January 17, 2022

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5 things to know about the largest and most sophisticated web space telescope ever built

A few days before the launch of the James-Webb Space Telescope, Futura invites you to return to the five highlights or events that stopped the design of the new ESA and NASA device.

Start Telescope Spatial James-Web Despite another postponement announced by ESA and NASA on December 14th, it is fast approaching. The new flag of space observation, must depart December 24 From the Kourou site in Guyana. The James Webb Space Telescope (JWST), indicated as heirHubble, Even real Warehouse For records: Massive budget, decades of extended design, many delays in its arrival … Look back at five key facts that have built the reputation of one of the most ambitious projects of the last 30 years.

1. A project developed in 25 years

Twenty-five years Duration The first drafts of the James-Web 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 has decided to launch Construction Low cost, $ 500 million space telescope. The Next generation space telescope Already envisioned as Hubble’s spiritual heir, Launched in 1990. Very quickly, delays will increase, with release dates slipping from 2000 to 2010 and then finally until 2021. NASA’s postponements and the size of the project will quickly blow up the initial budget.

2. $ 10 billion telescope

Through James-Web, NASA wants to build an innovative space telescope that is efficient but low cost. Management limits the initial budget to $ 500 million. In 1998, two years after the first drafts Next generation space telescope, First delays Stimulates an increase in the budget allocated to the project. JWST’s design reached $ 1 billion. This number will continue to increase, in line with technological advances and the many delays experienced by Western space agencies. Ultimately, JWST’s development will cost $ 10 billion or 20 times its initial planned outlay.

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3. Go 1.5 million kilometers

Following the departure on December 24 (further launched), the James-Web Telescope will travel 29 days to its intended purpose: Point D Lagrange L2. The latter is located in the opposite direction, 1.5 million kilometers from Earth சோலைல், Will provide optimal conditions for JWST to carry out its monitoring mission. Lockrange Point L2 is the best place to observe deep skies, allowing permanent contact and grounding with ground control stations. Energy Thanks for the sunlight.

4. The James-Webb Space Telescope is also huge

Not surprisingly, the dimensions of the JWST are up The size of the project. The weight of this device is 6,500 Kilograms, 6.5 meters in diameter with head mirror and Sun visor 22 by 12 meters, the size of a tennis court. In comparison, the diameter of the Hubble main glass is “only” 2.4 meters in diameter. The Great James-Webb has a scientific application that makes it possible to collect more and more Brightness Distant stars and hosting Resolution The most accurate celestial objects were observed.

5. JWST will see up to 100 million years after the Big Bang

The James Webb Space Telescope Get the chance to notice Wide range of celestial objects. When some visible bodies like planets The Solar System Can take pictures, the priority targets of the new space telescope Constellations The oldestThe universeAppeared only 100 million years later Big Bang14 billion years ago. Let’s look at the ‘past’ so far Astronomers And Astronomers To learn more about the creation of the universe, first Stars And galaxy systems. To date, Hubble’s joint observation and Spitzer Allowed to return to a galaxy born 400 million years after the Big Bang.

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The James-Web telescope will be launched on December 24, 2021 at 1:20 pm on PST.

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