Astronomers have discovered a ultra hot Jupiter with extreme conditions. Credit: Haven Giguere, Nikku Madhusudhan

Absence of Hot Jupiters Around Aged Stars

Recent research may have just unraveled the enigma behind this cosmic absenteeism, shedding light on the transient nature of hot Jupiters as stars age.


As the cosmos unfolds its mysteries, the discovery of exoplanets has brought forth a plethora of intriguing phenomena. Among these are hot Jupiters, colossal gas giants that whirl around their stars in mere days, a spectacle absent in the vicinity of our mature sun. Recent research may have just unraveled the enigma behind this cosmic absenteeism, shedding light on the transient nature of hot Jupiters as stars age. (Check out our article “10 things about Jot Jupiters,” to learn more about them)

Cosmic Dichotomy: Super-Earths and Hot Jupiters

The celestial realm beyond our solar system is home to two unique classes of exoplanets – super-Earths and hot Jupiters. While the existence of a super-Earth within our solar abode remains a possibility, the conspicuous absence of a hot Jupiter orbits around our sun piqued the curiosity of astronomers. This absence becomes particularly riveting given the commonality of hot Jupiters around red dwarf stars, propelling scientists to delve deeper into this cosmic dichotomy.


The voyage for comprehension led researchers to the California Legacy Survey, where a scrutinized sample of 382 sun-like stars became the focal point. Analyzing factors such as metallicity and stellar age, a significant revelation emerged. Among the stars hosting gas giants, a distinct preference for cold Jupiters over their hotter counterparts was noted, especially as stars aged. The statistical analysis revealed a tapering presence of hot Jupiters as stars transitioned into their midlife, around the 6-billion-year mark.

The Transient Dance: Hot Jupiters’ Fading Embrace

The findings propose a narrative of celestial transience. Unlike the enduring orbits of cold Jupiters, the hot Jupiters seem to undergo a destabilization, gradually spiraling into their stellar hosts as time marches on. This dance of cosmic fate elucidates why our sun, in its middle age, is devoid of a hot Jupiter companion, and perhaps never embraced one.

This research not only demystifies the absent hot Jupiter but accentuates our solar system’s uniqueness in a cosmos brimming with red dwarfs and their hot Jupiter companions. As the quest for understanding our cosmic neighborhood continues, the unraveling of such enigmatic phenomena propels us closer to deciphering the vast tapestry of planetary systems.


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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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