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Getting satellites into orbit is hard enough - they need to be hurled into space with enough energy to reach around 26,000km/h. But staying in orbit means avoiding losing energy to the Earth's atmospheric drag. While the official threshold of space is 100km above the Earth, the effects of the atmosphere can be detected much higher.
From just 3 m above the surface, you can see the horizon 6.2 km apart. If you are 30 m high, then you can see up to 20 km far away. This is one of the reasons why the ancient cultures, at least since the sixth century BC, knew that the Earth was curved, not flat. They just needed good eyes.
Orbital characteristics. The mean orbital velocity needed to maintain a stable low Earth orbit is about 7.8 km/s (4.8 mi/s), which translates to 28,000 km/h (17,000 mph). However, this depends on the exact altitude of the orbit.
Oct 12, 2024 · low Earth orbit (LEO), region of space where satellites orbit closest to Earth’s surface. There is no official definition of this region, but it is usually considered to be between 160 and 1,600 km (about 100 and 1,000 miles) above Earth.
Jul 27, 2021 · If you were in deep space, for example, away from any planets and away from any black holes, stars, anything that would have a lot of gravity, then you would be weightless. You would be able to float around. On the International Space Station, there is only about 90% of the gravity on Earth.
Sep 20, 2018 · Now, in a paper published on the pre-print server arXiv, three physicists, claim that the maximum gravitational field humans could survive long-term is four-and-a-half times the gravity on Earth. Or, at least you could if you are an Icelandic strongman — and Game of Thrones monster — who can walk with more than half a metric ton on your ...
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How low can you orbit around Earth without falling back to the ground?
How fast does a low Earth orbit go?
What is a low Earth orbit?
What is low Earth orbit (LEO)?
How far away can you see the horizon?
How far above Earth does a satellite orbit?
Oct 19, 2023 · In short, it’s the altitude range where the gravitational pull of the planet is high enough that the object doesn’t fly off into space, but low enough that a spacecraft doesn’t instantly fall back to Earth in the absence of consistent boosts.
