Logo of Phnom Penh Post newspaper Phnom Penh Post - NASA's giant Webb telescope succeeds in key pre-launch test



NASA's giant Webb telescope succeeds in key pre-launch test

Content image - Phnom Penh Post
NASA's James Webb Space Telescope – the world's largest and most powerful space telescope is scheduled to launch into space in October. NASA/AFP

NASA's giant Webb telescope succeeds in key pre-launch test

The world's largest and most powerful space telescope unfolded its giant golden mirror for the last time on Earth on May 11, a key milestone before the $10 billion observatory is launched later this year.

The James Webb Space Telescope's 6.5m mirror was commanded to fully expand and lock itself into place, NASA said – a final test to ensure it will survive its 1.6-million-kilometre journey and is ready to discover the origins of the Universe.

Scott Willoughby of lead contractor Northrop Grumman said: "It's like building a Swiss watch at 40-feet-tall … and getting it ready for this journey that we take into the vacuum at minus 400 degrees Fahrenheit [minus 240 Celsius], four times further than the Moon."

He was speaking at the company's spaceport in Redondo Beach, in the US state of California, from where the telescope will be shipped to French Guiana to be launched on an Ariane 5 rocket, with NASA targeting October 31 for lift-off.

Webb's primary mirror is made of 18 hexagonal segments coated with an ultra-thin layer of gold to improve its reflection of infrared light.

It will fly to space folded like a piece of origami artwork, which allows it to fit inside a 5m rocket fairing, and will then use 132 individual actuators and motors to bend each mirror into a specific position.

Together, the mirrors will function as one massive reflector, to enable the telescope to peer deeper into the cosmos than ever before.

Scientists want to use the telescope to look back in time over 13.5 billion years ago and see for the first time the first stars and galaxies that formed, a few hundred million years after the Big Bang.

To do this, they need to detect infrared. The current premier space telescope, Hubble, only has limited infrared capacity.

This is key because by the time the light from the first objects reaches our telescopes, it has been shifted towards the red end of the electromagnetic spectrum as a result of the Universe extending the space between objects as it expands.

Another key area will be the discovery of alien worlds. The first planets to orbit other stars were detected in the 1990s and there are now more than 4,000 exoplanets that have been confirmed.

James Webb telescope programme scientist Eric Smith said Webb "has instrumentation that will propel this new and exciting field into its next epic of discovery".

Scientists from 44 countries will be able to make use of the telescope, with proposals including using the infrared capabilities to penetrate the supermassive black holes at the centre of galaxies, including our own.

Smith said: "The discovery capability of Webb is limited only by our own imaginations, and scientists around the world will soon be using this general purpose observatory to take us places we haven't dreamed of going before."

MOST VIEWED

  • Restrictions re-imposed in capital as Covid cases surge

    Amid the ongoing community outbreak of Covid-19, which has shown no sign of subsiding with 750 infections and 10 deaths reported on June 2 alone, the Phnom Penh Municipal Administration has decided to re-impose the suspension of all occupations and business activities deemed as posing high risk of

  • Phnom Penh-Sihanoukville expressway 51% complete

    The construction of the nearly $2 billion Phnom Penh-Sihanoukville Expressway is 51.35 per cent complete and is expected to be finished in 2023, according to Ministry of Public Works and Transport secretary of state Vasim Sorya. Invested in by Cambodian PPSHV Expressway Co Ltd, the first expressway in

  • First 7-Eleven store to open mid-June, ambassador says

    Thai retail conglomerate CP All Pcl will open Cambodia’s first 7-Eleven convenience store in mid-June, Cambodian ambassador to Thailand Ouk Sorphorn told The Post on June 1. The Bangkok-listed 7-Eleven franchise operator, the retail arm of Charoen Pokphand Group Co Ltd, granted CP All (Cambodia)

  • With herd immunity likely in 2022, is Cambodia ready to reopen for tourism?

    The government aims to inoculate 80 per cent of the target population by June next year, giving it a head start among regional peers to reboot the sector but first, it has to do a few things to up its game A sign on a glass

  • US embassy guard gets Covid despite two doses of Pfizer jab

    The Covid-19 tracking commission on June 4 said a security guard at the US embassy in Phnom Penh had contracted the novel coronavirus, despite having received a second dose of the Pfizer-BioNTech shot two weeks ago. Embassy spokesperson Chad Roedemeier confirmed the SARS-CoV-2 infection to The

  • US wants 'full access' to Ream Naval Base

    On June 11, the US embassy's Defense Attaché Colonel Marcus M Ferrara visited Ream Nava Base in coordination with Cambodian officials following the recent approval of Prime minister Hun Sen to allay the concerns on Chinese military presence at the base as raised by US Deputy