Mondo Knows Facts
Radar tracks tens of thousands of pieces of debris
Millions more fragments are too small to follow but still damaging Ground radars and optical telescopes catalogue objects larger than about 10 centimetres in low orbit. A paint fleck at 8 kilometres a second can pit a window, and a bolt can disable a satellite. Operators issue conjunction warnings and sometimes move spacecraft out of the way. It sits in Mondo's space collection, one of 200 facts that each trace back to the reference below.
Where this comes from
Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
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More facts like this
Kessler described a collision cascade in 1978Enough debris would produce more debris faster than it falls out of orbitThere are five gravitational parking spots near EarthAt L4 and L5 a spacecraft can hold a stable position with minimal fuelA comet's tail points away from the SunThe ions are pushed by the solar wind, not dragged behind the motionGeostationary satellites sit 35,786 kilometres upAt that height one orbit takes a day, so the craft appears to hang stillMars launch windows open about every 26 monthsSpacecraft wait for the planets to line up along an elliptical pathAstronauts on the station are not escaping gravityThe station falls around Earth where gravity is about 90 percent of surface strength
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Tags: debris, safety, orbits
Radar tracks tens of thousands of pieces of debris: the short answers
- Where does this come from, and can I check it?
- Millions more fragments are too small to follow but still damaging. The figure is taken from ESA Space Debris, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a space fact?
- Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.