What do scientists currently lack evidence for in the Milky Way Galaxy?

The existence of exoplanets

Life on other planets

Galaxies being far away

The speed of light

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What are groups of stars that form recognizable patterns called?

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Which of the following is a reason why constellations were important in ancient times?

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What is the main source of light for stars?

Q4.

Which constellation is known as 'The Big Dipper'?