Solved cryptogram
A probe launched in the seventies has passed beyond the bubble of wind blown by the sun.
Astronomy Facts, sourced to NASA.
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What it means
The sun blows a stream of charged particles that carves out a region called the heliosphere, and the boundary where it gives way to the gas between the stars is the heliopause. Voyager 1 crossed it in 2012, at over eighteen billion kilometers out, and Voyager 2 followed by a different route six years later. Both still report back, on transmitters weaker than a refrigerator bulb, across a gap where a signal takes many hours.
The claim comes from NASA.
- SourceNASA
- CollectionAstronomy Facts
- Difficultymedium
- Length71 letters, 19 unique
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