王岐山:全面从严治党 厚植党执政的政治基础
???
![]() Argo | |
![]() | |
?? ?? | |
---|---|
?? ?? | NASA |
?? ?? | ???? |
??? | 2020? ?? |
??? ?? | |
??? | ?? |
??? | RTG |
???? 2009? ??? ???? ??? ?? ?? ????.[1][2][3] ??? ??, ??, ???? ??? ??? ?????? ??? ?? ???? ??? ????, ?? ?? ??? ??? ??? ??? ???.[1] ?? ????? ??? ?? ??? ???? ????? ???? ?????.
??
[??]2020? ?? ???? ??? ??????, ???? ?? ????.
??, ??, ??
[??]??
[??]- ↑ ? ? Hansen, C. J.; ?. (2009? 8? 27?). “Neptune Science with Argo – A Voyage through the Outer Solar System” (PDF). 《Jet Propulsion Laboratory》. 2016? 11? 7?? ???.
A launch opportunity to the outer Solar System via Neptune opens in 2015 and lasts through the end of 2019, with backup options in 2020. It allows trajectories with reasonably short trip times to Neptune (8-11 years) and the Kuiper Belt (an additional 3-5 years), as well as low Triton approach speeds <17 km/sec.
- ↑ “Argo: Exploring the Neptune System and Beyond” (PDF). 《EPSC Abstracts》. European Planetary Science Congress. 2009. 2016? 11? 7?? ???.
- ↑ White Paper: Argo Mission to Neptune, Triton, and a KBO. Future Planetary Exploration, 30 August 2009.