低密度气态巨行星为何让天文学家惊讶
Some planets are huge but surprisingly light. Astronomers call the most extreme examples super-puff planets.
Two such gas giants travel around the same star. Their large size and small mass mean that their average density is lower than candy floss.
Inspired by a public Nature title/summary · Rewritten by Vocabsavvy · Vocabsavvy Original (public-snippet inspired)