The Mass of Our Galaxy Calculated from Its Rotational Speed

question 25

Short Answer

The mass of our galaxy calculated from its rotational speed is much larger than the mass of all the known matter within. Astronomers have proposed that ____________________ may provide the additional mass to explain this difference.

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Definitions:

Handout

A printed or digital document distributed to participants of a meeting, class, or presentation containing relevant information or exercises.

Reference Notes

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Backspace

A key on a keyboard that deletes any character to the left of the cursor's position and moves the cursor back one space.

Quick Access Toolbar

A customizable toolbar in some software applications that provides quick access to frequently used commands.