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Half a million galaxies for CFHT's 30th anniversary
DR EMILY BALDWIN
ASTRONOMY NOW
Posted: December 10, 2009


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To mark the occasion of 30 years since the Canada-France-Hawaii Telescope saw 'first light', a 370-megapixel deep sky image containing half a million galaxies has been released.

The image containing some half a million galaxies (left) and zooming in on just a small portion (right, and below).

The image – CFHT Legacy Survey Deep Field #1 – was made by accumulating hundreds of hours worth of light integration over five years using the 340-megapixel camera MegaCam. Stacking the images together reveals an ultra-deep view of some half a million distant galaxies, along with a few foreground stars from our own Galaxy. Ultra-deep views like this can be used to probe the most distant galaxies, quasars and gravitational lensing effects.

Close-up view of just 0.07 percent of the deep field.

The new image is far too large to display on a computer screen, so CFHT has created a zoomable image. The image published here shows the whole view which is nearly 20,000 square pixels. Zooming in reveals the glorious detail captured in the survey; the inset is an image 500x500 pixels and makes up 0.07 percent of the whole image. You can navigate the whole region here.

The CFHT is a 3.6 metre optical/infrared telescope and is located at the summit of Mauna Kea in Hawaii. It has been operational since 1979.

The Planets
From tiny Mercury to distant Neptune and Pluto, The Planets profiles each of the Solar System's members in depth, featuring the latest imagery from space missions. The tallest mountains, the deepest canyons, the strongest winds, raging atmospheric storms, terrain studded with craters and vast worlds of ice are just some of the sights you'll see on this 100-page tour of the planets.
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Hubble Reborn
Hubble Reborn takes the reader on a journey through the Universe with spectacular full-colour pictures of galaxies, nebulae, planets and stars as seen through Hubble's eyes, along the way telling the dramatic story of the space telescope, including interviews with key scientists and astronauts.
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3D Universe
Witness the most awesome sights of the Universe as they were meant to be seen in this 100-page extravaganza of planets, galaxies and star-scapes, all in 3D!
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