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NASA’s Web Space Telescope is ready to deploy the sunblock and cool off

Credit: NASA’s Goddard Space Flight Center’s Ideological Image Lab

With Webb’s first major structural deployments complete and Webb’s deployable turret assembly extended, we’re taking a step back to learn more about Webb’s solar shield. From Michael MacLean, Scientist at Trace Project

NASA
Established in 1958, the National Aeronautics and Space Administration (NASA) is an independent agency of the United States Federal Government that succeeded the National Advisory Committee for Aeronautics (NACA). It is responsible for the civilian space program, as well as aeronautics and aerospace research. It’s vision is “To discover and expand knowledge for the benefit of humanity.”

“> NASAThe Goddard Space Flight Center offered these ideas:

“Web telescopes and science instruments are ready to go into the shade, and never see sunlight again. It uses one of Webb .’s unique design features Inactive Cooling by a five-layer solar shield to reach the telescope’s operating temperature at 45 K (-380 degrees)

Fahrenheit
The Fahrenheit scale is a temperature scale, named after the German physicist Daniel Gabriel Fahrenheit and based on one he proposed in 1724. In the Fahrenheit temperature scale, the freezing point of water freezes is 32 °F and water boils at 212 °F, a 180 °F separation, as defined at sea level and standard atmospheric pressure. 

“>Fahrenheit) Huge 70 x 47 ft (21 x 14 m) sun shield when in use or approximately the size of a tennis court. Determined by the geometry and size of the sunvisor, the telescope can point to a field covering 40% of the sky at any given time and can observe anywhere in the sky for more than six months. This innovative architecture allows for the reduction of heat sensitivity to wavelengths below 15 microns, rather than being compromised by laboratory thermal glow, against a natural sky background (mostly zodiacal light).

“On launch, the sunvisor folds like a canopy and is mounted on the front and rear integrated ballast (UPS) structures.

Web telescope unfolds sequence

After launch and its first month in space, on the way to its second long-range point (L2), the Web undergoes a complex expansion sequence. Credit: NASA, ESA, CSA, Joyce Kang (STScI)

“There are 50 Sort keys The heat will turn her soup and launch formation into a functional monitoring station. The Sunshield sawing line was pushed forward and then from the telescope to the machine output and UPS position. The telescope and scientific instruments were mounted on a sortable turret assembly and then mechanically released and raised. Attached to the terminal of the UPS is a temporary flap, which is released and positioned so that its function is to balance the solar pressure on the rated sun block. Sunscreen caps are released by pulling the film release devices and setting up the system for diffusion of the sunblock layers. The telescopic intermediate booms are pushed out of the spacecraft carrier perpendicular to the telescopic view, pulling the folded layer of sunvisor layers out of the final configuration, but still taut. Finally, each layer of sunscreen is tightly tightened, starting with the first layer facing the sun and ending with the layer facing the telescope. The classified solar shield initiates the rapid cooling of telescopes and scientific instruments, but heaters on board the scientific instruments are used to control their cooling and prevent contamination.

“While these steps have been field tested and rehearsed for work in the Mission Operations Centre, these are critical steps that must be performed for a successful mission. Congratulations to our team, and keep calm on the web! “

— Michael McClain, Web Monitoring Project Scientist, NASA’s Goddard Space Center

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