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    dwarf galaxy tagged posts

    This Tiny Galaxy is Answering Some Big Questions

    January 18, 2025, Categories  Astronomy/Space

    Stars against a black space background
    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.
    Kristen McQuinn/NASA’s James Webb Space Telescope

    Leo P, a small galaxy and a distant neighbor of the Milky Way, is lighting the way for astronomers to better understand star formation and how a galaxy grows.

    In a study published in the Astrophysical Journal, a team of researchers led by Kristen McQuinn, a scientist at the Space Telescope Science Institute and an associate professor in the Department of Physics and Astronomy at the Rutgers Unive...

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    Astronomers find Evidence for most Powerful Pulsar in Distant Galaxy

    June 16, 2022, Categories  Astronomy/Space

    Version Without Labels — Top Left: A giant blue star, much more massive than our Sun, has consumed, through nuclear fusion at its center, all its hydrogen, helium, and heavier elements up to iron. It now has a small iron core (red dot) at its center. Unlike the earlier stages of fusion, the fusion of iron atoms absorbs, rather than releases, energy. The fusion-released energy that has held up the star against its own weight now is gone, and the star will quickly collapse, triggering a supernova explosion. Top Right: The collapse has begun, producing a superdense neutron star with a strong magnetic field at its center (inset). The neutron star, though containing about 1.5 times the mass of the Sun, is only about the size of Manhattan...
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    Evidence of Broadside Collision with Dwarf Galaxy discovered in Milky Way

    October 21, 2020, Categories  Astronomy/Space

    The Milky Way’s Shell Structure Reveals the Time of a Radial Collision
    Thomas Donlon II, Heidi Jo Newberg, Robyn Sanderson, Lawrence M. Widrow

    ‘Shell structures’ are first of their kind found in the galaxy. Nearly 3 billion years ago, a dwarf galaxy plunged into the center of the Milky Way and was ripped apart by the gravitational forces of the collision. Astrophysicists announced today that the merger produced a series of telltale shell-like formations of stars in the vicinity of the Virgo constellation, the first such “shell structures” to be found in the Milky Way. The finding offers further evidence of the ancient event, and new possible explanations for other phenomena in the galaxy.

    Astronomers identified an unusually high density of stars called the Virgo Overdensity about ...

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    Hubble fortuitously discovers a New Galaxy in the Cosmic MNeighborhood

    February 1, 2019, Categories  Astronomy/Space

    Astronomers using the NASA/ESA Hubble Space Telescope to study some of the oldest and faintest stars in the globular cluster NGC 6752 have made an unexpected finding. They discovered a dwarf galaxy in our cosmic backyard, only 30 million light-years away.

    An international team of astronomers recently used the NASA/ESA Hubble Space Telescope to study white dwarf stars within the globular cluster NGC 6752. The aim of their observations was to use these stars to measure the age of the globular cluster, but in the process they made an unexpected discovery.

    In the outer fringes of the area observed with Hubble’s Advanced Camera for Surveys a compact collection of stars was visible...

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