The New Guy - S3-E3
Visible crew/equipment: After Penny asks everyone on the ship to double-check that everything is tied down, when Will tells Robot that he thinks he found something to help them later, there's a yellow T-mark taped to the floor which is visible at the bottom of the screen. (00:31:20)
Answer: Yes to all questions. The best theoretical estimate is that the universe is about 7 trillion light years across. That is about 250 times larger than the currently observable universe. So, yes, using trillions of light years as a unit of measure is appropriate. And, yes, the age of the universe is a measure of time, and the space between galaxies is a measure of distance.