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Explore Hubble

2 min read

Hubble Seeks Clusters in ‘Lost Galaxy’

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This NASA/ESA Hubble Space Telescope image features the spiral galaxy NGC 4535.
ESA/Hubble & NASA, F. Belfiore, J. Lee and the PHANGS-HST Team

Today’s NASA/ESA

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image features the spiral galaxy NGC 4535, which is situated about 50 million light-years away in the constellation Virgo (the Maiden). Through a small telescope, this galaxy appears extremely faint, giving it the nickname ‘Lost Galaxy’. With a mirror spanning nearly eight feet (2.4 meters) across and its location above Earth’s light-obscuring atmosphere, Hubble can easily observe dim galaxies like NGC 4535 and pick out features like its massive spiral arms and central bar of stars.

This image features NGC 4535’s young star clusters, which dot the galaxy’s spiral arms. Glowing-pink clouds surround many of these bright-blue star groupings. These clouds, called H II (‘H-two’) regions, are a sign that the galaxy is home to especially young, hot, and massive stars that blaze with high-energy radiation. Such massive stars shake up their surroundings by heating their birth clouds with powerful stellar winds, eventually exploding as supernovae.

The image incorporates data from an observing program designed to catalog roughly 50,000 H II regions in nearby star-forming galaxies like NGC 4535. Hubble released a previous image of

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. Both the 2021 image and this new image incorporate observations from the
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, which seeks to understand the connections between young stars and cold gas. Today’s image adds a new dimension to our understanding of NGC 4535 by capturing the brilliant red glow of the nebulae that encircle massive stars in their first few million years of life.

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Media Contact:

Claire Andreoli (*****@*****.tld)
NASA’s 

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Greenbelt, MD

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Last Updated
Nov 20, 2025
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Andrea Gianopoulos
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