tag:blogger.com,1999:blog-2877698188774561460.post832520241603278259..comments2023-11-06T17:59:14.655+02:00Comments on Eco R Geo: Hubble telescope celebrates 25th birthday antixronoshttp://www.blogger.com/profile/17321757470762094126noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-2877698188774561460.post-45595793514016384852015-04-24T07:43:41.663+03:002015-04-24T07:43:41.663+03:00Hubble Space Telescope celebrated 25 years on...
...Hubble Space Telescope celebrated 25 years on...<br /><br />From helping to determine the age of the universe to proving the existence of black holes, the $2.5bn Hubble Space Telescope has been a hugely powerful tool of scientific discovery.<br /><br />Friday marks 25 years since the telescope was first launched.<br /> <br />It was not the first space telescope, but when it was launched into low Earth orbit in 1990, it carried onboard an unprecedented array of instruments: a 2.4-metre mirror and four main sensors designed to capture ultraviolet, visible, and near infrared light.<br /><br />Putting the telescope above the distortion of Earth's atmosphere gave it the ability to take very high-resolution images without the interference of background light.<br /><br />"I like to describe the atmosphere being something like looking through an old stained glass window," said Dr Nancy Grace Roman, the first chief astronomer at NASA. "The glass has defects in it and that sort of keeps you from getting a sharp picture, and the atmosphere also has defects."...........aljazeera.com<br />24/4/15Anonymousnoreply@blogger.com