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)
Continuity mistake: At about the 30-minute mark, right after Judy and Maureen have a heart about being the perfect daughter, Maureen says "you have to get out of here." When she says this, she slips out of her harness and her shoulders come loose, which is the only reason the two can't leave the ship easily. The next shot we see of Maureen she is back in her harness. (00:30:10)
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.