NASA launches world’s largest space telescope in search of alien life


The United States’ National Aeronautics and Space Administration (NASA) launched the world’s largest and most powerful space telescope on Saturday on a high-stakes quest to see light from the first stars and galaxies and to travel the universe in search of clues of life.

NASA’s James Webb Space Telescope took off from French Guiana on the northeast coast of South America, riding a European Ariane rocket in the Christmas morning sky.

The $ 10 billion observatory rushed to its destination 1.6 million kilometers, more than four times beyond the moon. It will take a month to get there and another five months before his infrared eyes are ready to start scanning the cosmos.

Read also :

First, the huge mirror and the telescope’s lens must extend; they were folded like an origami to fit into the nose cone of the rocket. Otherwise, the observatory will not be able to go back in time 13.7 billion years as expected, barely 100 million years after the formation of the Big Bang universe.

It’s going to give us a better understanding of our universe and our place in it: who we are, what we are, the search that is eternal, NASA Administrator Bill Nelson said earlier this week.

But he cautioned: when you want a big reward, you usually have to take a big risk.

In this image released by NASA, Arianespace’s Ariane 5 rocket with NASA’s James Webb space telescope on board takes off on Saturday from the European spaceport, the Guyana Space Center in Kourou, French Guiana. (Image: NASA via AP)
Designed to succeed the aging Hubble Space Telescope, the long-delayed James Webb is named after NASA’s administrator in the 1960s. NASA has partnered with European and Canadian space agencies to build and launch the new telescope of 7 tonnes, with thousands of people from 29 countries working there since the 1990s.

With the launch falling on Christmas and a worldwide increase in COVID-19 cases, there were fewer spectators at the French Guiana launch site than expected. Nelson bowed out with a delegation from Congress and many contractors who worked on the telescope.

Astronomers around the world have been eagerly awaiting to see Webb finally take off after years of setbacks. Last minute technical issues rocked the launch for almost a week, then gusts of wind pushed it over Christmas. Inside Launch Control, there was a handful of Santa hats.

“We are launching for humanity this morning,” Arianespace CEO Stéphane Israel said a few minutes before takeoff. “After Webb, we will never see the sky the same way again,” Israel added.

The centerpiece of the telescope: a gold-plated mirror over 21 feet in diameter.

The observatory shield is a five-layer vaporous sun visor, essential for keeping the light collecting mirror and heat-sensitive infrared detectors at sub-zero temperatures. At 70 feet by 46 feet, it’s the size of a tennis court.

If all goes well, the sun visor will be open three days after take-off, taking at least five days to unfold and lock into place. Then the mirror segments should open like the leaves of a drop-leaf table, about 12 days after the flight begins.

In total, hundreds of trigger mechanisms must work perfectly for the telescope to be successful. Like nothing we’ve done before, said NASA program director Greg Robinson.

Retired astronaut-astronomer Steven Hawley is more stressed for Webb than for Hubble, which he put into orbit from the space shuttle Discovery in 1990. That’s because Webb will be too far away to be rescued, as it was. needed when Hubble was found to be blurry. vision of a defective mirror.

Space repairs done by astronauts have turned Hubble into a beloved wonder that revolutionized humanity’s understanding of the universe, casting its eyes 13.4 billion years ago. It’s now up to Webb to get even closer to the Big Bang 13.8 billion years ago, its infrared vision thinner and wider than Hubble’s in the shortest visible and ultraviolet wavelengths.

NASA is pulling for 10 years of operational life from Webb. Engineers deliberately left the fuel tank accessible for refilling when visiting a spacecraft, if and when such technology became available.

When he released Hubble, “I never thought he would still be strong almost 32 years later,” Hawley, now professor emeritus at the University of Kansas, said in an email. “I hope in 32 years I can say JWST has done it too.”

(Edited by : Vijay Anand)


Comments are closed.