What was the heaviest object ever launched into space?

Related questions

1. Which is bigger Uy scuti or VY Canis Majoris?
2. What is the biggest black hole?
3. What is smaller than a Preon?
4. What Colour is Uy scuti?
5. Does a black hole end?
6. Is Uy scuti a red giant?
7. Is the moon a star?
8. Is Uy scuti the biggest star?
9. Can you see Uy scuti?
10. Is the Galaxy bigger than the universe?

Tags

1. #shuttle
2. #currently
3. #orbit
4. #weighed
5. #space
6. #spacecraft
7. #tonnes
8. #configuration
9. #least
10. #station
11. #heaviest
12. #double
13. #international
14. #short
15. #nearly