International Space Station
The International Space Station is a large habitable satellite that orbits Earth and serves as a research laboratory.
28,160 km/hSpeedEveryday quantities
International Space Station vs Light in vacuum
What are they, and what does the difference actually look like?
Two things. One honest scale.
Meet the pair
What these two things are
Light in vacuum
Light in vacuum is electromagnetic radiation that travels through empty space without any material medium.
1 cSpeedLight in vacuum moves about 38,300 times as fast as International Space Station.
01
International Space Station28,160 km/hSpeed
02
Light in vacuum1 cSpeed
Each track shows distance covered in the same second. The small illustrations identify the movers; their sizes are schematic.
Measurements, assumptions & sources +
International Space Station
NASA’s rounded 17,500 mph orbital-speed figure. This is motion around Earth, not speed relative to an astronaut inside.
NASA — International Space Station
The marked speed is calibrated. Unmeasured illustration details are representative.
Light in vacuum
Exactly 299,792,458 metres per second in vacuum. Light travels more slowly through materials.
NIST — 2022 CODATA fundamental constants
The marked speed is calibrated. Unmeasured illustration details are representative.
Change the comparison
Put something else beside it.
Measurement details
Why these numbers?
The visual compares speed with speed. The records below preserve each value’s basis and caveats.
International Space Station
28,160 km/hSpeed · approximate
NASA’s rounded 17,500 mph orbital-speed figure. This is motion around Earth, not speed relative to an astronaut inside.
Light in vacuum
1 cSpeed · exact
Exactly 299,792,458 metres per second in vacuum. Light travels more slowly through materials.
- Comparing
- Speed ↔ Speed
- Relative size
- Light in vacuum is larger on this measurement by a factor of about 38,300.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- International Space Station is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.
There’s always another scale
Follow your curiosity.
MotionInternational Space Station28,160 km/hThe International Space Station is a large habitable satellite that orbits Earth and serves as a research laboratory.MotionLight in vacuum1 cLight in vacuum is electromagnetic radiation that travels through empty space without any material medium.
MotionWalking1.389 m/sWalking is a form of human locomotion where one foot is always in contact with the ground.MotionSound in air1,235 km/hSound in air is the propagation of pressure waves through the atmosphere, which can be heard by humans and animals.Side by side
Another point of view.
