Nasa unveils Hubble's Successor "JWST"

Posted May 15, 2007 by Chris V. Thangham

NASA unveils Hubble telescope's successor "The James Webb Space Telescope".
James Webb Space Telescope (JWST)
James Webb Space Telescope (JWST)
The US space agency NASA has unveiled a model of a space telescope that scientists say will be able to see to the farthest reaches of the Universe.
Hubble Telescope is in Space since 1990 and it has been repaired many times and has far exceeded its original mission. So far it has given astounding images of Space which mankind has never seen before. Now NASA wants to replace it with an advanced telescope, “The James Webb Space Telescope (JWST)”. JWST is named after James E Webb, NASA Administrator during the Apollo lunar exploration era, which he served from 1961 to 1968.
JWST will be bigger than Hubble telescope and will b further away fro the Earth and also have a larger mirror to enable it see further deep in space. Here is a comparison picture:
JWST will be launched in June 2013. Its full scale mode design is displayed outside the Smithsonian National Air and Space Museum in Washington, D.C.
The new telescope will cost $4.5 billion dollars (£2.3bn) and will be positioned about 1.5 million kilometers (930,000 miles) from Earth.
It will measure 24m (80ft) long by 12m (40ft) high and incorporate a hexagonal mirror 6.5m (21.3ft) in diameter, almost three times the size of Hubble's.
Edward Weiler, director of NASA’s Goddard Space Flight Center, said the purpose of JWST is to go back further in time to see the birth of the Universe (the original point of big bang theory).
Martin Mohan of North Grumman, the contractor building the telescope, said they have made rapid progress, and they will be ready for launch ahead of time.
When JWST is ready, it will be launched by a European Ariane 5 rocket. JWST is expected to send back pictures to Earth for 10 years. Till then old reliable Hubble will be doing the work and sending more pictures and details about Space. Hubble will also be serviced in 2008 by the NASA astronauts.
Here are some details about “The James Webb Space Telescope”
• It will be placed 1.5m km from Earth, at Lagrange Point 2, an area of gravitational balance that keeps it in a Sun-Earth line
• The telescope will be shaded from sunlight by a shield, enabling it to stay cold, increasing its sensitivity to infrared radiation
• Three principal instruments will gather images of the Universe in the infrared region of the spectrum
• These will yield new information about how stars and galaxies first formed a few hundred million years after the Big Bang
It has been long due to replace Hubble, so this will be great news for astronomers, students and scientists.