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Chasing Pluto's shadow

22. June 2011, 22.44
Astronomers on board SOFIA fly over most of the water vapour in the atmosphere; it is precisely this that makes the desired infrared observations possible. But the fact that SOFIA flies has another major advantage: it is a mobile observatory. In contrast to ground-based observatories, it can be used at different locations around the globe. This can be very useful, for example, for the Pluto occultation that will take place these days.
Henning Krause
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Henning Krause