WebELI5: when NASA etc talk about things moving at X speed in space, what is that compared to? What's the relative point in space used and how can you know yours inert against it? This is a weird one, but it boils down to people saying you can't travel faster than light. WebOct 16, 2015 · The reason is simple: you, the plane, and everything else inside it is travelling at the same speed. In order to perceive the movement of the plane, you have to glance at the clouds outside. It's the same with …

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WebDec 7, 2024 · Time is measured differently for the twin who moved through space and the twin who stayed on Earth. The clock in motion will tick more slowly than the clocks we’re watching on Earth. If you’re ... WebOnce you are far from a planet, say, while flying between Earth and Jupiter, mid-course corrections are fairly straight-forward. To speed up, you fire a rear-facing thruster. To slow down, you fire a forward-facing thruster. To … martyn smith baringa

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WebJan 10, 2024 · From Earth’s frame of reference, if you’re accelerating at a constant rate of 1 g, then you’d reach near the speed of light in about a year, having covered about 0.5 light-years in distance. WebOct 18, 2024 · Yes. Free fall is defined as “any motion of a body where gravity is the only force acting upon it.”. In the vacuum of space, where there are no air molecules or supportive surfaces, astronauts are only acted upon by gravity. Thus, they are falling towards Earth at the acceleration of gravity. WebAug 9, 2015 · The current human speed record is shared equally by the trio of astronauts who flew Nasa’s Apollo 10 mission. On their way back from a lap around the Moon in 1969, the astronauts’ capsule hit ... martyn smith facebook