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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 ...

Milky Way and supermassive black hole

The Milky Way galaxy is believed to contain a single supermassive black hole at its center, besides a few hundred thousand stellar black holes; known as Sagittarius A* (pronounced "Sagittarius A-star"). This black hole has a mass estimated to be about 4.1 million times that of our Sun. 

While there may be numerous smaller black holes scattered throughout the Milky Way, astronomical evidence points to Sagittarius A* as the prominent supermassive black hole in our galaxy. Researchers continue to study the galaxy to uncover more about black holes, but as of now, the consensus is that the Milky Way hosts one supermassive black hole.

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