Nov. 24 Astronomy Picture: Hubble Floats Free# Astronomy - 天文
r*o
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Explanation: Why put observatories in space? Most telescopes are on the ground.
On the ground, you can deploy a heavier telescope and fix it more easily.
The trouble is that Earth-bound telescopes must look through the Earth's
atmosphere. First, the Earth's atmosphere blocks out a broad range of the
electromagnetic spectrum, allowing a narrow band of visible light to reach
the surface. Telescopes which explore the Universe using light beyond the
visible spectrum, such as those onboard the Chandr
On the ground, you can deploy a heavier telescope and fix it more easily.
The trouble is that Earth-bound telescopes must look through the Earth's
atmosphere. First, the Earth's atmosphere blocks out a broad range of the
electromagnetic spectrum, allowing a narrow band of visible light to reach
the surface. Telescopes which explore the Universe using light beyond the
visible spectrum, such as those onboard the Chandr