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File:NGC 1637 Imaged By The Hubble Space Telescope.jpg

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Source	ESA/Hubble
Credit/Provider	ESA/Hubble & NASA, D. Thilker
Usage terms	Creative Commons Attribution 4.0 International License
Short title	Signs of the stellar lifecycle
Image title	The subject of this NASA/ESA Hubble Space Telescope Picture of the Week is NGC 1637, a spiral galaxy located 38 million light-years from Earth in the constellation Eridanus. This image comes from an observing programme dedicated to studying star formation in nearby galaxies. Stars form in cold, dusty gas clouds that collapse under their own gravity. As young stars grow, they heat their nurseries through starlight, winds, and powerful outflows. Together, these factors play a role in controlling the rate at which future generations of stars form. Evidence of star formation is scattered all around NGC 1637, if you know where to look. The galaxy’s spiral arms are dotted with what appear to be pink clouds, many of which are accompanied by bright blue stars. The pinkish colour comes from hydrogen atoms that have been excited by ultravioletlight from young, massive stars. This contrasts with the warm yellow glow of the galaxy’s centre, which is home to a densely packed collection of older, redder stars. The stars that set their birthplaces aglow are comparatively short-lived, and many of these stars will explode as supernovae justa few million years after they’re born. In 1999, NGC 1637 played host to a supernova, pithily named SN 1999EM, that was lauded as the brightest supernova seen that year. When a massive star expires as a supernova, the explosion outshines its entire home galaxy for a short time. While a supernovamarks the end of a star’s life, it can also jump start the formation of new stars by compressing nearby clouds of gas, beginning the stellar lifecycle anew. [Image Description: A spiral galaxy filling the view. Its disc is filled with bright red spots where stars are forming, dark reddish threadsof dust that obscure light, and bluish glowing areas where older stars are concentrated. It has a large, glowing yellow oval area at the centre, from which two spiral arms wind through the galaxy’s disc. The bottom side of the disc is rounded while the top side is somewhat squared-off.]
Date and time of data generation	06:00, 2 December 2024
Contact information	https://esahubble.org ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States
Keywords	NGC 1637
IIM version	4

File:NGC 1637 Imaged By The Hubble Space Telescope.jpg

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