HEIC: Hubble Takes Gigantic Image of the Triangulum Galaxy

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bystander
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HEIC: Hubble Takes Gigantic Image of the Triangulum Galaxy

Post by bystander » Mon Jan 07, 2019 5:36 pm

Hubble Takes Gigantic Image of the Triangulum Galaxy
ESA Hubble Photo Release | 2019 Jan 07
The NASA/ESA Hubble Space Telescope has captured the most detailed image yet of a close neighbour of the Milky Way — the Triangulum Galaxy, a spiral galaxy located at a distance of only three million light-years. This panoramic survey of the third-largest galaxy in our Local Group of galaxies provides a mesmerising view of the 40 billion stars that make up one of the most distant objects visible to the naked eye.

This new image of the Triangulum Galaxy — also known as Messier 33 or NGC 598 — has a staggering 665 million pixels and showcases the central region of the galaxy and its inner spiral arms. To stitch together this gigantic mosaic, Hubble’s Advanced Camera for Surveys (ACS) needed to create 54 separate images.

Under excellent dark-sky conditions, the Triangulum Galaxy can be seen with the naked eye as a faint, blurry object in the constellation of Triangulum (the Triangle), where its ethereal glow is an exciting target for amateur astronomers. ...

Triangulum Galaxy Shows Stunning Face in Detailed Hubble Portrait
NASA | STScI | HubbleSite | 2019 Jan 07
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Ann
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Re: HEIC: Hubble Takes Gigantic Image of the Triangulum Galaxy

Post by Ann » Tue Jan 08, 2019 1:58 am

Great portrait to be sure, but I am unhappy with the colors. M33 looks quite orange in the new Hubble picture. But the B-V index of M33 is 0.55, making the overall light of this galaxy bluer than the Sun.
















Compare the picture of M33 (left) with an ESA/Hubble picture of M81 (right). The B-V index of M81 is 0.95, making the galaxy yellower than the Sun. But in the pictures, M33, which is bluer than the Sun, looks more orange than M81.

Ann
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