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\nMystery of Galaxy’s Missing Dark Matter Deepens\n

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\n\nPublisher:\n\nNASA\n\n\n
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\nWhen astronomers using NASA’s Hubble Space Telescope uncovered an oddball galaxy that looks like it doesn’t have much dark matter, some thought the finding was hard to believe and looked for a simpler explanation. Dark matter, after all,...\nWhen astronomers using NASA’s Hubble Space Telescope uncovered an oddball galaxy that looks like it doesn’t have much dark matter, some thought the finding was hard to believe and looked for a simpler explanation.

Dark matter, after all, is the invisible glue that makes up the bulk of the universe’s contents. All galaxies are dominated by it; in fact, galaxies are thought to form inside immense halos of dark matter.

So, finding a galaxy lacking the invisible stuff is an extraordinary claim that challenges conventional wisdom. It would have the potential to upset theories of galaxy formation and evolution.

Credit: NASA's Goddard Space Flight Center
Paul Morris: Lead Producer
Andrea Gianopoulos: Science Writer
Tracy Vogel: Science Writer

Additional Visualizations:
Galaxy Motion Simulation: Credit: ESO/L. Calçada.
Dark Matter Simulation: Credit: Wu, Hahn, Wechsler, Abel(KIPAC), Visualization: Kaehler (KIPAC)

Music Credits:
\"Aphelion Horizon\" by Alistair Hetherington [PRS] via Atmosphere Music Ltd. [PRS], and Universal Production Music.



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Dark matter is the invisible glue that holds the universe together.
0:06










Galaxy Motion Simulation Observed With Dark Matter
0:16










Unlike observable matter, dark matter does not emit, absorb, or reflect light, making it hard to detect.
0:43










In 2018, galaxy NGC 1052-DF2 made headlines because it seemed to be missing dark matter.
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The observed number of stars in NGC 1052-DF2 accounted for most of the gravity.
1:18










A galaxy lacking dark matter is an extraordinary claim. It upsets theories of galaxy formation and evolution.
1:36














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Resource Details

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Media Length
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3:48
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Grade
3rd - 11th
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Subjects
All Subjects
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Media Type
Instructional Videos
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Source:
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\nNASA Goddard\n\n
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Date
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2021
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Language
English
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Audiences
For Teacher Use
2 more...
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Fine Print: Educational Use
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nasa, light, planets, space, water, energy, matter, nebula, stars, facts, society
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universe, alive, amazing, asteroid, atmosphere, beautiful, bennu, comet, cool, cosmos, dark, exoplanet, geek, historical, history, hubble, hubble space telescope, inspire, inspiring, interstellar, kepler, life, living, marvel, mission, nerd, pictures, planet, planetary, rocket, science, shuttle, strange, super, supernova, telescope, tess, wow
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