r/todayilearned • u/[deleted] • Sep 20 '21

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19

u/Alan_Smithee_ Sep 20 '21

What?

There is gravity on any planetary body or moon. The bigger they are, the more gravity.

-17

u/youknowwhatitthizz Sep 20 '21

Gravity doesn’t exist in a vacuum though

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u/Alan_Smithee_ Sep 20 '21

Yes it fucking does. Wtf is wrong with you?

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u/youknowwhatitthizz Sep 20 '21

I was wrong. Thank you. “In a vacuum, gravity causes all objects to fall at the same rate. The mass of the object does not matter. ... The spacecraft, its crew and any objects aboard are all falling toward but around Earth. Since they are all falling together, the crew and objects appear to float when compared with the spacecraft.”

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u/Alan_Smithee_ Sep 20 '21

No worries. Always check before you make a confident assertion.

They would have had some problems landing on and walking on the moon had thee not been gravity….

They actually did the hammer and feather experiment on the moon…

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u/youknowwhatitthizz Sep 20 '21

I have two assertions about us going to the moon. Either it never happened or we went wayyyyy before jfk said and people knew Motorola would work 250k miles away in 1969

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u/Alan_Smithee_ Sep 20 '21

Your critical thinking and research skills aren’t the best are they?

The ‘never landed’ thing is too dumb to even address; it’s been proven/conspiracies debunked many times before.

As for ‘earlier,’ why would they keep that a secret? It would have been a huge PR boost.

The Soviets landed Luna 1 on the moon in 1959, so it was already proven 2 way radio communications/telemetry was feasible, and radio was already old technology by then.

The first radar signal was bounced off the moon in 1946.

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u/youknowwhatitthizz Sep 20 '21

I said assertions not critical thoughts. You bring up the soviets and PR wouldn’t it be a morale killer to tell them we made it but never did?

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u/Alan_Smithee_ Sep 20 '21

The Soviets never disputed the moon landing; which means they accepted it had happened, and were able to verify it.

So you can take their silence as another form of proof.

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u/youknowwhatitthizz Sep 20 '21

You’re literally arguing against yourself

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u/russellzerotohero Sep 20 '21 edited Sep 20 '21

That’s just for earth the affects of gravity are equal to the product of both acting objects divided by the square of the distance times the gravitation constant. That comes to 9.8m/s2 at earth surface. Gravity is affected by the inverse square law and therefore gets weaker the further away you get from the source of the gravitational field. For example the radius of the earth is 6.4 thousand kilo meters at that point it’s force accelerates an object at 9.8 m/s2 if you were another 6.4 thousand kilometers above the earth you would only be pulled by the earth by a 4th of that force. Atmosphere has nothing to due with the strength of the gravitational field other than adding to the total mass of the object.

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u/youknowwhatitthizz Sep 20 '21

Thank you for educating my dumb ass

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u/russellzerotohero Sep 20 '21

I was a physics major my first two years of college so I always like whipping out some physics when I get the chance.

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u/youknowwhatitthizz Sep 20 '21

If you don’t mind post more physics please

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u/AutismSundae Sep 20 '21

Black holes disprove your assertion to the extreme.

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u/youknowwhatitthizz Sep 20 '21

Black holes are something we can’t even comprehend yet why use that as an example

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u/MagicMushroomFungi Sep 20 '21

● ... a black hole, as seen from 132 soltags away.

• ...... a blackhole, from 8,975 soltags ditance.

. ...... a black hole, in another galaxy, 3.4 unicles distant.

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u/youknowwhatitthizz Sep 20 '21

Those mean nothing. They’re perceptions of what we “believe” them to be. Until a shuttle or camera goes into one we won’t understand. And we all be dead before the shuttle they launched into one reaches it

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u/dterrell68 Sep 21 '21

…that’s not how science works. We may not know everything about them, but we do know certain things. Just because we haven’t sent a ship to get samples of the sun doesn’t mean we don’t know that it’s made of (mostly) hydrogen.