NASA's Dawn probe took the new images of Ceres' southern hemisphere

Here Are NASA's Closest Ever Photos Of The Mysterious Dwarf Planet  Ceres.

A NASA spacecraft has just beamed home photos taken of the dwarf planet Ceres from its closest-ever vantage point,
giving scientists a more detailed view of the cratered world's terrain than ever before. 
NASA's Dawn probe took the new images of Ceres' southern hemisphere from an orbit that brings it about 240 miles from the dwarf planet's surface — about 10 miles closer than the International Space Station is to Earth in its average orbit.
A few features stand out in these new images. For one, Ceres appears to have a bit of "fracturing" across its surface that is likely caused by impacts and even past tectonic activity from within the dwarf planet that caused its crust to break up, NASA said.
"Why they are so prominent is not yet understood, but they are probably related to the complex crustal structure of Ceres," Paul Schenk, Dawn science team member, said in a statement.

Earlier in its mission, Dawn caught sight of some strange reflective spots in craters on Ceres, the largest body in the main belt of asteroids between Mars and Jupiter. 
Initially, scientists working with the spacecraft couldn't find the source of the mysterious bright patches, but now they think they've solved the mystery: The spots appear to be caused by salt deposits in the craters.
Some researchers also think that Dawn data suggests Ceres has ammonia — an element often found in the outer solar system — in its composition. This could mean that Ceres formed from material originally in the outer solar system or even migrated in from farther out in the cosmic neighborhood, NASA said, though none of that is conclusive yet.

"As we take the highest-resolution data ever from Ceres, we will continue to examine our hypotheses and uncover even more surprises about this mysterious world," Chris Russell, Dawn's principal investigator, said in the statement.
Dawn arrived at Ceres in March 2015 after orbiting Vesta — an astroid in the main belt — for a bit more than a year. It is the first spacecraft to ever visit Ceres.