Mariner 2 and 4
eatpizzaRocket

DLC not required
Vostok
eatpizzaRocket

DLC not required
Scud Missle
eatpizzaRocket

DLC not required
Vanguard
eatpizzaRocket

DLC not required
Sputnik
eatpizzaRocket

DLC not required
Goddard 1
eatpizzaRocket

DLC not required
Tanker |Fueler| (non-DLC)
nickforrestStation

DLC not required
STS (non-DLC)
nickforrestStation

DLC not required
Shorty
nickforrestRocket

DLC not required
Rover Delivery Rocket(non-DLC)
nickforrestRover

DLC not required
Moon having 5 moons(read desc)
samimposterMore Planets

DLC not required
Milky Way galaxy
10293847565647382910sidnikCustom Solar System

DLC not required
Realistic starship
frontiersfsjmRocket

DLC not required
Hawk Engine Mk2
guywhomakesbpsRocket

DLC not required
Glaze V
GlazyRocket

DLC not required
New Shepard
bot124Rocket

DLC not required