NASA: Hubble Space Telescope

The Hubble Space Telescope

The Hubble Space Telescope is a collaboration between ESA and NASA. It's a long-term, space-based observatory. The observations are carried out in visible, infrared and ultraviolet light. In many ways Hubble has revolutionised modern astronomy,

by not only being an efficient tool for making new discoveries, but also by driving astronomical research in general.

History

When Galileo first turned a spyglass to the heavens in 1610, he had trouble making out the rings of Saturn that are visible in inexpensive telescopes today. Advances in optics improved scientists' views of the planets, stars, and distant galaxies, but Earth's atmosphere still blocked much of the light for observers on the ground. Larger telescopes were (and still are) placed on high mountains, where thinner atmospheres allow clearer pictures.

More About

The Hubble is a joint project between NASA and the European Space Agency.

Here are some basic facts about the telescope and the mission, courtesy the Space Telescope Science Institute (STScI).

Telescope size

Length: 43.5 feet (13.2 meters)

Weight: 24,500 lbs. (11,110 kilograms)

Maximum diameter: 14 feet (4.2 m)

Mission:
Launch: April 24, 1990, from space shuttle Discovery (STS-31)
Deployment: April 25, 1990
Servicing Mission 1: December 1993
Servicing Mission 2: February 1997
Servicing Mission 3A: December 1999
Servicing Mission 3B: February 2002
Servicing Mission 4: May 2009

Data

Hubble transmits about 120 gigabytes of science data every week. That would be roughly 3,600 feet (1,097 meters) of books on a shelf. The collection of pictures and data is stored on magneto-optical disks.

Power

Energy source: the sun
Mechanism: Two 25-foot solar panels
Power usage: 2,800 watts
Batteries: 6 nickel-hydrogen (NiH), with a storage capacity equal to 20 car batteries.

Hubble discoveries

Hubble's elevated perspective and advanced optics allow it to peer farther away than previous ground-based optics are able to see. Because light takes time to travel long distances, the range of the HST makes it function similar to a time machine; the light it views from remote objects only reveals how that object appeared when the light left it, not how it appears today.

Thus when we look at the Andromeda galaxy, 2.5 million light-years from Earth, we see it as it was 2.5 million years ago.

Here's the some images of captured by Hubbel telescope:

Comments

सिंधु घाटी की सभ्यता: हड़प्पा सभ्यता

आज हम अपने भारत के इतिहास के बारे में पढ़ेंगे हड़प्पा सभ्यता जैसा कि आप सभी को पता है भारत की सबसे पुरानी सभ्यता सिंधु घाटी सभ्यता है जिसे हड़प्पा सभ्यता भी कहा जाता है इसका काल 2500 ईसा पूर्व से 1500 पूर्व है सिंधु घाटी सभ्यता का भारतीय इतिहास में एक विशिष्ट स्थान क्योंकि सभ्यता के आने से भारतीय इतिहास में मौर्य काल से पूर्व की विशिष्ट जानकारी प्राप्त होती है सिंधु घाटी सभ्यता विश्व की प्राचीनतम सभ्यता हूं जैसे मिश्र मेसोपोटामिया सुमेर एवं कीट के समान विकसित एवं प्राचीन थी यह ताम्र पाषाण संस्कृति भी है सर्वप्रथम 1921 में राय बहादुर दयाराम साहनी ने हड़प्पा नामक स्थान पर इस महत्वपूर्ण सभ्यता के अवशेषों का पता लगाया प्रारंभ में उत्खनन कार्य सिंधु नदी घाटी में ही किया गया तथा वही इस सभ्यता के अवशेष सर्वप्रथम प्राप्त हुए थे अतः इस सभ्यता को सिंधु घाटी सभ्यता कहा गया परंतु इस सभ्यता के अवशेष सिंधु नदी की घाटी से दूर गंगा यमुना के दोआब और नर्मदा ताप्ती के मुहाने तक प्राप्त हुए हैं अतः पुरातत्व वेदो ने पुरातत्व परंपरा के आधार पर इस सभ्यता का नाम उसके सर्वप्रथम ज्ञात स्थल के नाम प...

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