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WHICH WAY IS UP?

METEOROLOGIST JEFF HABY

Which way is really up? Is it north, is it a direction in the vertical, is it any direction that is in the opposite direction of gravitational acceleration? Actually there is no true up. There are however, human constructed "relative" ups. It is a common perception that the North Pole points to up. But, many people in the Southern Hemisphere feel it is the South Pole that points to up. The problem is that we have a circular type universe. A uniform ball has no natural up position. Once you travel into deep space, you will lose all awareness of which direction is up. I think gravity has much to do with the feeling of up. Since gravity pulls you down, the opposite direction must be up, right? With this said, there is no true up for everyone / everywhere, just relative ups.