Famous Telescope Fails to Penetrate Mysterious Planets, Resembling Cotton Candy
American scientists have determined that the James Webb Space Telescope is unable to penetrate a dense atmospheric layer surrounding three exoplanets, hindering efforts to understand their composition. The planets, designated 51b, 51c, and 51d, reside in the Kepler-51 system, initially discovered by NASA’s Kepler Space Telescope.
The exoplanets are comparable in size to Saturn but possess a significantly lower density – no more than 5.6 times the mass of Earth, compared to Saturn’s mass which is 95 times that of Earth. This discrepancy has puzzled researchers, leading to the description of their density as being akin to “cotton candy,” according to reports.
“These ultra-low density planets are rare and challenge our traditional understanding of how gas giants form,” stated Jessica Lipper-Roberts of the University of Tampa in Florida, who led the research team. “If explaining the formation of one of these is difficult, this system contains three.”
The formation of gas giants like Jupiter and Saturn typically involves the initial development of large, dense cores exceeding ten times the mass of Earth. These cores then attract substantial amounts of gas from the surrounding protoplanetary disk. Yet, in the Kepler-51 system, the planets appear to have comparatively small cores enveloped by extensive gaseous atmospheres.
Researchers utilized the Near-Infrared Spectrograph (NIRSpec) instrument on the James Webb Space Telescope in an attempt to analyze the atmospheric composition of Kepler-51d, but the dense haze proved impenetrable. The telescope’s inability to penetrate the haze limits the ability to determine the planets’ composition and formation history.
The unusual characteristics of the Kepler-51 planets raise questions about the mechanisms responsible for accumulating such a large volume of gas around relatively small cores. The findings suggest that current models of gas giant formation may be incomplete or require refinement.