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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 ...

To the moon and back: Apollo 8 and the future of lunar exploration

Apollo 8 was supposed to be a test flight, meant to simulate atmospheric re-entry from the moon but never meant to go there. Hurtling toward Earth at 2,407.5 miles per hour is hairy business and NASA, having never done so before, needed practice. But then the USSR successfully launched two of its own moonshots (unmanned Zond 5 and 6) on the heels of President Kennedy's call for men on the moon by the end of the '60s. It felt to most like a matter of time before America lost its space race for good.

from Space Exploration News - Space News, Space Exploration, Space Science, Earth Sciences https://ift.tt/2Gsdpzr

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