Mark 16:19 So then, after the Lord had spoken to them, He was received up into heaven, and sat down at the right hand of God.
After Jesus had told the disciples that they now had the privilege of being able to go out and teach others the Gospel story, God the Father received Jesus into heaven.
Not just into heaven, but to sit on the right hand of God the Father!
Christ has made it possible that we will be able to be in heaven one day too, and he has done this because of His great love toward us. He wants us to know that we have a task to do first of all.
On completion of His task, He ascended back into heaven. When our job is done we too can be with God because Christ made that possible!