#sedna — Public Fediverse posts

#Sedna conjunct #Uranus this month. And this critter shows up on May 1. (I walk my pups on the beach almost daily year round - I get to see a seal every few years!)
Folks who know the story behind Sedna will get the reference.
#MayDay #Beltane #FlowerMoon #Seal

Evidence of controversial #Planet9 uncovered in sky surveys taken 23 years apart
If the object really is #PlanetNine, it would be larger than Neptune and exist 700 times further from the sun than Earth.
Planet Nine was put forward in 2016 by Michael Brown and Konstantin Batygin of the California Institute of Technology to explain an unusual bunching of orbits of some objects in the #KuiperBelt, such as #Sedna.
https://www.space.com/astronomy/solar-system/evidence-of-controversial-planet-9-uncovered-in-sky-surveys-taken-23-years-apart

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

https://arxiv.org/abs/2506.17732

#HackerNews #FeasibilityStudy #Sedna #Mission #NuclearPropulsion #SolarSailing #SpaceExploration