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2. What observation did astronomer Vesto Slipher make about the "nebulae" (galaxies) in the early 1900s?

A. They were all moving towards us.
B. They were all stationary.
C. They were all moving away from us.
D. Their distances could not be measured.

Sagot :

GinnyAnsweridn

Final answer:

Astronomer Vesto Slipher observed that all galaxies were moving away from us, revealing the concept of an expanding universe.


Explanation:

Astronomer Vesto Slipher observed that all galaxies (nebulae) were moving away from us in the early 1900s. This was a groundbreaking discovery that laid the foundation for our understanding of the expanding universe.


Learn more about Galaxies and expansion of the universe here:

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