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# The Hubble Space Telescope: the big picture
## For 20 years the Hubble Space Telescope has shown us amazing images like
these. Giles Sparrow, author of Hubble: Window on the Universe, explains why
it's a modern marvel.
![Light echoes from a red supergiant star, as captured by the Hubble Space
Telescope. ][1]
Light echoes from a red supergiant star, as captured by the Hubble Space
Telescope.
Giles Sparrow 5:37PM GMT 16 Dec 2010
In the two decades since its launch in 1990, Nasa's Hubble Space Telescope has
gone from white elephant to scientific powerhouse.
Although its 2.4m (8ft) light-gathering mirror is dwarfed by modern Earth-
based telescopes, Hubble still gets the sharpest views of the cosmos thanks to
its unique vantage point above the atmosphere.
Shortcuts during construction saw it launched with an embarrassing flaw - a
distorted mirror that initially left the telescope short-sighted. But in 1993
astronauts fitted Hubble with "contact lenses", in the first of five daring
servicing missions that have kept it on the cutting edge ever since.
Hubble has become the world's best-known telescope thanks to its stunning
images of celestial phenomena, ranging from cauldrons of starbirth and planets
around other suns to dying stars and distant galaxies.
But it has also carried a range of instruments for other types of research,
such as measuring the chemistry of distant objects and tracking their movement
through space.
## Related Articles
* [WIN! a new book about the Hubble Space Telescope's amazing
discoveries][2]
17 Dec 2010
* [Images from the Hubble Space Telescope][3]
16 Dec 2010
Perhaps its greatest achievement, however, has been measuring the distance to
galaxies many millions of light years away. These precise measurements have
allowed astronomers to calculate the rate of cosmic expansion, and hence the
size and age of the Universe.
Improvements to ground-based instruments mean that Hubble will probably be
both the first and last telescope of its kind, but it will leave a spectacular
legacy.
### Win a copy of the new Hubble book
Hubble: Window on the Universe by Giles Sparrow (Quercus, £20), which
showcases the telescope's astonishing contribution to science through a series
of 200 spectacular images, is available now.
[**Enter here for your chance to win a copy of Hubble: Window on the
Universe**][4]
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## [Future of science][10]
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[The Hubble Telescope »][15]
### [WIN! a new book about the Hubble Space Telescope's amazing
discoveries][2]
[![Light echoes from a red supergiant star, as captured by the Hubble Space
Telescope. ][16] ][2]
The Telegraph has five copies of Hubble: Window on the Universe by Giles
Sparrow, worth £40 each, to give away.
### [The Hubble Space Telescope: the big picture][17]
For 20 years the Hubble Space Telescope has shown us amazing images like
these. Giles Sparrow, author of Hubble: Window on the Universe, explains why
it's a modern marvel.
### [Images from the Hubble Space Telescope][3]
[![Images taken by the Hubble Space Telescope from Giles Sparrow's Hubble:
Window on the Universe. ][18]][3]
Images taken by the Hubble Space Telescope from the book Hubble: Window on the
Universe.
[The new silicon? »][19]
### [Graphene: our miracle material][20]
[![Graphene is a planar sheet of carbon atoms arranged in a hexagonal pattern.
Stacked graphene sheets form graphite, used in pencils. ][21] ][20]
Graphene is harder than diamond, just a single molecule thick and conducts
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discovered it about why it could revolutionise everything.
[1]: http://i.telegraph.co.uk/multimedia/archive/01786/hubble1_1786847b.jpg
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[3]: /sponsored/motoring/ford-future-sessions/future-of-science/8207252
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[18]:
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[21]:
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