US President Biden unveils telescope’s first full-color image of distant galaxies
Our view of the universe just expanded: The first image from NASA’s new space telescope unveiled Monday is brimming with galaxies and offers the deepest look of the cosmos ever captured.
The first image from the $10 billion James Webb Space Telescope is the farthest humanity has ever seen in both time and distance, closer to the dawn of time and the edge of the universe. That image will be followed Tuesday by the release of four more galactic beauty shots from the telescope’s initial outward gazes.
U.S. President Joe Biden, pausing from political pressures to bask in the glow of the cosmos, on Monday released the debut photo from NASA’s James Webb Space Telescope – an image of a galaxy cluster revealing the most detailed glimpse of the early universe ever seen.
The White House sneak peek of Webb’s first high-resolution, full-color image came on the eve of a larger unveiling of photos and spectrographic data that NASA plans to showcase on Tuesday at the Goddard Space Flight Center in suburban Maryland.
The largest and most powerful space science telescope ever launched, was designed to peer through the cosmos to the dawn of the known universe, ushering in a revolutionary era of astronomical discovery.
The image showcased by Biden and NASA chief Bill Nelson showed the 4.6 billion-year-old galaxy cluster named SMACS 0723, whose combined mass acts as a “gravitational lens,” distorting space to greatly magnify the light coming from more distant galaxies behind it.
At least one of the faint, older specs of light appearing in the “background” of the photo – a composite of images of different wavelengths of light – dates back more than 13 billion years, Nelson said. That makes it just 800 million years younger than the Big Bang, the theoretical flashpoint that set the expansion of the known universe in motion some 13.8 billion years ago.
“It’s a new window into the history of our universe,” Biden said before the picture was unveiled. “And today we’re going to get a glimpse of the first light to shine through that window: light from other worlds, orbiting stars far beyond our own. It’s astounding to me.”
He was joined at the Old Executive Office Building of the White House complex by Vice President Kamala Harris, who chairs the U.S. National Space Council.
FROM GRAIN OF SAND IN THE SKY
On Friday, the space agency posted a list of five celestial subjects chosen for its showcase debut of Webb. These include SMACS 0723, a bejeweled-like sliver of the distant cosmos that according to NASA offers “the most detailed view of the early universe to date.” It also constitutes the deepest and sharpest infrared image of the distant cosmos ever taken.
The thousands of galaxies were captured in a tiny patch of the sky roughly the size of a grain of sand held at arm’s length by someone standing on Earth. The busy image with hundreds of specks, streaks, spirals and swirls of white, yellow, orange and red is only “one little speck of the universe,” Bill Nelson said.
“What we saw today is the early universe,” Harvard astronomer Dimitar Sasselov said in a phone interview after the reveal.
Sasselov said he and his colleague Charles Alcock first thought “we’ve seen this before.” Then they looked closer at the image and pronounced the result not only beautiful but “worth all that waiting” for the much-delayed project.
And even more is coming Tuesday. The pictures on tap include a view of a giant gaseous planet outside our solar system, two images of a nebula where stars are born and die in spectacular beauty and an update of a classic image of five tightly clustered galaxies that dance around each other.
Webb was constructed under contract by aerospace giant Northrop Grumman Corp. It was launched to space for NASA and its European and Canadian counterparts on Christmas Day 2021 from French Guiana, on the northeastern coast of South America.
The highly anticipated release of its first imagery follows six months of remotely unfurling Webb’s various components, aligning its mirrors and calibrating instruments.
With Webb now finely tuned and fully focused, scientists will embark on a competitively selected list of missions exploring the evolution of galaxies, the life cycles of stars, the atmospheres of distant exoplanets and the moons of our outer solar system.
Built to view its subjects chiefly in the infrared spectrum, Webb is about 100 times more sensitive than its 30-year-old predecessor, the Hubble Space Telescope, which operates mainly at optical and ultraviolet wavelengths.
The much larger light-collecting surface of Webb’s primary mirror – an array of 18 hexagonal segments of gold-coated beryllium metal – enables it to observe objects at greater distances, thus further back in time, than Hubble or any other telescope.
All five of Webb’s introductory targets were previously known to scientists. Among them are two enormous clouds of gas and dust blasted into space by stellar explosions to form incubators for new stars – the Carina Nebula and the Southern Ring Nebula, each thousands of light years away from Earth.
The collection also includes a galaxy clusters known as Stephan’s Quintet, which was first discovered in 1877 and encompasses several galaxies described by NASA as “locked in a cosmic dance of repeated close encounters.”
NASA will also present Webb’s first spectrographic analysis of an exoplanet – one roughly half the mass of Jupiter that lies more than 1,100 light years away – revealing the molecular signatures of filtered light passing through its atmosphere. (Agencies)
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