James Webb Space Telescope

Next Generation Space Telescope!

How were black holes formed? Is there another form of life out there? Where? How did everything begin? These and many more ambitious questions have thrived in the scientific world for decades. Come and meet Webb – the telescope that will unveil the past and change the future.

Mission Objective

The James Webb Space Telescope’s (JWST) purpose is to address profound inquiries about the cosmos and usher in groundbreaking revelations across all domains of astronomy. Webb is poised to explore deeper into our cosmic origins, from the genesis of stars and planets to the emergence of the earliest galaxies in the early universe.

Mission Significance

This remarkable project enables a wide range of investigations in the fields of astronomy and cosmology, including the study of the earliest stars and the birth of the first galaxies. Moreover, it allows for the in-depth analysis of the atmospheres of exoplanets that could potentially support life.

Source: NASA

Engineering Challenges

JWST pushes each component and subsystem to its extreme limits. Because it has never been attempted before, it is one of the most complicated engineering challenges ever attempted in the space observation sector.

• Cryogenic Temperature Maintenance – In order for the telescope to observe infrared in space, its own IR emission needs to be suppressed. Therefore, the 6.5 mirror telescope and its instruments must be kept at ~40K, which is extremely difficult in the extreme thermal conditions in space.
• Deployment complexity – The telescope with all its components – the multi-layer sunshield, mirror system, and its instruments – must unfold successfully after launch with zero tolerance to mechanical failure. This is the most complex assembly ever deployed in orbit.
• Stability at L2 – JWST operates 1.5 million km away, thus, all of the systems must coordinate perfectly with each other since it’s far beyond any physical-repairing distance.
• High Detector Sensitivity – For achieving stable radiometric performance in ultra-dark conditions, it is required to have extremely high SNR, perfect stray light control, and precise optical alignment.

Instruments & Components

The Integrated Science Instrument Module (ISIM) serves as an inclusive framework for electrical power supply, computing resources, cooling capacity, and structural stability to JWST. The telescope is primarily intended for IR astronomy.

• JWST surpasses Hubble in its ability to observe extremely ancient, distant, or faint objects since it’s equipped with high-resolution and high-sensitivity instruments.

Source: Webbtelescopeorg

Acktar’s Solution

Acktar contributed ultra-low-reflectance black coatings to support JWST’s extreme infrared sensitivity. The components that were coated are the filter wheel and calibration assembly, with the Magic Black and Fractal Black coatings. These coatings exhibit near-blackbody absorption and high resistance to cryogenic contraction, which suits JWTS’s cryogenic operating temperatures.

Impact

Throughout its mission, Webb achieved numerous breakthroughs in the field of cosmology and captured a multitude of images from deep space. Here are some of its most significant discoveries:

• K2-18b – an exoplanet with a mass 8.6 times greater than that of Earth, has provided evidence of the existence of carbon-containing compounds, such as methane and
• Identification of CO2 on the iced surface of Europa – Jupiter’s moon.
• Dust particles rich in carbon content during the initial billion years of cosmic history.

Cosmic Web by Webb. Source: Webbtelescope.org

Webb has gone on a quest to answer the biggest mysteries of our universe. While the world is watching with anticipation, it has already begun its first discoveries.

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