The Great White Spot of Ceres

Dawn is approaching Ceres.  In just over a month, on March 6th, Dawn will enter orbit around the largest asteroid and one of the so-called dwarf planets.  It’s 952 km in diameter, which is pretty big for an object that isn’t quite a planet.  It’s relatively spherical, as well.

There are many mysteries that will be addressed as Dawn orbits Ceres, including whether it may have a possible liquid water ocean lurking beneath its icy crust, and if it’s venting water vapour into a possible tenuous atmosphere.  But the big thing that many people are wondering is what’s that bright spot?

PIA19168-Ceres-DawnSpacecraft-20150113-AnimationThe above animation was captured by Dawn on January 13th, 2015, and this is the best view we had of Ceres up to that date.  There are evidently impact craters.  The bright spot is easily visible in the images.  But what is it?  Is it fresh ice from a liquid ocean below?  Or is it a recent impact crater?  Either one is possible, but my guess is that it’s a fresh crater.  What’s wonderful is that we’ll know very soon.

jan25-dawn-ceresAnd looking at the most recent image from January 25th, we get an even clearer view.

What do you think that bright spot is?

4 thoughts on “The Great White Spot of Ceres”

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.