ultra-hot jupiter

ultra- +‎ hot jupiter. From being a type of gas giant planet much hotter than most jupiter-class planets.

• ultra hot jupiter, ultrahot jupiter, ultra-hot Jupiter, ultra hot Jupiter, ultrahot Jupiter

ultra-hot jupiter (plural ultra-hot jupiters)

1. A giant planet, of similar mass to that of Jupiter, which orbits close enough to its sun to become tidally locked, and whose day-side atmosphere has therefore heated up so much, as to break apart most molecules, leaving atomic gas. The day-side atmosphere has the temperature and spectral characteristics of a star's surface.

• jovian
• jupiter
• jovian planet
• jupiter-class planet
• gas giant planet
• giant planet
• gas giant
• giant
• planet

• hot jupiter / hot Jupiter
• jupiter / Jupiter