Sunday 28 August 2022

Defying Gravity

Gravity, it is said, is pretty weak. Pick something up off the floor, there you go, you have defied a whole planets worth of gravity but what Gravity has got is that it is constant so put down whatever it was you picked up and jump. You coming back down and failing to hit the ceiling is you NOT defying the Planets worth of Gravity.
With the Artemis rocket due to launch tomorrow morning (8.30am BST), to escape the pull of the Earth if it will burn through six tonnes of fuel per second provided by the two solid rocket booster rockets and then two million litres of liquid hydrogen and 740,000 litres of liquid oxygen before the upper stage rockets fire the Orion capsule into orbit and then the Interim Cryogenic Propulsion Stage Rocket kicks in which will propel it around the Earth and then hopefully onto the Moon.
Many people say 'escape the earth's Gravity' but that isn't actually true, the Earths Gravity extends far out into Space, the International Space Station is is in Low Earth Orbit 248 miles above the Earth but even at that height it is still subjected to 88% of the Gravity down here on the surface, what it is actually doing is falling around the Earth but travelling at such a speed (17,500 mph) that it matches the Earth curving
away from it.
Imagine shooting a cannon ball which will fly along until friction slows it down enough and gravity pulls it towards the Earth and it drops down and hits the ground.
Imagine now using more gunpowder and shooting the ball even faster so it travels further until friction and gravity drag it down to the ground.
So the faster you shoot the cannon ball, the further it goes so now imagine if you could shoot a cannon ball out of the cannon at such a speed that as the ball fell to Earth, the earth curved away so the ball would be falling but the Earth would be curving away at the same rate that the ball was dropping.
With no friction to slow it down in space, the ball would continually be falling and the Earth curving away so the ball would never actually be able to fall to the ground and so it said to be in orbit around the Earth.
So, when you are in orbit, you are in free fall but going so fast that you won't actually fall to the ground which is continually moving away from you at the same speed that you are falling and even more amazing than the science and maths behind our knowledge of all this is who we have to thank for it so Danke Adolf Hitler, without your rocket development program and V2 rocket, at 8.30 tomorrow morning i would be watching Good Morning Britain and not the next step towards the latest Moon Landings.

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