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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 ...

Dellingr: the little CubeSat that could

Zipping through the sky 250 miles up is a shoebox-sized bundle of detectors and electronics named Dellingr. The namesake of the mythological Norse god of the dawn, Dellingr is among a new breed of spacecraft known as a CubeSat. These small satellites, measured in standardized 10-by-10-by-10 cubic centimeter units, weigh no more than a few pounds—bearing little resemblance to the larger, van-sized spacecraft such as the Hubble Telescope for which NASA is known. But SmallSats—which encompass a wide range of sizes, including CubeSats—are an increasingly valuable tool in the space scientist's arsenal.

from Space Exploration News - Space News, Space Exploration, Space Science, Earth Sciences https://ift.tt/2EGEb69

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