The Hubble Space Telescope established that the Cygnus Loop supernova may have exploded just 5000 years ago.
If you look at a globe of the Earth or at maps in an atlas, you will see the lines of latitude and longitude.
The Greek astronomer Hipparchos divided naked-eye stars into six brightness classes.
Three hundred years ago the Royal Observatory began to take astronomical measurements of the stars.
Many of the atoms from which our bodies are made were once, thousands of millions of years ago, deep in the interior of one of many stars.
The size of the telescope that we use determines how much detail we can see with it and how bright the image looks.
On 3 September 2000, the Telescope YEPUN successfully achieved 'First Light'.
The Gemini project enables astronomers to have coverage of the entire sky from the North Pole to the South.
Astronomers have obtained the sharpest-ever images taken with an Earth-based telescope.
In 2001 the Gemini North telescope obtained a striking image of gas being expelled from a young massive star.
The supernova remnant RCW103 was discovered in 2006. It originated in the colossal explosion of a star as a supernova about 2000 years ago.
In 1999 European astronomers used an optical detector to measure colour and intensity changes in a binary star for the first time.
In 1999 the Gemini telescope was pointed at the heart of our Milky Way galaxy.
In 2006 radio astronomers watched the aftermath of an explosion in a star system 5000 light years away.
In 2004 the Hubble Space Telescope revealed the most distant and oldest galaxies seen to that date.
Astronomers have found more than 500 galaxies that formed less than a billion years after the Big Bang.
In 2003 a flat star was seen with measurements made using the Very Large Telescope Interferometer (VLTI).
An adaptive optics system was used in 2001 to obtain images comparable to the quality of those of the Hubble Space Telescope.
In 2003 astronomers discovered the bright, hot, star-forming region known as the Lynx arc.
In 2002 the most distant group of galaxies was discovered about 13.5 billion light-years away from our Milky Way galaxy.
Astronomers announced in 2006 the discovery of a pair of planet-sized objects, drifting through space unattached to any star.
New images from NASA's Chandra orbiting X-ray observatory show strong evidence for a pulsar in the supernova remnant G292.0+1.8.