NEW YORK: The Hubble Space telescope, hailed by astronomers as one of the most productive scientific instruments ever constructed, is this year celebrating its 25th year in space.
The telescope has provided more than 1 million observations to date, many of which have fundamentally altered our understanding of the universe.
Most notably, it is thanks to the Hubble that astronomers are able to estimate that the universe is between 12 and 13 billion years old.
It is also responsible for the discovery of the Hubble Deep Field, a tiny speck of sky that revealed a zoo of about 3,000 galaxies — some as old as 10 billion years — as well as supermassive black holes.
The telescope whirls around Earth at 28,000 kilometres an hour, taking 96 minutes to complete one orbit.
It was named after Dr Edwin Hubble, the astronomer who in 1929 discovered that the universe was expanding. It was this notion that formed the basis of the Big Bang theory.
Below are some of the most extraordinary images that the Hubble has captured over the years.
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