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Corey S Powell
Corey S Powell
@coreyspowell@mastodon.social  ·  activity timestamp 4 days ago

The visible universe contains about a trillion galaxies, in a dizzying variety of styles.

The blue scatter at bottom is Leo P, a nearby dwarf galaxy that is just one-millionth the mass of our Milky Way. It's almost pure hydrogen & helium--much like the galaxies of long ago.

https://www.stsci.edu/contents/news-releases/2025/news-2025-401 #space #science #nature

STScI

This Tiny Galaxy Is Answering Some Big Questions

This image from NASA’s James Webb Space Telescope shows a portion of the Leo P dwarf galaxy (stars at lower right represented in blue). Leo P is a star-forming galaxy located about 5 million light-years away in the constellation Leo. A team of scientists collected data from about 15,000 stars in Leo P to deduce its star formation history. They determined that it went through three phases: an initial burst of star formation, a “pause” that lasted several billion years, and then a new round of star formation that is still continuing.
This image from NASA’s James Webb Space Telescope shows a portion of the Leo P dwarf galaxy (stars at lower right represented in blue). Leo P is a star-forming galaxy located about 5 million light-years away in the constellation Leo. A team of scientists collected data from about 15,000 stars in Leo P to deduce its star formation history. They determined that it went through three phases: an initial burst of star formation, a “pause” that lasted several billion years, and then a new round of star formation that is still continuing.
This image from NASA’s James Webb Space Telescope shows a portion of the Leo P dwarf galaxy (stars at lower right represented in blue). Leo P is a star-forming galaxy located about 5 million light-years away in the constellation Leo. A team of scientists collected data from about 15,000 stars in Leo P to deduce its star formation history. They determined that it went through three phases: an initial burst of star formation, a “pause” that lasted several billion years, and then a new round of star formation that is still continuing.
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