Proton 4
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The Proton (N-6) were a series of Soviet scientific satellites designed to study cosmic rays and charged particles in space. Only one satellite was launched in 1968, and it is still currently the heaviest scientific satellite ever launched in history (17 tons)
A Proton (N-6) satellite in low Earth orbit
| Proton N-6 (1968-1969) |
||
|---|---|---|
| Mission | Start | End |
| Proton 4 (N-6-1) | 1968-Nov-16 | 1969-Jul-24 |
| Heaviest scientific satellite ever launched in history (17,000 kg) | ||
| (N-6-2) | 1969? | |
| Cancelled. Further status unknown | ||
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