the space shuttle
It is an adjective because if you said It was the heaviest object. The word heaviest is describing the noun: object.
The skin is the heaviest and biggest organ
The liver is the most heaviest organ in the human body; It is also the largest internal organ.
The heaviest internal organ in the human body is the liver, averaging about 3.5 pounds in an adult.
The largest and heaviest internal organ is the liver.
As the heaviest object are kilometer by kilometre sized icebergs all you now have to do is calculate how heavy they are.According to Stephen Hawking even black holes evaporate.
brain
The liver is the heaviest internal organ in the human body, weighing about 3 pounds on average.
The heaviest weight ever lifted by a human being is 6,270 pounds, achieved by Paul Anderson in 1957.
Judge by the distance it has moved in relation to another object.
An object that is moved by physical exertion is one definition
I have to say in American History, The statue of Liberty! The heaviest and tallest man made mobile object so far is the Troll A platform.