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NASA's Webb telescope to wow astronomers, find first galaxies

by Reuters

WASHINGTON Dec 15, 2021 - 8:58 am GMT+3
NASA’s James Webb Space Telescope is secured on top of the Ariane 5 rocket that will launch it to space from Europe’s Spaceport in Kourou, French Guiana, Dec. 11, 2021. (AP Photo)
NASA’s James Webb Space Telescope is secured on top of the Ariane 5 rocket that will launch it to space from Europe’s Spaceport in Kourou, French Guiana, Dec. 11, 2021. (AP Photo)
by Reuters Dec 15, 2021 8:58 am

NASA's James Webb Space Telescope, finished years late at a cost significantly higher than planned, is finally slated for launch next week and the telescope may finally begin its mission of ushering in a new astronomical era of space exploration as it looks into the earliest stages of the universe and looks beyond the solar system for planets that can sustain life.

The orbiting infrared observatory, designed to be about 100 times more sensitive than its Hubble Space Telescope predecessor, is due to blast off on Dec. 22 on an Ariane 5 rocket from a site in French Guiana on South America’s northeastern coast – though the launch has been delayed for at least two days.

“We're about to go on this amazing journey of discovery,” said astronomer Klaus Pontoppidan, a Webb project scientist the Space Telescope Science Institute in Baltimore. “We really mean discovery because Webb has the raw power to reveal the unexpected. We can plan what we think we're gong to see. But at the end of the day we know that nature will surprise us more often than not.”

The telescope, boasting four scientific instruments, is an international collaboration led by NASA in partnership with the European and Canadian space agencies. Northrop Grumman Corp is the primary contractor. The launch vehicle is part of the European contribution.

Engineers unpack, clean and prepare the James Webb Space Telescope ahead of its scheduled launch into orbit, upon its arrival at the launch site in Kourou, French Guiana, Nov. 2, 2021. (Reuters Photo)
Engineers unpack, clean and prepare the James Webb Space Telescope ahead of its scheduled launch into orbit, upon its arrival at the launch site in Kourou, French Guiana, Nov. 2, 2021. (Reuters Photo)

It was developed at a cost of $8.8 billion, with operational expenses projected to bring its total price tag to about $9.66 billion. The United States Government Accountability Office said the price has nearly doubled since NASA established a cost baseline in 2009 after earlier cost overruns. NASA had hoped to launch it in 2011, but the date was repeatedly delayed.

Scientists plan to use the telescope to learn about all phases of the universe's history dating back to just after the Big Bang event about 13.8 billion years ago, while also studying exoplanets – planets beyond our solar system – as well as worlds closer to home such as our planetary neighbor Mars and Saturn's moon Titan.

Webb mainly will look at the universe in the infrared, while Hubble has examined it since its 1990 launch primarily at optical and ultraviolet wavelengths. Webb has a much bigger light-collecting area, letting it look at greater distances, thus farther back into time, than Hubble.

“We're looking forward to this and we're getting very, very close,” said Greg Robinson, Webb's program director at the U.S. space agency's Washington headquarters.

The telescope arrived in French Guiana in October after a 16-day sea journey from California through the Panama Canal to Port de Pariacabo on the Kourou River. After launch, it will deploy on a month-long million-mile (1.6-million-kilometer) journey to a more distant orbit than Hubble, beyond the moon.

The Sunshield test unit to be used on NASA's James Webb Space Telescope is stacked and expanded at a cleanroom in the Northrop Grumman facility in Redondo Beach, California, U.S., July 25, 2014. (Reuters Photo)
The Sunshield test unit to be used on NASA's James Webb Space Telescope is stacked and expanded at a cleanroom in the Northrop Grumman facility in Redondo Beach, California, U.S., July 25, 2014. (Reuters Photo)

“We're going to look at everything there is in the universe that we can see. We want to know: how did we get here from the Big Bang, how did that work So, we'll look,” said John Mather, Webb senior project scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Its mission goals include searching for the first galaxies or luminous objects formed after the Big Bang and learning how galaxies evolved from their initial birth to the present day.

“We want to look at those first galaxies growing,” Mather said.

The goals also include observing the formation of stars and the planets around them. Mather said Webb can peer into the clouds of gas and dust where stars are being born. Until now, the dust in those clouds obscured the view.

“Infrared light will go around the dust grains instead of bouncing off, so we can see that with the Webb telescope. And that's one of our top goals – to see how stars grow, with their young planets,” Mather said.

An instrument called a spectrometer can study the atmospheres of exoplanets. Mather said finding one with lots of water – thought to be one of the key ingredients for life – would be “really interesting.” As he put it: “a wet little planet out there that might be a little bit like home.”

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