Ocean world

Another great image on the Astronomy Picture of the Day web site, this one of Jupiter’s moon Europa, taken by the previous Galileo spacecraft mission. Evidence has continued to accumulate that under its relatively thin surface ice shell, there is a global ocean of liquid …

Read MoreOcean world

Opportunity at Santa Maria crater

There is a beautiful new panoramic photograph of Santa Maria crater taken by the Mars rover Opportunity, posted on the Astronomy Picture of the Day website (larger version there). Opportunity just passed the seven-year mark of exploring Meridiani and is still going…!