Hubble Examines a Star-Forming Chameleon. What is it exactly? See here

30/01/2022
Credit: NASA, ESA, K. Luhman and T. Esplin (Pennsylvania State University), et al., and ESO; Processing: Gladys Kober (NASA/Catholic University of America)
Credit: NASA, ESA, K. Luhman and T. Esplin (Pennsylvania State University), et al., and ESO; Processing: Gladys Kober (NASA/Catholic University of America)

Hubble Examines a Star-Forming Chamaeleon. The image above by the Hubble Telescope captures one of three segments that comprise a 65-year-old star-forming region, according to NASA. The region surprised by the telescope is from the Chamaeleon Cloud Complex and is called Chamaeleon Cloud I. The region has dust that forms stars, dark clouds, and many other radiant nodes called Herbig-Haro objects. 

About the image: 

Herbig-Haro objects, which were identified by NASA at the location discovered by Hubble, are bright clumps and arcs of interstellar gas shocked and energized by jets expelled from infant "protostars" which are currently in the process of formation. At the bottom, you can see a cloud of white and orange. It houses in its center, one of the "protostars". "Its bright white jets of hot gas are thrown into narrow torrents from the poles of the protostar, creating the Herbig-Haro HH 909A object," said NASA. 

As you can see around the stars it forms like a luminous cross. This is not from the picture the telescope took, but it is something "natural" that happens in most pictures where stars are captured. These bright spots around the stars appear when light waves from them bend around the cross-shaped crossbeams of the Hubble Telescope that support the secondary mirror. "As the light waves pass these struts, they coalesce on the other side, creating the bright, spikey starburst effect we see." said NASA. 

Hubble studied Cha I according to a project on which he had to look for extremely thin, small-mass brown dwarfs. These brown dwarfs are faint stars, the size of a large planet to a dwarf star. Their mass is usually between 10 and 90 times the mass of Jupiter. Even though these stars have a mass up to 90 times the mass of a planet, it doesn't mean much to a star. This mass does not even allow them to ignite and support nuclear fusion in their core. 

Even if it's hard to believe, the image above is 315 million pixels, according to NASA. The composite image is made up of 23 observations made by Hubble's Survey Chamber, one of the best on board the telescope. However, even after these 23 observations, gaps remained. The gaps between the observations were filled by another 20 observations from the Wide Field Planetary Camera. And even after these 20 observations, there were still small gaps between the information, which were all filled with ground data from VISTA VIRCAM from ESO.

Article by: Andacs Robert Eugen, on 30 January 2022, at 09:17 am Los Angeles time

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