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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 ...

About White Dwarf Atmospheres

White Dwarf Atmospheres Might Contain the Pulverized Crusts of Their Dead Planets

Archeologists study ancient civilizations through evidence left behind and buried in layers in long-lost sites. And now, astronomers have developed a technique to learn more about the planets that once orbited a star. By studying the atmosphere of a long-dead star called a white dwarf, astronomers can detect the chemicals in its atmosphere that indicate what kinds of planets once orbited there. Of course, those planets are long gone, now just pulverized debris incorporated into the star, but it's a good start.

Read the full story by Paul M. Sutter

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