- 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 planetsgalaxies
- black hole — A space object with very strong gravityblack holes, small black holes
- telescope — A tool to look at distant objectsX-ray telescope
- centre — The middle part of a galaxy or placecentres
- bright — Giving a lot of light or strong signal
- faint — Not bright, very weak, hard to see
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