The Gemini Telescopes


The Gemini project is a multi-national partnership of seven countries that has resulted in two identical 8.1 metre telescopes - one on Hawaii's Mauna Kea mountain (Gemini North) and the other on central Chile's Cerro Pachon mountain (Gemini South). As well as the United Kingdom, the others partners in the project are the United States, Canada, Chile, Australia, Brazil and Argentina. Gemini North began taking observations in February 1999 after 10 years of planning.

Gemini Telescope

Gemini Telescope

    Some facts about the telescope:

  • Observatory location: Mauna Kea, Hawaii

  • Height above sea level: 4,139 metres (13,580 feet)

  • Moving mass: 342 metric tonnes

  • Mirror diameter: 8.1 metres

  • Mirror thickness: 20 centimetres

  • Weight of glass: 22 metric tonnes

 

This long exposure clearly demonstrates the rotation of the Earth around the South Celestial Pole. Over time the stars will appear to trace out circles around the imaginary rotation axis of our planet. Only stars on that axis point will appear to stand still - such as the North or Pole Star in the northern hemisphere.

Whilst we would find it hard to notice any rotation or circling of stars in the night sky, over the 45 minutes it took to take this picture, the rotation is very obvious.

Image © Gemini Observatory

Star trails at Gemini Telescope

Star trails at Gemini Telescope


 

Images taken by the Gemini Telescope.

NGC 6946 - The Fireworks Galaxy

NGC 6946 - The Fireworks Galaxy

The image quality on this large telescope is so good that it can capture the finer detail within distant galaxies - such as this image of the NGC 6946 spiral galaxy, otherwise known as the Fireworks Galaxy beacuse of all the hot, red star forming regions that can be seen in the galaxy's spiral arms.

Image © Gemini Observatory/Travis Rector, University of Alaska Anchorage

 

The image here shows great clouds of gas and dust which are being used as material in the construction of new stars. Eventually the gas and dust will all be used up, to reveal a cluster of new-born stars. In the meantime however, we are able to see some amazing cloud shapes and colours.

Image © Gemini Observatory/University of Florida/Nidia Morrell/UNLP-CONICET

NGC 6357 - A star forming region

NGC 6357 - A star forming region

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