Why Do Astronomers Prefer to Put Infrared Telescopes on High-Flying

question 45

Multiple Choice

Why do astronomers prefer to put infrared telescopes on high-flying airplanes or on satellites in space?

• A) because no infrared radiation can exist anywhere near the Earth's surface
• B) because the water vapor in the lower atmosphere is very good at absorbing infrared
• C) because high up the Sun's energy can be used to heat the infrared telescope
• D) because that way they are significantly closer to the objects they observe
• E) You can't fool me, all infrared telescopes are located on the Earth's surface
• Section 6.6: The Future of Large Telescopes

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