So just what are those white spots on Ceres? As NASA’s Dawn spacecraft begins its scientific orbit of the dwarf planet, that’s the big mystery on everyone’s minds, and hopefully we’ll have an answer soon.

It’s prompted NASA’s Jet Propulsion Laboratory (JPL) in California to create a public poll asking people what they think those strange spots are, according to a Discovery News report.

A web page on the JPL’s website titled “What’s the spot on World Ceres?” asks visitors to guess what the unusual spots on Ceres are.

“Until Dawn gets a closer look over the next few months, it’s anyone’s guess what those spots could be,” it says. “So, go ahead! Cast your vote below.”

Below that paragraph are six icons for each of the options: volcano, geyser, rock, ice, salt deposit, and other. As of this writing, ice was leading the voting at 33 percent followed by other at 28 percent. Rock was scoring the lowest at 8 percent.

Dawn spotted the strange spots well before arriving at Ceres, and scientists have been scratching their heads trying to guess what they could be. Some suggested a cryovolcanic feature, but there was no relief feature associated with them, which would suggest a vent or a crack. Other theories include reflective minerals or salt deposits.

Dawn has now entered its science orbit, so perhaps the mystery will finally be laid to rest.

The Dawn spacecraft was launched in September 2007 with the mission of studying two of the three protoplanets in the asteroid belt, Vesta and Ceres. It has already visited Vesta, which it departed in 2012 and headed for Ceres, making it the first spacecraft to visit two celestial bodies.