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Scientists Find Missing Oxygen in Small Galaxies

A study of 37 small galaxies found less oxygen than scientists expected.

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Science news editorial illustration for Hubble Study Finds Missing Oxygen in Dwarf Galaxies

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have 37 our . They they .

. The of it of a .

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do not of the is. It be in the , or it have .

Source: NASA, 2026-11-02.

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Read and understand · 1/3What did the scientists find in the 37 small galaxies?

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Less oxygen than they expected.. The first paragraph says they found less oxygen than expected.

Clue: Scientists have studied 37 small galaxies near our own. They found less oxygen there than they expected.

Read and understand · 2/3What do researchers think can push oxygen out of a galaxy?

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Powerful star explosions. The second paragraph points to powerful star explosions.

Clue: Stars make oxygen. The researchers think powerful star explosions can push some of it out of a galaxy.

Read and understand · 3/3What do scientists still need to learn?

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Where most of the missing oxygen is. The final paragraph says the missing oxygen’s exact location is still unknown.

Clue: Scientists still do not know exactly where most of the missing oxygen is. It may be in gas around the galaxies, or it may have travelled farther away.

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What might push oxygen out of the galaxies, and what remains unknown about it?

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Powerful star explosions might push oxygen out. Scientists do not yet know where most of the missing oxygen is.

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