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
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The NASA SETI project canceled by Congress was renamed__________and completed using private funds
A) Project Phoenix B) Gemini Program C) Project Constellation D) Landsat program
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.
The elements that hardly ever react with other elements to form compounds are called the ______________
Fill in the blank(s) with correct word
At the end of December, all of the Southern Hemisphere is in
A) darkness. B) light. C) summer. D) winter.