Hailey's comet is visible after every_________?
Correct answer: B. 76 years
- A. 84 years
- B. 76 years
- C. 1000 years
- D. 365 years
Explanation
Halley's Comet returns approximately every 75 to 76 years because that is its orbital period around the Sun. Its recorded returns are therefore measured in decades, not centuries.
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Astronomy covers the structure and motions of the solar system, planets, satellites, comets, asteroids and meteoroids, together with gravity, eclipses, seasons and phases of the Moon. It also introduces stars, galaxies, nebulae, black holes, space telescopes and satellites, while distinguishing rotation from revolution and meteors from meteorites.
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