Days before the launch of the James-Webb Space Telescope, Futura invites you to return to five highlights or anecdotes that punctuated the design of the new ESA and NASA device.
launch ofDecember 14th is fast approaching, despite another postponement announced by ESA and NASA. The new flagship of space observation, must fly From Kourou Base in Guyana. James Webb Space Telescope (JWST), indicated as the successor of , is also a real To the record: Huge budget, design extended over several decades, many delays to its credit… Take a look at five key facts that forged the reputation of one of the most ambitious projects of the past 30 years.
1. A project developed over 25 years
is twenty fiveBetween the first draft of the James-Webb telescope and its launch in late 2021. JWST’s adventure began in 1996 under another name: next generation space telescope (New Generation Space Telescope). NASA decided to launch A low-cost, $500 million space telescope. next generation space telescope Already envisioned as the spiritual successor to Hubble, , Very quickly, delays will add up, making launch dates slippery from 2000 to 2010, then finally to 2021. NASA postponements and the scale of the project will rapidly explode the initial budget.
2. A $10 Billion Telescope
With James-Webb, NASA wants to build an innovative space telescope, efficient but at a low cost. Thus the administration limits the initial budget at $500 million. In 1998, two years after the first draft of next generation space telescope,To increase the budget allocated for the project. The design of JWST thus reached $1 billion. In parallel with technological advances and the many delays experienced by Western space agencies, this figure will continue to rise. Ultimately, JWST’s development will cost a staggering $10 billion, or 20 times its initial planned amount.
3. 1.5 million kilometres. go to
After take-off on December 24 (subject to launch without delay), the James-Webb telescope will travel 29 days in the direction of its objective:, The latter is located 1.5 million kilometers away from Earth , will provide JWST with an optimal position to carry out its observation mission. Lagrange point L2 is indeed an ideal region of space for deep sky observation, allowing permanent communication with terrestrial control stations as well as power supplies. Thanks for the sunlight.
4. James-Webb Space Telescope is also the largest
Not surprisingly, the dimensions of the JWST are up to, Thus the weight of the device is 6,500 . Is , with a primary mirror with a diameter of 6.5 m and a sun visor of 22 x 12 m the size of a tennis court. For comparison, the diameter of Hubble’s primary mirror is “only” 2.4 meters in diameter. James-Webb has scientific utility, and will make it possible to store more distant stars will provide more More accurate celestial bodies were observed.
5. JWST will see 100 million years after the Big Bang
James Webb Space Telescope have a chance to see, While some visible bodies like planets To be pictured, the new space telescope has priority targets oldest of , which appeared only after 100 million years , 14 billion years ago. Must be allowed to look into the ‘past’ so far And To learn more about the creation of the universe, first and the Galactic System. To date, Hubble and . a combined overview of allowed us to go back to the Milky Way that arose 400 million years after the Big Bang.
The James-Webb Telescope will launch on December 24, 2021 at 1:20 p.m. PST.
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