It was an emotional day for scientists as they shared with the world the first science-quality images from NASA's next-generation observatory.
The James Webb Space Telescope, known as Webb or JWST, launched in December, then spent seven months preparing for operations. All that work is paying off, astronomers said during an event held at NASA's Goddard Space Flight Center in Maryland on July 12 as they discussed the stunning new data, which include crystal-clear images of distant nebulas and galaxies, as well as a detailed look at a hot exoplanet's atmosphere.
"A lot of people sometimes see pictures of space and it makes them feel small," Eric Smith, chief scientist at NASA's astrophysics division and program scientist for JWST, said during the news conference. "When I see these pictures, they make me feel powerful, that a team of people can make this unbelievable instrument to find out things about the universe."
He gestured to the new image of the Carina Nebula, a massive cloud of dust and gas located some 7,600 light-years away from Earth, displayed on a screen behind the speakers. "When we want to, we can do that."
The image combines views from two instruments, the Near-Infrared Camera (NIRCam), which maps stars and galaxies, and the Mid-Infrared Instrument (MIRI), which paints the massive cloud of dust and gas where countless new stars are forming in dramatic orange billows.
"We're scientists and these images are used to do science, but when I saw that one in particular, I felt I was going into a gallery," René Doyon, an exoplanet scientist at the University of Montreal in Canada who serves as principal investigator on a different instrument, said during the news conference. "This is an art piece."
The new images also included an ultradeep infrared view, a portrait of a second nebula called the Southern Ring and a dynamic swirl of galactic activity representing Stephan's Quintet.
But although the news conference was held to mark these new views of the cosmos, astronomers reflected on the emotional impact of all JWST's images to date — even engineering images.
"The first focused images that we took, where they were razor-sharp, that for me was the one where I had the very emotional reaction," Jane Rigby, operations project scientist for JWST at Goddard, said during the news conference. In particular, she remembers seeing the observatory's first view of the standard star that scientists used to measure how much light was streaming through the telescope.
"Personally, I went and had an ugly cry," she said. "It was a combination of giddy in the room — looking at the data, 'Oh my God, this is great' — and then, like, going and having a little sob. Because it works."
Doyon agreed that these are hardly the only JWST images to stir feelings as large as the observatory's mirror.
"We should expect what we saw, but no," he said. "Several times in the last six months, I nearly broke my jaw."