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What is the mass of the universe? How was this determined?

Answer 1

#6*10^51 kg#

A total mass of the visible matter of about #6*10^51 kg#

The mass density of visible matter (i.e., galaxies) in the Universe is estimated at #3*10^-28 (kg)/m^3^#. The radius of the visible Universe is estimated at #1.7*10^26 m#. Plus or minus 20 percent. Therefore, you can compute the mass of the universe.

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Answer 2

Levi Anderson

Based on observations of cosmic microwave background radiation, galaxy clustering, and gravitational effects on visible matter and dark matter, the mass of the universe is estimated to be approximately 3 × 10^52 kilograms.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.