Stars

Supernova 1987A
Supernovae are vast explosions in which an entire star is destroyed.
The Crab Nebula
Pulsars were discovered in 1967 by Jocelyn Bell and Anthony Hewish at the radio astronomy observatory at Cambridge.
The basic difference between a star and a planet is that a star emits light, but a planet shines by reflected light.
Planetary Nebula M2-9
This is the story of the birth and death of stars, of the origin of the elements and of the fight of matter against gravity.
During the Astronomical Congress of 1928, it was decided to recognize 88 constellations.
Cocoon of a New White Dwarf (H. Bond (STScI), R. Ciardullo (PSU), WFPC2, HST, NASA)
The first white dwarf star to be found was the companion to the bright star Sirius. Sirius and its companion are in mutual orbit about each...
Spinning and non-spinning black holes (NASA/CXC/M. Weiss)
A black hole is an object which has such a strong gravitational field that its escape velocity is greater than the speed of light.
Christmas star
Many people have attempted to give an astronomical explanation for the star of Bethlehem.
All official names have to be adopted by the IAU, and are allocated to different types of object.
Facts and figures about the 25 brightest stars, including apparent and absolute visual magnitude, distance and spectral type.
Facts and figures about the 30 closest stars to Earth, including apparent and absolute visual magnitude, distance and spectral type.
Extracts from African star myths, kindly donated by the South African Astronomical Observatory.
In 2006 radio astronomers watched the aftermath of an explosion in a star system 5000 light years away.
The star cluster Praesepe in the spring sky may be two separate clusters.
Distant galaxy clusters
In 2002 the most distant group of galaxies was discovered about 13.5 billion light-years away from our Milky Way galaxy.
In 1999 European astronomers used an optical detector to measure colour and intensity changes in a binary star for the first time.
In 2003 a flat star was seen with measurements made using the Very Large Telescope Interferometer (VLTI).
In 2001 the Gemini North telescope obtained a striking image of gas being expelled from a young massive star.
In 2003 astronomers discovered the bright, hot, star-forming region known as the Lynx arc.