Space & Astronomy

Telescopes Above the Atmosphere

A talk about why telescopes are sent into space and what Hubble and Webb have revealed.

B29 min

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1Telescopes on the ground must look through the air, which blurs the picture.

2A telescope in space sits above the atmosphere and sees much more clearly.

3The Hubble telescope has circled the Earth for more than thirty years.

4Its photographs helped scientists discover that the universe is expanding faster and faster.

5The newer Webb telescope was built to study infrared light that our eyes cannot see.

6With it, astronomers can watch the first galaxies that formed after the Big Bang.

7The golden mirror of the telescope is wider than a tennis court is long.

8It must stay extremely cold, so a huge shield blocks the heat of the Sun.

9Each new picture from space teaches us something surprising about our cosmic neighbourhood.

10Future telescopes may one day photograph planets like Earth around other stars.

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