Messier 8 (Lagoon Nebula)) Open cluster Sagittarius 18h 05m −24° 22′ 4.7 6531 Messier 21 Open cluster Sagittarius 18h 04m −22° 29′ 6.0 6537 Red Spider...
38 KB (226 words) - 02:20, 29 September 2024
Groundwave Communications System (PGCS)" on 25 August 1981. The name of this proposed network system was changed from PGCS to Groundwave Emergency Network...
13 KB (1,522 words) - 16:15, 19 October 2024
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6 KB (381 words) - 17:11, 28 August 2024
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7 KB (532 words) - 19:23, 13 April 2024