planetary

Example Sentences

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Researchers think these thick gaseous envelopes may have formed when the planets were much farther from their star, in colder regions of the protoplanetary disc where gas could rapidly accumulate around a solid planetary core.

From Science Daily • Jun. 27, 2026

Only four other planetary systems are known to contain multiple super-puff planets, making TOI-791 an exceptionally rare opportunity to investigate how these unusual worlds originate and evolve.

From Science Daily • Jun. 27, 2026

Because it formed around another star, 3I/ATLAS offers scientists a valuable chance to study material from a different stellar system and gain insights into how planets and planetary systems develop.

From Science Daily • Jun. 23, 2026

The findings are helping scientists better understand not only distant planetary systems but also the origins of our own Solar System.

From Science Daily • Jun. 13, 2026

Aristarchus was the first person to hold that the Sun rather than the Earth is at the center of the planetary system, that all the planets go around the Sun rather than the Earth.

From "Cosmos" by Carl Sagan