FE Meme
Rockets in Space Move What Backwards?
#1: Rockets on Earth move air backwards, so in space, with no air, a rocket has nothing to push against.
The Meme
Two-panel cartoon: shuttle in blue sky (top) vs shuttle above Earth in space (bottom). Impact-font captions frame the panels.
Why It Spreads
The two-panel cartoon makes the shuttle look helpless once the blue sky turns black, as if "nothing to push against" is the obvious punchline. Launch-pad exhaust kicking up smoke trains viewers to picture propulsion as shoving air backward, so the space panel feels like a one-glance physics win without naming reaction mass.
What It Gets Wrong
The two-panel cartoon treats every engine like a jet that shovels air backward, but rocket thrust follows F = ṁv from expelled propellant alone, with no intake required. Vacuum test stands, ion thrusters, and attitude jets all measure newtons of thrust in near-vacuum, which fits reaction-mass physics and is inconsistent with the claim that space offers nothing to push against. TestTheGlobe's ISS Footage Shows Real Zero-G and TestTheGlobe's Satellite Visibility walk through the observations and predictions this image skips.
The Debunk
Newton's third law predicts thrust from F = ṁ × v_exhaust even in vacuum; that fits test-stand firings, deep-space probes, and orbital manoeuvres. Treating rocket exhaust as air-shoveling is inconsistent with measured acceleration above the atmosphere. Use TestTheGlobe's Satellite Visibility to compare the meme's claim with a measurable prediction.
- TestTheGlobe's ISS Footage Shows Real Zero-G: a rocket engine expels mass backward at exhaust velocity; the reaction force on the vehicle does not require surrounding air to push against.
- TestTheGlobe's ISS Footage Shows Real Zero-G documents attitude thrusters and ion drives firing in near-vacuum, producing thrust from millinewtons to newtons with no air medium.
- The two-panel cartoon contrasts blue-sky launch with orbital vacuum but skips the physics: thrust scales with mass flow rate and exhaust speed, the same principle measured on vacuum test stands.
- TestTheGlobe's Satellite Visibility tool lets you predict when bright objects like the ISS pass overhead, consistent with hardware that reached orbit by reaction thrust, not by pushing air.