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originally posted by: SolAquarius
Retro reflectors were left on the moon and when a powerful enough laser is shined on them it reflects back both proving that space travel is real and that people have been on the moon. Myth buster did an episode on it. Of course I'm sure there will be people who say this is propaganda.
originally posted by: SpaceBalls
a reply to: Zaphod58
Let's say a plane travels across a latitude on which the spin of the Earth is equal to the plane's top speed.
The Earth is spinning and the plane on the runway spins at the same speed. The plane takes off into the opposite direction of Earth's spin.
So instead of accelerating it is actually going slower and slower, since it was already moving into the direction of Earth's spin at the same speed and now it's engines are pushing in the opposite direction, so once it is at top speed its actual velocity would be zero in a spatial frame, when it is flying at top speed on a latitude that spins with the same speed as the plane's top speed, in the opposite direction.
You could say that at this point the plane has no velocity but the Earth is moving under it. It then makes a 90 degree turn and tries to land on a North/South facing runway, but it lost that relative velocity that synched it to the Earth's spin so how does it land on this runway?
The real East to West velocity of the plane is now zero and conservation of momentum says that as long as no counterforce is applied, its velocity into that direction remains zero, and the Earth is moving sideways at let's say 600 mph. So how can it land on this North/South facing runway that is moving sideways at 600 mph and the plane's East/West velocity is now zero.
If anyone suggests it is the atmosphere keeping the plane in sync with Earth's rotation you need to do some more thinking because it is easy to demonstrate that it is not.
originally posted by: toysforadults
Not sure about flat earth but without a doubr NASA is a hoax.
originally posted by: SpaceBalls
a reply to: Zaphod58
Let's say a plane travels across a latitude on which the spin of the Earth is equal to the plane's top speed.
The Earth is spinning and the plane on the runway spins at the same speed. The plane takes off into the opposite direction of Earth's spin.
So instead of accelerating it is actually going slower and slower, since it was already moving into the direction of Earth's spin at the same speed and now it's engines are pushing in the opposite direction, so once it is at top speed its actual velocity would be zero in a spatial frame, when it is flying at top speed on a latitude that spins with the same speed as the plane's top speed, in the opposite direction.
You could say that at this point the plane has no velocity but the Earth is moving under it. It then makes a 90 degree turn and tries to land on a North/South facing runway, but it lost that relative velocity that synched it to the Earth's spin so how does it land on this runway?
The real East to West velocity of the plane is now zero and conservation of momentum says that as long as no counterforce is applied, its velocity into that direction remains zero, and the Earth is moving sideways at let's say 600 mph. So how can it land on this North/South facing runway that is moving sideways at 600 mph and the plane's East/West velocity is now zero.
If anyone suggests it is the atmosphere keeping the plane in sync with Earth's rotation you need to do some more thinking because it is easy to demonstrate that it is not.
originally posted by: rickyk90
a reply to: SolAquarius
The dome is most likely made of glass. en.m.wikipedia.org... The glass pieces they found match the bibles description in Job 37:18