The Whereabouts of Jesus

Christians rightly celebrate the birth of Jesus of Nazareth the son of Mary because it was in fulfillment of God's promise to send a Deliverer, a Redeemer. And he came!
This unique Son of God, the Word taking to himself human nature offered himself as the atoning sacrifice for our sins. He died. He was buried in the cave. Three days later in that body he was raised to life. Forty days later he ascended into heaven.His departure was seen by his disciples.

Where exactly did he go? How did he get there? Why is he there? HHow long will he be there?