Astronomers Find Exomoon Candidate around Jupiter-Sized Exoplanet Kepler-1708b astronomy space science
as another example of an unexpectedly large exomoon candidate — echoing the surprise that hot-Jupiter discoveries elicited in the mid-1990s.
These alien worlds display remarkable diversity, from highly eccentric Jupiters to compact, coplanar systems of rocky planets. “It’s a stubborn signal. We threw the kitchen sink at this thing but it just won’t go away,” Professor Kipping said. “If one astronomer’s hypothesis is correct, the moons may have even started life as planets, only to be pulled into the orbit of an even bigger planet like Kepler-1625b or Kepler-1708b.”
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