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The Einstein Observatory (also known as HEAO-2 or HEAO-B) was operational from 1978 November 13 until 1981 April 25 when the attitude control system failed. The Solid State Spectrometer (SSS) was...
Search relevance: 255.64 | Views last month: 4 | Catalog Last Checked: November 03, 2026 at 11:50 PM -
The Einstein Observatory (also known as HEAO-2 or HEAO-B) was operational from 1978 November 13 until 1981 April 25 when the Einstein attitude control system failed. The Monitor Proportional...
Search relevance: 184.25 | Views last month: 1 | Catalog Last Checked: November 03, 2026 at 11:48 PM