5 · en
Short, simple sentences with “comets”, suitable for children and primary/elementary school, with common expressions and related words. You'll also find examples for middle and high school.
Halley's comet is one of the most well-known comets because it is the only one that can be seen with the naked eye every 76 years.
The spaceship soared through space at dizzying speeds, dodging asteroids and comets while the crew struggled to maintain their sanity amidst the infinite darkness.
Punctual as all comets are, it did appear on the predicted date, and science christened it Halley's comet.
In 1710, Edmund Halley - nicknamed "the discoverer of comets" - showed that comets were subject to laws, and that their motions seemed random because their orbits were so elongated.
Halley's interest in the motions in space did not end with comets. In 1718 he revealed that stars also move, a conclusion he reached after finding that Arthur, Sirius and Procyon had changed places since the time of the Greeks.
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