Galaxies

Galaxies are vast systems of stars, gas, dust, and dark matter bound together by gravity. They are the fundamental building blocks of the universe, ranging from dwarf galaxies with a few billion stars to massive ones with trillions.

Why it’s in the news: Galaxies are in the news due to new discoveries from the James Webb Space Telescope revealing their formation, size, and behavior in unprecedented detail.

Latest on Galaxies

• Galaxies tangled in science and spirit | Space photo of the day for Sept. 7, 2026
• What happens when a galaxy's supermassive black hole turns off? These dying radio galaxies could show us
• James Webb Space Telescope finds 'hidden stars' making the universe's 1st galaxies much bigger than we knew
• Black holes buried in mysterious 'little red dot' galaxies could blast cosmic ghosts at Earth
• James Webb Space Telescope catches 6 galaxies merging into one of the largest galaxies in the universe

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