James Webb Telescope

Table of Contents

James Webb Telescope: Relevance

GS 3: Awareness in the fields of IT, Space, Computers, robotics, Nano-technology, bio-technology and issues relating to intellectual property rights.

NASA has recently launched the largest-ever space telescope by the Ariane 5 rocket from European Space Agency’s Spaceport in French Guiana, South America.

It is a joint project of the National Aeronautics and Space Administration (NASA), ESA (European Space Agency) and the Canadian Space Agency (CSA).
It is an infrared telescope, and being adjudged as the successor of the Hubble Space Telescope and the Spitzer Space Telescope.
It is also said to be the most powerful space telescope ever built.
JWST will be positioned much deeper into the space, at a spot known as L2.
- L2 is one of the five points, known as Lagrange’s points, in any revolving two-body system like Earth and Sun, where the gravitational forces of the two large bodies cancel each other out.
- Objects placed at these points are relatively stable and require minimal external energy to keep themselves there.
- L2 is a position directly behind Earth in the line joining the Sun and the Earth.
- It would be shielded from the Sun by the Earth as it goes around the Sun, in sync with the Earth.

It is expected to unveil many secrets of the universe, particularly those related to the formation of stars and galaxies in the early period after the Big Bang.
Time machine: These telescopes are also known as time machine of space due to their ability to see very faraway objects.
The images of stars and galaxies shown by the telescope are images of stars or galaxies as they were millions of years ago.
- It is because the light coming from those objects, stars or galaxies, which is captured by these telescopes, began its journey millions of years earlier.
The images sent by Hubble form the basis for much of our present-day understanding of the early universe and the formation and destruction of planets, stars and galaxies.
James Webb Telescope has the ability to look in the infrared spectrum, which will allow it to peer through much deeper into the universe, and see-through obstructions like gas clouds.

Infrared camera will take images of astronomical objects
Spectrometers will break the incoming infrared light into different colours for analysis.

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