If light-years dictate time in a sense of looking X years in the past, why is the Big Bang theory standard if we are essentially trying to discover space at the same time as our own ocean, which we know little? Does an overlap of capability not appear apparent, and if not why?

Question

If light-years dictate time in a sense of looking X years in the past, why is the Big Bang theory standard if we are essentially trying to discover space at the same time as our own ocean, which we know little? Does an overlap of capability not appear apparent, and if not why?

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Answer 1

You can step out onto the observation deck of the Empire State building 1250 feet above the street and you’ll be fine. You can easily breathe the air. You won’t explode or be crushed by pressure or lack thereof. If you did that in the ocean you’d be crushed flat.

Space is easy compared to the ocean environment. Any airplane will get you a mile in the air. A military sub Sea Wolf class has an operational depth of only 787 feet, and a crush depth of less than 2,000 feet. It has another 0.7 miles deeper to go to get to a mile. The ocean basin is about 3.7 miles down.