About how far is the Oort cloud from the Sun?

a. 3 to 5 AU
b. 45 to 60 AU
c. 100 to 1000 AU
d. 10,000 to 100,000 AU
e. 4.6 billion AU


d

Physics & Space Science

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The NASA SETI project canceled by Congress was renamed__________and completed using private funds

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Which of the following is TRUE?

A) Visible light makes up the greatest part of the electromagnetic spectrum. B) In a vacuum, electromagnetic waves all travel at the same speed, the speed of light. C) Ultraviolet light has the shortest wavelength of any electromagnetic wave. D) A blackbody emits all its radiation at a single wavelength or frequency. E) Electromagnetic waves cannot travel through empty space.

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The elements that hardly ever react with other elements to form compounds are called the ______________

Fill in the blank(s) with correct word

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At the end of December, all of the Southern Hemisphere is in

A) darkness. B) light. C) summer. D) winter.

Physics & Space Science