An arrow of time, which distinguishes the past from the future and gives direction to time, is exemplified by the increase of disorder or entropy with time.” – Stephen Hawking, A Brief History of Time

What Is Time?

An arrow of time, which distinguishes the past from the future and gives direction to time, is exemplified by the increase of disorder or entropy with time.” – Stephen Hawking, A Brief History of Time

Last week we talked about the structure of space, which led us to a discussion of spacetime, the four-dimensional universe we live in. In doing so, we mentioned time but never actually discussed what time is. Time also plays an important role in the movie Interstellar, specifically the effect that gravity can have on time. So this week we will explore time.

Journal Prompt
Reflection Details:

This week you read about time dilation. What advantages and disadvantages does time dilation have on interstellar travel? Based on these advantages and disadvantages, would you want to make an interstellar voyage? Under what conditions would you be willing to make an interstellar trip?

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