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Question 2:
What is the advantage of viewing M16, the Eagle Nebula, in both visible light and near-infrared light?
Answer:

The visible-light image provides a detailed view of the stars, gas, and dust within the nebula. The near-infrared light can penetrate much of the gas and dust, revealing stars behind the nebula as well as hidden away inside the pillars. Some of the gas and dust clouds are so dense that even the near-infrared light cannot penetrate them. By using both types of light, astronomers can get a more complete picture of where and how stars are forming in the nebula.

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