(CNN)It’s time to say goodbye to Opportunity. The Mars rover’s team made its last attempt to contact Opportunity on Tuesday night, and it went unanswered. On Wednesday, NASA confirmed that the mission is over. Solar-powered Opportunity hasn’t communicated with engineers since June 10. Dust has blocked out sunlight, and even the expected winds from November through January haven’t helped clear Opportunity’s sensors and panels. Engineers tried different things to revive Opportunity, sending repeated signals and commands to attempt to fix other potential issues. They’ve sent more than 835 recovery commands that remain unanswered.