Artemis Program

Measuring the Mass of the Universe Isn't As Simple as Astronomers Thought

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By system
August 29, 2026 • 46 views
Original source: Universe Today

How do scientists know the mass of the Universe? Measuring it has traditionally relied on knowing how many stars there are in galaxies, as well as clouds of gas and dust, and associated dark matter. Astronomers generally use the mass of the brightest stars to estimate the mass of an entire galaxy. T...

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