Games like Space Query
Games like Space Query include Kerbal Space Program, Universe Sandbox, Elite Dangerous, X4: Foundations, and Spaceflight Simulator. We matched them by the tags players give Space Query on Steam (Simulation, Space Sim, Education, Exploration, and 3D): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Simulation · Space · Space Sim

Universe Sandbox
Shared: Simulation · Space Sim · Space

Elite Dangerous
Shared: Space Sim · Simulation · Exploration

X4: Foundations
Shared: Simulation · Space Sim · Space

Spaceflight Simulator
Shared: Space Sim · Simulation · Space

Kerbal Space Program 2
Shared: Exploration · Space · Simulation

Empyrion - Galactic Survival
Shared: Simulation · Space · Space Sim

Space Engineers
Shared: Simulation · Space · Physics

Hardspace: Shipbreaker
Shared: Simulation · Space · Physics

EVE Online
Shared: Space Sim · Exploration · Simulation

Universe Sandbox
Shared: Simulation · Education · Space

Solar Expanse - Space Exploration Manager
Shared: Simulation · Space · 3D

Avorion
Shared: Space Sim · Exploration · Space

PC Building Simulator
Shared: Simulation · Education · 3D

SpaceEngine
Shared: Space Sim · Space · 3D

V: Rings of Saturn
Shared: Space · Exploration · Space Sim

X Rebirth
Shared: Simulation · Space Sim · Space

Reentry - A Space Flight Simulator
Shared: Simulation · Space Sim · Space

Stellaris
Shared: Space · Simulation · Exploration

No Man's Sky
Shared: Exploration · Space · Singleplayer

Goat Simulator 3
Shared: Simulation · Exploration · Physics

Steam Engine Simulator
Shared: Simulation · Education · Physics

Starfield
Shared: Space · Exploration · Singleplayer

Take On Mars
Shared: Simulation · Exploration · Space