Submillimeter Wave Astronomy Satellite

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Submillimeter Wave Astronomy Satellite (SWAS, also Explorer 74 and SMEX-3) is a NASA submillimetre astronomy satellite, and is the fourth spacecraft in the Small Explorer program (SMEX). It was launched on 6 December 1998, at 00:57:54 UTC, from Vandenberg Air Force Base aboard a Pegasus XL launch vehicle.

Excerpt from the Wikipedia article “Submillimeter Wave Astronomy Satellite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Auteur inconnu, Public domain, via Wikimedia Commons.