hot Jupiter

American

noun

Astronomy.

any of a class of large, hot, gaseous planets similar to Jupiter in mass but outside our solar system.

hot Jupiter Scientific

/ hŏt /

See under extrasolar planet

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Determining which of these two routes a specific hot Jupiter followed has been challenging.

From Science Daily • Dec. 15, 2025

For a hot Jupiter to have formed through high-eccentricity migration, this circularization time must be shorter than the age of its planetary system.

From Science Daily • Dec. 15, 2025

Silicates are exceptionally common — all the rocky bodies in the solar system are made from them, and silicates have previously been detected in the atmospheres of hot Jupiter exoplanets before.

From Scientific American • Oct. 20, 2023

Kelt-11b is a hot Jupiter that was first reported in 2017 with the Kilodegree Extremely Little Telescope.

From New York Times • Apr. 2, 2022

Hubble Space Telescope hot Jupiter transmission spectral survey: a detection of Na and strong optical absorption in HAT-P-1b.

From Nature • May 6, 2018

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023