NASA’s largest and most powerful space science telescope, the James Webb telescope is set to be sent into space on 22nd December 2021

  • The James Webb space telescope will be launched by NASA into space on 22nd December 2021
  • The telescope will succeed the former Hubble Space Telescope but will not orbit the Earth, like its predecessor but rather the Sun
  • The telescope will find the first galaxies ever formed and will also visualize stars forming planets, providing crucial details to astronomers.

The logistics and specifications

Scientists and astronomers have described The Webb telescope essentially as a giant heat telescope. It detects mainly infrared radiation. Hence, to visualize stars or galaxies in infrared light, the telescope needs to be exceptionally cold, or else it can’t detect anything other than its radiation. This is where the heat shield equipment comes into action. The shield is made of thin plastic-coated aluminum. It is five layers thick and will fulfill the task of maintaining the telescope at minus 390 degrees Fahrenheit (minus 234 Celsius).

The Webb telescope has a mirror measuring almost 20 feet to capture the essence of space with absolute accuracy. It is also equipped with a sunshade to block out solar radiation. This shade measures around the size of a whole tennis court. The telescope has state-of-the-art cameras and sensor systems to collect and process the data obtained. It works almost as similar to a satellite dish.

Light from various galaxies is bound to enter the mouth of the telescope and reflect off the primary mirror toward the four sensors. These sensors are responsible for different aspects:

A. The NIRCam takes photographs in the near-infrared region

B. The Near-Infrared Spectrograph can split the light from several sources like galaxies into their constituent wavelengths and measures the strength of each color

C. The Mid-Infrared Instrument takes images and measures wavelengths in the middle infrared region

D. The Near Infrared Imaging Slitless Spectrograph splits and measures the light of any object the scientists direct the satellite at.

The team behind the innovation of the James Webb Space Telescope

The James Webb space telescope, often abbreviated as JWST is a joint venture between NASA, the European Space Agency(ESA), and the Canadian Space Agency(CSA). It was manufactured by the Northrop Grumman Corporation and Ball Aerospace & Technologies. It is currently considered to be one of the greatest astrophysics missions to be ever witnessed by the human race.

The mission in place for the Webb Telescope

Astronomers are hoping with the launch of the JWST, they will be able to study the very first galaxies of the universe to be formed. Hence, the Webb Telescope has been given the name “The first light machine” in this regard. Also, scientists are hoping to study other newer, distant galaxies close to the edge of the observable universe. Since space is always expanding, these newer galaxies might also house planets worth exploring. With the Webb telescope, scientists will be able to determine the atmospheric composition of these planets to deem them fit for human habitation as well. Researchers also aim to study the pattern of birth of various stars in different galaxies, particularly the Milky Way, our home. They also wish to study certain “protogalaxies” formed recently about 300 million years post the Big Bang. The Webb telescope will also help in the visualization of stars giving birth to new planetary systems.

The course of action after reaching its orbit

Once it reaches orbit after launch, it will take another 35 days before the parts get cooled optimally to start the very crucial next step known as alignment. The telescope will unfold and align itself over another 6 months. Since the telescope is making its journey to one of the farthest points of the known universe, it can’t be serviced by astronauts. Instead, the Webb telescope will be controlled remotely by radio signals monitored by an efficient team at the Space Telescope Science Institute in Baltimore.

In the alignment process, the first to unfold will be the mirrors. The NIRCam equipped on board will take high-resolution images of these mirrors to ensure accuracy. To ensure this flawless process of alignment a set of two NIRCams are present on board in case one fails. The telescope team on the ground will analyze the images and adjust motors accordingly to make any necessary changes. Once the motors move the mirrors into position, the Webb telescope will begin collecting data.

Testing and the final launch date

Over the past 12 years, the team behind the Webb telescope has tested its constituents and instruments, in a simulated environment to mimic the actual rocket launch. They also rehearsed the extremely cooled operating conditions of the telescope.

The launch date for the telescope has been set to 22nd December 2021. The launch will take place at the Guiana Space Center at the ELA-3 launch pad in French Guiana. An Ariane 5 rocket will be used to take the telescope to its destination orbit around the Sun, 1.5 million kilometers away. Astronomers identify this specific point as the second Lagrange point or L2.

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