hot Jupiter

(redirected from Ultra-short period planets)

hot Jupiter

n.
An extrasolar gas giant planet having a mass that is equal to or greater than that of Jupiter and a high surface temperature resulting from a very close orbit with its star.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
The astronomers, led by Dr Kailash Sahu, from the Space Telescope Science Institute in Baltimore, Maryland, US, wrote: "Five candidates have orbital periods below one day ( constituting a new class of ultra-short period planets, which occur only around stars of less than 0.88Msun.