They don't compete with each other. Orbital rocket is engineering dice (and then ops when we try to build it, as well as presumably facilities for the launch apd), nuclear research is science dice. In fact, they synergize better than most of the other options - the remaining orbital work is tagged as [PHYS], and the nuclear science gives +4 to PHYS (the only competitor is Big Ear, which is too expensive in resources for us to take this year)
As an aside, I just checked and we can't do both R-1 and R-3 construction in the same term.
@Strunkriidiisk, you might want to change that?
[X] Plan: A bit of nuclear power for dessert
-[X] (3 dice) Construct an R-1 Snow (15R per dice, 3/35, costs 1 Build Capacity until complete)
--[X] And launch it (free action for Sounding Rockets) (gains Scientific Data, launch experience, results to show the people funding you) (Unlocks Weather Observation Campaigns)
--[X] And launch it (free action for Sounding Rockets) (gains Scientific Data, launch experience, results to show the people funding you) (Unlocks Weather Observation Campaigns)
--[X] And launch it (free action for Sounding Rockets) (gains Scientific Data, launch experience, results to show the people funding you) (Unlocks Weather Observation Campaigns)
--[X] And launch it (free action for Sounding Rockets) (gains Scientific Data, launch experience, results to show the people funding you) (Unlocks Weather Observation Campaigns)
-[X] (3 dice) Construct a Hangar Complex and Runway (20R per die, 29/250, +2 Operations dice, allows constructing spaceplane prototypes, launching and landing air and spacecraft)
-[X] (1 die) Construct a Wind Tunnel (10R per die, 37/80, +3 to projects labeled AERO)
-[X] (1 die) Build a Scientific Complex (25R per die, 363/450, opens up new research possibilities, +1d5+5 bonus in the associated field, +1 Education for the region
--[X] Dnipro Aerospace Metallurgy Centre (MATSCI) [Korolev]
-[X] (3 dice) Conduct Design Studies (R-4 Dawn) (Phase II) [AERO, PHYS, FUEL] (15R per die, 257/300 (Phase II), 0/300 (Phase III))
-[X] (3 dice) Nuclear Power Studies [PHYS] (15R per die, 0/400) (-15PS on completion, +4 to PHYS) (Opens further nuclear research)
-[X] Engineering Job Fair - (0/150, 5R per dice, -5R per turn on completion. Gain +1 Engineering dice)
-[X] (2 dice) There is Power in a Union (0/150, 5R per dice, -5R per turn and -5 PS on completion. Gain +1 Facilities dice, +5 to Facilities rolls)