Answer:
What can be heard and caught but never seen?
Craig died in Florida. Shortly after, Tracy died at sea. Nobody mourned, In fact, everyone was absolutely delighted. Why?
He has one and a person has two. A citizen has three. And a human being has four. A personality has five. And an inhabitant of earth has six.
I'm a god. I'm a planet. I measure heat.
Until I am measured I am not known, Yet how you miss me when I have flown.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.