NASA’s James Webb telescope captures stunning image of an ‘lonely’ galaxy 3 million light-years from the Milky Way
- NASA’s James Webb Space Telescope snapped the most detailed image of a lonely galaxy to date
- The dwarf galaxy, Wolf–Lundmark–Melotte (WLM), is about three million light-years from Earth and does not interact with surrounding systems
- The telescopes NIRCam is capable of detecting light from the earliest stars and galaxies, and was able to capture details of the ancient stars
- The galaxy was previously observed by NASA’s Spitzer Telescope in 2016, but its instruments are not as powerful and it snapped the stars as blurs in the darkness of space
NASA’s James Webb Space Telescope (JWST) has shared a stunning image of a lonely galaxy three million light-years from Earth in never before seen detail that shows thousands of ancient glittering stars within the region.
The dwarf galaxy, Wolf–Lundmark–Melotte (WLM) was only viewed by the Spitzer Space Telescope in 2016, but its instruments are no match for JWST’s and the image shows the stars as blurs.
Using JWST’s powerful mechanics, NASA hopes to reconstruct the star formation history of this galaxy that it believes formed billions of years ago – not too long after the Big Bang.
The image also demonstrates JWST’s remarkable ability to resolve faint stars just outside of the Milky Way – something that was never possible until now.
NASA shared on Twitter that, compared with past space observatory images, Webb’s NIRCam image ‘makes the whole place shimmer,’ which CNN reports is a reference to the song ‘Bejeweled’ on Taylor Swift’s new album, ‘Midnights.’
The James Web Telescope image captured a never before seen details of the Wolf–Lundmark–Melotte galaxy that sits just outside the Milky Way. It is deemed lonely because it does not interact with any other systems
The NIRCM (Near-Infrared Camera) is capable of detecting light from the earliest stars and galaxies.
This observation was taken as part of Webb’s Early Release Science (ERS) program 1334, focused on resolved stellar populations.
The dwarf galaxy WLM was selected for this program as its gas is similar to that which made up galaxies in the early universe and it is relatively nearby, meaning that Webb can differentiate between its individual stars.
WLM is in our galactic neighborhood but is 10 times smaller than our galaxy.
It was discovered by Max Wolf in 1909, but the nature of it was later accredited to Knut Lundmark and Philibert Jacques Melotte in 1926.
Although WLM is relatively close to our Milky Way, it is somewhat isolated and does not interact with other systems, according to Kristen McQuinn of Rutgers University, one of the lead scientists on ERS.
The dwarf galaxy, Wolf–Lundmark–Melotte (WLM) was only viewed by the Spitzer Space Telescope in 2016, but its instruments are no match for JWST’s and the image shows the stars as blurs
However, because WLM is not intertwined and entangled with the Milky Way, it is a prime subject to study.
‘Another interesting and important thing about WLM is that its gas is similar to the gas that made up galaxies in the early universe. It’s fairly unenriched, chemically speaking,’ McQuinn shared in a statement to NASA.
‘This is because the galaxy has lost many of these elements through something we call galactic winds.
‘Although WLM has been forming stars recently – throughout cosmic time, really – and those stars have been synthesizing new elements, some of the material gets expelled from the galaxy when the massive stars explode.
‘Supernovae can be powerful and energetic enough to push material out of small, low-mass galaxies like WLM.’
This is why WLM is a sought after study subject, as astronomers can observe how stars form and evolve in small galaxies just as those did when the universe first formed.
‘We can see a myriad of individual stars of different colors, sizes, temperatures, ages, and stages of evolution; interesting clouds of nebular gas within the galaxy; foreground stars with Webb’s diffraction spikes; and background galaxies with neat features like tidal tails. It’s really a gorgeous image,’ McQuinn said.
‘And, of course, the view is far deeper and better than our eyes could possibly see.
‘Even if you were looking out from a planet in the middle of this galaxy, and even if you could see infrared light, you would need bionic eyes to be able to see what Webb sees.’
The galaxy contains low-mass stars, which are believed to live for billions of years, and that means they formed shortly after the Big Bang.
The goal is to determined the properties of these low-mass stars, specifically their ages, to gain insight into what was happening in the very distant past.
‘Now we’re looking at the near-infrared light with Webb, and we’re using WLM as a sort of standard for comparison (like you would use in a lab) to help us make sure we understand the Webb observations,’ said McQuinn.
‘We want to make sure we’re measuring the stars’ brightnesses really, really accurately and precisely. We also want to make sure that we understand our stellar evolution models in the near-infrared.’
The James Webb Telescope: NASA’s $10 billion telescope is designed to detect light from the earliest stars and galaxies
The James Webb telescope has been described as a ‘time machine’ that could help unravel the secrets of our universe.
The telescope will be used to look back to the first galaxies born in the early universe more than 13.5 billion years ago, and observe the sources of stars, exoplanets, and even the moons and planets of our solar system.
The vast telescope, which has already cost more than $7 billion (£5 billion), is considered a successor to the orbiting Hubble Space Telescope
The James Webb Telescope and most of its instruments have an operating temperature of roughly 40 Kelvin – about minus 387 Fahrenheit (minus 233 Celsius).
It is the world’s biggest and most powerful orbital space telescope, capable of peering back 100-200 million years after the Big Bang.
The orbiting infrared observatory is designed to be about 100 times more powerful than its predecessor, the Hubble Space Telescope.
NASA likes to think of James Webb as a successor to Hubble rather than a replacement, as the two will work in tandem for a while.
The Hubble telescope was launched on April 24, 1990, via the space shuttle Discovery from Kennedy Space Centre in Florida.
It circles the Earth at a speed of about 17,000mph (27,300kph) in low Earth orbit at about 340 miles in altitude.
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