Strap-on rocket boosters and glasses: what they have in common

1. Step 1. Strap-on rocket boosters — is part of — R-7 rocket. Four first-stage boosters — the “cluster layout”.
2. Step 2. R-7 rocket — evolved from — V-2 rocket. The Soviet rocket programme began by studying the V-2 (the R-1 was its copy).
3. Step 3. V-2 rocket — has part — Gyroscope. A gyroscopic guidance system.
4. Step 4. Gyroscope — is part of — Space telescope. Pointing gyroscopes.
5. Step 5. Space telescope — is a kind of — Telescope. A space telescope is a telescope above the atmosphere, so air does not blur the view.
6. Step 6. Telescope — evolved from — Glasses. The first telescopes were assembled by spectacle makers.

Open Evothings