The search for exomoons orbiting planets outside our solar system has sparked a significant debate within the astronomical community, involving a pair of contrasting studies that presented divergent viewpoints on the existence of exomoons Kepler-1625b-i and Kepler-1708b-i.
Much like Schrödinger’s oddball cat that is both dead and alive inside a box, we won’t really know until someone goes and looks. But in a new paper recently uploaded to the arXiv preprint server, a team of astronomers led by David Kipping from Columbia University takes issue with the drama surrounding the ongoing exomoon search.
In 2017, Kipping, alongside Columbia University astronomer Alex Teachey, discovered the first possible exomoon candidate, Kepler-1625b-i, using the Hubble and Kepler telescopes. Years later, in 2022, Kipping, as well as astronomers from NASA, MIT, CalTech, UCLA, and other prominent institutions discovered a second possible exomoon, lovingly called Kepler-1708b-i.
For the astronomers, this was a home run. Not only were astronomers finding exoplanets out there, but finding exoplanets with exomoons. The team focused on known cold gas giants that were far away from their host stars, where the effect of the star’s gravity should not be enough to strip these gas giants of their exomoons. This makes sense. In our solar system, gas giants like Jupiter and Saturn have a lot of moons. It stands to reason that gas giant exoplanets could too.
In December of 2023, a study was published that dashed the exomoon theory against the proverbial lunar rocks. Published in Nature Astronomy, astronomers René Heller and Michael Hippke applied a new algorithm, called Pandora, to the previous exomoon research, and concluded, much like Obi-Wan Kenobi in Star Wars, that those were no moons.
It’s an astronomical roller coaster, and Kipping’s latest paper comes out swinging at Heller and Hippke.
“The reason they didn’t see them [the exomoons] is not because of the data (as they thought),” Kipping told The Debrief. “But it is actually because their algorithm for finding moons didn’t work properly.”
Hellbound and Down 