Webb Captures Stellar Gymnastics in The Cartwheel Galaxy


A large pink, speckled galaxy resembling a wheel with with a small, inner oval, with dusty blue in between on the right, with two smaller spiral galaxies about the same size to the left against a black background.

NASA’s James Webb Space Telescope has peered into the chaos of the Cartwheel Galaxy, revealing new details about star formation and the galaxy’s central black hole. Webb’s powerful infrared gaze produced this detailed image of the Cartwheel and two smaller companion galaxies against a backdrop of many other galaxies. This image provides a new view of how the Cartwheel Galaxy has changed over billions of years.
The Cartwheel Galaxy, located about 500 million light-years away in the Sculptor constellation, is a rare sight. Its appearance, much like that of the wheel of a wagon, is the result of an intense event – a high-speed collision between a large spiral galaxy and a smaller galaxy not visible in this image. Collisions of galactic proportions cause a cascade of different, smaller events between the galaxies involved; the Cartwheel is no exception.
The collision most notably affected the galaxy’s shape and structure. The Cartwheel Galaxy sports two rings — a bright inner ring and a surrounding, colorful ring. These two rings expand outwards from the center of the collision, like ripples in a pond after a stone is tossed into it. Because of these distinctive features, astronomers call this a “ring galaxy,” a structure less common than spiral galaxies like our Milky Way.
The bright core contains a tremendous amount of hot dust with the brightest areas being the home to gigantic young star clusters. On the other hand, the outer ring, which has expanded for about 440 million years, is dominated by star formation and supernovas. As this ring expands, it plows into surrounding gas and triggers star formation.
Other telescopes, including the Hubble Space Telescope, have previously examined the Cartwheel. But the dramatic galaxy has been shrouded in mystery – perhaps literally, given the amount of dust that obscures the view. Webb, with its ability to detect infrared light, now uncovers new insights into the nature of the Cartwheel.

Source: https://www.nasa.gov/feature/goddard/2022/webb-captures-stellar-gymnastics-in-the-cartwheel-galaxy

James Webb Space Telescope glimpses Earendel, the most distant star known in the universe

The star’s discovery by the Hubble Space Telescope was only announced earlier this year.

Earendel, the most distant known star in the universe, was discovered by the Hubble Space Telescope earlier this year, but now the James Webb Space Telescope has glimpsed it too. (Image credit: NASA/ESA/Space Telescope Science Institute)

The James Webb Space Telescope has caught a glimpse of the most distant star known in the universe, which had been announced by scientists using Webb’s predecessor the Hubble Space Telescope only a few months ago.
The star, named Earendel, after a character in J.R.R. Tolkien’s “Lord of the Rings” prequel “The Silmarillion,” was discovered thanks to gravitational lensing in a Hubble Space Telescope deep field image. The star, whose light took 12.9 billion light-years to reach Earth, is so faint that it might be rather challenging to find it in the new James Webb Space Telescope image, which was released on Twitter on Tuesday (Aug. 2) by a group of astronomers using the account Cosmic Spring JWST(opens in new tab).
The original Hubble image provides some guidance as to where to look through the zoomed-in cut-out. Essentially, Earendel, is the tiny whitish dot below a cluster of distant galaxies. By comparing the Hubble image with that captured by Webb, you can find the elusive Earendel.

Source: https://www.space.com/james-webb-space-telescope-earendel-most-distant-star

By: Miss Cherry May Timbol – Independent Reporter

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