←back to thread

Feasibility study of a mission to Sedna – Nuclear propulsion and solar sailing

(arxiv.org)
200 points speckx | 1 comments | 01 Jul 25 14:08 UTC | HN request time: 0.207s | source
Show context
pavel_lishin ◴[01 Jul 25 14:46 UTC] No.44434403[source]▶
> Sedna is expected to pass through the perihelion of its orbit in 2075--2076 and then move again away from the Sun. Considering the distances involved, a mission targeting the object would need to be launched "relatively" soon, especially if using conventional propulsion systems, which could require up to 30 years of deep-space travel.

Sedna's perihelion is ~76 AU - more than twice as far as Pluto, which took New Horizons nearly a decade to reach.

Sedna's apehelion is over 500 AU.

> The Direct Fusion Drive rocket engine is under development at Princeton University Plasma Physics Laboratory

Is it ... is it actually working? How close are they? And even if they get it to work next year, will it be something well-engineered & reliable enough to send it into space for 10 years and expect it to work?

replies(6): >>44434556 #>>44434563 #>>44434787 #>>44434807 #>>44436120 #>>44439589 #
imglorp ◴[01 Jul 25 15:22 UTC] No.44434807[source]▶
And tragically, nuclear propulsion at NASA has been aggressively singled out for the axe so humanity will be counting on more advanced countries to finish that research.

Was that the fossil fuel lobby's doing?

replies(3): >>44436509 #>>44439076 #>>44440298 #
1. Robotbeat ◴[02 Jul 25 04:36 UTC] No.44440298[source]▶
Nuclear thermal was killed for pretty good reasons, one of which is the focus on nuclear-electric instead, which is better for this mission (along with a strong push by a refueled chemical stage in high Earth orbit).