 02, 2011
Add new Web site: The University of Alabama - Astronomy Program - Active Galactic Nuclei. Aug 02, 2011
Add new Web site: National Aeronautics and Space Administration - Introduction to Active Galactic Nuclei. Aug 02, 2011
New article added. Feb 05, 2009
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