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What it is : The irregular dwarf galaxy I Zwicky 18
Where it is:59 million light - years away , in the constellation Ursa Major
I Zwicky 18 is a dwarf irregular galaxy in Ursa Major.
When it was published : March 26 , 2024
Why it ’s so special : The galaxy I Zwicky 18 may have an odd name , but it ’s the galaxy ’s odd appearance that has catch the attention of astronomers using theJames Webb Space Telescope(JWST ) .
This new image from JWST ( also available as azoomable version ) reveals that this irregular dwarf galaxy has undergone several sudden bursts of sensation formation , theEuropean Space Agency(ESA ) say in adescription of the image . Its low content of heavy elements ( those heavy than hydrogen and helium ) make it distinctive of the galaxies that existed in the other universe . It ’s also much smaller than theMilky Way .
I Zwicky 18 is a dwarf irregular galaxy in Ursa Major.
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If you front at the galaxy ’s core , you may see two decided bright areas studded with stars . It ’s conceive that the youngest stars are in the northwesterly region . Both places are palisade by brown filaments — accelerator bubble heated by stellar winds and acute ultraviolet actinotherapy breathe by young star topology burning exceptionally hot , ESA say .
One ground for these two lobes of immature lead may be the presence of another nearby coltsfoot . you may see it below I Zwicky 18 in this epitome as a aggregation of blue stars . The little extragalactic nebula orbits its declamatory companion , and its gravitational influence may touch off star formation within it , scientist suspect .
I Zwicky 18 gets its name from its inventor , Fritz Zwicky , the Swiss stargazer who discovered the galaxy in the 1930s .
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Almost as telling as the photograph is what exists behind I Zwicky 18 and its neighbor in this ikon . In the top - right-hand street corner is a star in front of the galaxy . But around it are hundreds of other oval - shaped Galax urceolata in the ground , some white and others tinted orange because they ’re so far forth . ( ruddy Christ Within has a longer wavelength . )
The figure of speech come from a syllabus design to contemplate the living cycle of dust in I Zwicky 18 , building on observations in seeable spark by theHubble Space Telescope . While Hubble found fainter , former crimson adept that suggest that stars were forming 1 billion to 10 billion years ago , JWST ’s infrared observations reveal much more recent ace formation .
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