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The
Telescope for Invisible Stars |
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The Telescope for Invisible Stars
It's no secret that space is cold. But in some places, it's so frigid
that light can't radiate in the visible spectrum, which makes celestial
bodies invisible. Now the Herschel Space Observatory is exposing
them. Launched in May by the European Space Agency, Herschel scans
the skies in the infrared spectrum. In order to avoid infrared interference
and temperature fluctuations from Earth, it hovers in space at the
second Lagrange point, about 930,000 miles (1.5 million km) away,
where the gravity of the Earth and sun balance out. Herschel will
operate for at least three years, during which it will watch stars
and planets being born, revealing more about how the universe came
to be.
Herschel is equipped with a mirror 11.5 ft. (3.5 m) in diameter,
the largest ever built for use in space. The spacecraft itself is
nearly 25 ft. (7.5 m) tall
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