Sus­pected ex­o­moon spot­ted

Ke­pler and Hub­ble have de­tected ev­i­dence of the first known moon out­side our So­lar Sys­tem

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NASA’S Ke­pler and Hub­ble space tele­scopes may have found a moon or­bit­ing the ex­o­planet Ke­pler-1625b, around 8,000 lightyears away in the con­stel­la­tion of Cygnus. Its pres­ence has been de­tected in a sim­i­lar way to how ex­o­plan­ets are found via the tran­sit method, where as­tronomers mea­sure how much a star’s light ap­pears to dim when an ob­ject passes in front of it. While fur­ther data is needed to con­firm its ex­is­tence, the ini­tial find­ings sug­gest it's about the size of Nep­tune and may have formed through a com­pletely dif­fer­ent process to any of the moons we know of.

The Nep­tune-sized ex­o­moon is thought to or­bit a gi­ant Jupiter-like planet in the Ke­pler-1625 sys­tem

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