There are different worlds outside our solar system.

Distant alien planets, called exoplanets, can be gas giants like Jupiter, rocky spheres the size of our planet, or even “super-fluffy” with the density of cotton candy.

But there is a mysterious gap in which there should be planets about 1.5-2 times the width of Earth, writes Business Insider. A study published in The Astronomical Journal may reveal the mystery of missing exoplanets. The mysterious hole where the planets should be

Among the more than 5,000 exoplanets discovered by NASA, there are many super-Earths (which are 1.6 times wider than our