Voyager 2 is a space probe launched bi NASA on August 20, 1977 tae study the ooter planets. Pairt o the Voyager programme, it wis launched 16 days afore its twin, Voyager 1, on a trajectory that teuk langer tae reach Jupiter an Saturn but enabled further encoonters wi Uranus an Neptune. It is the anly spacecraft tae hae ever veesited either o the ice giants.
|Mission teep||Planetary exploration|
|Operator||NASA / JPL|
42 years, 2 months and 1 day elapsed|
Planetary mission: 12 years, 1 month, 12 days
Interstellar mission: 30 years and 19 days elapsed (continuing)
|Manufacturer||Jet Propulsion Laboratory|
|Launch mass||825.5 kilograms (1,820 lb)|
|Stairt o mission|
|Launch date||August 20, 1977, 14:29:00UTC|
|Launch steid||Cape Canaveral LC-41|
|Fleebi o Jupiter|
|Closest approach||Julie 9, 1979, 22:29:00 UTC|
|Distance||570,000 kilometers (350,000 mi)|
|Fleebi o Saturn|
|Closest approach||August 25, 1981, 03:24:05 UTC|
|Distance||101,000 km (63,000 mi)|
|Fleebi o Uranus|
|Closest approach||Januar 24, 1986, 17:59:47 UTC|
|Distance||81,500 km (50,600 mi)|
|Fleebi o Neptune|
|Closest approach||August 25, 1989, 03:56:36 UTC|
|Distance||4,951 km (3,076 mi)|
- "VOYAGER:Mission Information". NASA. 1989. Retrieved January 2, 2011.
- "Voyager 2". US National Space Science Data Center. Retrieved 25 August 2013.
- "VOYAGER 2". N2YO. Retrieved 25 August 2013.
- Butrica, Andrew. From Engineering Science to Big Science. p. 267. Retrieved 2015-09-04.
Despite the name change, Voyager remained in many ways the Grand Tour concept, though certainly not the Grand Tour (TOPS) spacecraft. Voyager 2 was launched on August 20, 1977, followed by Voyager 1 on September 5, 1977. The decision to reverse the order of launch had to do with keeping open the possibility of carrying out the Grand Tour mission to Uranus, Neptune, and beyond. Voyager 2, if boosted by the maximum performance from the Titan-Centaur, could just barely catch the old Grand Tour trajectory and encounter Uranus. Two weeks later, Voyager 1 would leave on an easier and much faster trajectory, visiting Jupiter and Saturn only. Voyager 1 would arrive at Jupiter four months ahead of Voyager 2, then arrive at Saturn nine months earlier. Hence, the second spacecraft launched was Voyager 1, not Voyager 2. The two Voyagers would arrive at Saturn nine months apart, so that if Voyager 1 failed to achieve its Saturn objectives, for whatever reason, Voyager 2 still could be retargeted to achieve them, though at the expense of any subsequent Uranus or Neptune encounter.