What is the biggest planet in our galaxy

We won't be able to answer that until we've seen all of them and
we know that there aren't any more that we haven't seen yet.

There are estimated to be between 200 billion and 400 billion stars
in our galaxy, and a large part of the stars in the galaxy aren't visible
to us.  So you can see that it's going to take some time before we're
able to answer your question.  Check back with us next Tuesday.

Work is reduced while time is decreased

Inelastic is the answer your looking for.