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Mars and Earth - Small difference & big consequences

Einstein's theory of relativity suggests that time is not a constant and can vary based on gravitational fields and speed. In a strong gravitational field, time moves slower compared to a weaker one. Since Mars has a weaker gravitational field than Earth, time actually flows slightly faster there.  This concept has implications for future space missions, as the timing of communication and operation of spacecraft will need to account for this difference in how time elapses on Mars compared to Earth. Missions may need to adjust their schedules, operations, and technology to ensure accuracy and synchronization with Earth. Basically, the moment you bring gravity and velocity into the picture, time stops behaving like the simple, universal tick‑tock we experience in everyday life. And you’re absolutely right: Mars’ weaker gravity means clocks there run a little faster than clocks on Earth. What’s fascinating is how small the difference is—and how big the consequences become ...

Do we really want a nationalistic future in space?

The annals of science fiction are full of visions of the future. Some are techno-utopian like "Star Trek" in which humanity has joined together in peace to explore the cosmos. Others are dystopian, like the World State in "Brave New World." But many of these stories share one thing in common – they envision a time in which humanity has moved past narrow ideas of tribe and nationalism. That assumption might be wrong.

from Space Exploration News - Space News, Space Exploration, Space Science, Earth Sciences http://bit.ly/2VHXel9

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