Cotton candy planets? Scientists discover two giant worlds with astonishingly low density

An illustration depicting one of the planets. PIC COURTESY/NASA

Astronomers have identified two of the least dense giant planets ever measured, belonging to a rare class known as "super-puff" planets, and both are less dense than cotton candy.

The exoplanets - ‘TOI-791 b' and ‘TOI-791 c' - circle an F7-type dwarf star about 1110 light years from Earth in the southern constellation Volans.

Both worlds are approximately the size of Jupiter, but contain far less material than their dimensions suggest.

TOI-791 b has a density of only 0.038 grams per cubic centimeter, while TOI-791 c has a density of 0.047 grams per cubic centimeter. Cotton candy has a density of 0.05 grams per cubic centimeter.

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