Beschreibung : Noordwijk Seal. IRAS was the first observatory to perform an all-sky survey at infrared wavelengths. It mapped 96% of the sky four times. Its mission lasted ten months. The telescope was a joint project of the United States (NASA), the Netherlands (NIVR), and the United Kingdom (SERC). Over 250,000 infrared sources were observed.

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IRAS (SATELLITE) · DELTA 3910