One of the most enigmatic features of Ceres is a high, solitary mountain, which the Dawn team scientists has nicknamed Ahuna Mons, a pyramid-shaped three mile high mountain and 15 km (10 mi) wide at the base.

Ceres has defied our expectations and surprised us in many ways, thanks to a year’s worth of data from Dawn,

Dawn deputy principal investigator Carol Raymond said in a statement.

This mountain first appeared in an image captured by Dawn spacecraft back in February 2015 from 46,000 km away of Ceres’ surface, a far away distant at that time, then it seemed as a tiny, bright-sided bump.

Now, Dawn’ recent image of the mountain, taken from low-altitude orbit 120 times closer than those captured in February 2015, gets a much sharper ‘look’ at the mountain, turning out, the feature is no small bump after all. In fact, its look as a dome with smooth, steep walls rises higher than mount Kilimanjaro, NASA scientists described it.

No one expected a mountain on Ceres, especially one like Ahuna Mons,

Chris Russell, Dawn’s principal investigator, said in the statement.

But how this moutain formed? Scientists do not have a satisfactory model to explain it. Though, the spacecraft will complete many low-altitude orbits to better view the entirety of Ceres’ surface, maybe then we could solve some of this dwarf’ secrets.

Raymond added:

We are hard at work on the mysteries the spacecraft has presented to us.