How Ion Propulsion Powers Deep Space Missions
Ion propulsion pushes a spacecraft by firing charged gas at high speed. Here is how ion and Hall thrusters work, and why they trade thrust for efficiency.
Space Technology
How spaceflight actually works, and where it is going. Rocket engines and propulsion, plus the frontier technologies, space tourism, mining, and the space elevator, that could reshape orbit.
How a Rocket Engine Turns Fuel Into Thrust
A rocket engine makes thrust by pushing hot gas out of a nozzle. Here is how liquid and solid engines differ, and what thrust and specific impulse mean.
The engineering behind everything in orbit
Every capability covered on OrbitalIntel rests on a stack of hard engineering: the propulsion that gets mass to orbit and moves it around once there, and the materials and systems that keep spacecraft working in a vacuum bathed in radiation. This section explains that technology in plain language, from the engines flying today to the concepts still on the drawing board.
Propulsion is where it starts. Our explainer on how rocket engines work covers the chemistry and physics of chemical rockets, the difference between liquid and solid engines, and why a number called specific impulse decides how far a rocket can go. From there, ion propulsion shows how electric thrusters trade brute thrust for extraordinary efficiency to move satellites and deep-space probes, and nuclear propulsion explains the reactors that could cut the trip time to Mars.
The frontier
Beyond propulsion, a set of technologies keeps appearing in headlines and funding rounds. Space tourism has already flown paying passengers on suborbital and orbital trips, and we explain the difference and what a flight involves. Space mining looks at the real resources, and the legal and physical obstacles, behind the idea of extracting water and metals from asteroids and the Moon. And the space elevator is the century-old concept that keeps failing on one stubborn problem: no known material is strong enough to build the tether.
Grounded, not breathless
Space technology attracts more hype than almost any field. We try to keep the two apart, explaining how a technology would work, what has actually been demonstrated, and what is still speculative. Where a concept is decades away or may never be practical, we say so rather than dressing a press release up as a product. The rockets that carry this technology are covered in our launch section.
How to use this section
Start with rocket engines if you want the fundamentals of how anything reaches space, then branch into propulsion or the frontier topics that interest you. Each page is written to stay accurate as the field moves, with time-sensitive claims marked and hedged.