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Study: Many small galaxies may lack central black holes — Level A1 — an artist's impression of a black hole in the sky

Study: Many small galaxies may lack central black holesCEFR A1

15 Dec 2025

LevelA1A2B1B2

Adapted from U. Michigan, Futurity • CC BY 4.0

Photo by Aman Pal, Unsplash

Level A1 – Beginner
2 min
80 words
  • Scientists studied many different galaxies in space.
  • They used an X-ray telescope to look.
  • The team searched for black holes at centres.
  • Many big galaxies show bright X-ray signals.
  • Bright X-rays mean material falls onto black holes.
  • Small galaxies often do not show bright X-rays.
  • This suggests many small galaxies lack black holes.
  • Some small black holes are just too faint.
  • Future space missions may check these ideas.
  • The finding changes how scientists think about origins.

Difficult words

  • galaxy — A large group of stars and planets
    galaxies
  • black hole — A space object with very strong gravity
    black holes, small black holes
  • telescope — A tool to look at distant objects
    X-ray telescope
  • centre — The middle part of a galaxy or place
    centres
  • bright — Giving a lot of light or strong signal
  • faint — Not bright, very weak, hard to see

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Have you seen a picture of a galaxy?
  • Would you like to look with a telescope?
  • Do you think small places can lack big objects?

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