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Zooming in on Pismis 24, Webb gets glittering glimpse of star birth

Glittering glimpse of star birth
In what appears as a celestial dreamscape, a blue and black sky is filled with stars of different sizes. Across the bottom of the scene is a craggy, mountain-like vista with spire-like peaks and deep, seemingly misty valleys. Above the soaring spires is a wispy, ethereal white cloud and steam appears to rise from the mountaintops and join with this cloud. Credit: NASA, ESA, CSA; STSci image processing by Alyssa Pagan (STScI)

This dramatic scene captured by NASA's James Webb Space Telescope looks like a fantastical tableau from J. R. R. Tolkien's The Lord of the Rings. But truth is even stranger than fiction. In reality, what appears to be a craggy, starlit mountaintop kissed by wispy clouds is actually a cosmic dust-scape being sculpted by the scorching radiation and punishing winds of massive newborn stars.

Called Pismis 24, this young star cluster resides in the core of the nearby Lobster Nebula, approximately 5,500 light-years from Earth in the constellation Scorpius. Home to a vibrant stellar nursery and one of the closest sites of massive star birth, Pismis 24 provides rare insight into large and massive stars. Its proximity makes this region one of the best places to explore the properties of hot young stars and how they evolve.

This zoom-in video shows the location of the young star cluster Pismis 24 on the sky. Credit: NASA, ESA, CSA, STScI, Alyssa Pagan (STScI)

At the heart of this glittering cluster is the brilliant Pismis 24-1. It is at the center of a clump of stars above the jagged orange peaks, and the tallest spire is pointing directly toward it. Pismis 24-1 appears as a gigantic single star, and it was once thought to be the most massive known star. Scientists have since learned that it is composed of at least two stars, though they cannot be resolved in this image. At 74 and 66 , respectively, the two known stars are still among the most massive and luminous stars ever seen.

Glittering glimpse of star birth from NASA's Webb Telescope
Webb captured this NIRCam image of star birth in Pismis 24, a young star cluster about 5,500 light-years from Earth in the constellation Scorpius. This region is one of the best places to explore the properties of hot young stars and how they evolve. Credit: NASA, ESA, CSA; STSci image processing by Alyssa Pagan (STScI)

Captured in by Webb's NIRCam (Near-Infrared Camera), this image reveals thousands of jewel-like stars of varying sizes and colors. The largest and most brilliant ones with the six-point diffraction spikes are the most massive stars in the cluster. Hundreds to thousands of smaller members of the cluster appear as white, yellow, and red, depending on their stellar type and the amount of dust enshrouding them. Webb also shows us tens of thousands of stars behind the cluster that are part of the Milky Way galaxy.

Super-hot, infant stars—some almost eight times the temperature of the sun—blast out scorching radiation and punishing winds that are sculpting a cavity into the wall of the star-forming nebula. That nebula extends far beyond NIRCam's field of view. Only small portions of it are visible at the bottom and top right of the image. Streamers of hot, ionized gas flow off the ridges of the nebula, and wispy veils of gas and dust, illuminated by starlight, float around its towering peaks.

This scientific visualization takes viewers on a journey to a glittering young star cluster called Pismis 24. NASA's James Webb Space Telescope captured this fantastical scene in the heart of the Lobster Nebula, approximately 5,500 light-years from Earth. Credit: NASA, ESA, CSA, STScI, Leah Hustak (STScI), Christian Nieves (STScI)

Dramatic spires jut from the glowing wall of gas, resisting the relentless radiation and winds. They are like fingers pointing toward the hot, young stars that have sculpted them. The fierce forces shaping and compressing these spires cause new stars to form within them. The tallest spire spans about 5.4 light-years from its tip to the bottom of the image. More than 200 of our solar systems out to Neptune's orbit could fit into the width of its tip, which is 0.14 lightyears.

In this image, the color cyan indicates hot or ionized hydrogen gas being heated up by the massive . Dust molecules similar to smoke here on Earth are represented in orange. Red signifies cooler, denser molecular hydrogen. The darker the red, the denser the gas. Black denotes the densest gas, which is not emitting light. The wispy white features are dust and gas that are scattering starlight.

Provided by NASA

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