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## Re: [M & B] Re: Question for Pi

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• From: Ray Ausban Thank you for the trouble. Pi: You re more than welcome. Ray: So, if the sun s mass is compacted in a smaller space, then the gravity force
Message 1 of 10 , Mar 8, 2013
From: Ray Ausban
Thank you for the trouble.

Pi:
You're more than welcome.

Ray:
So, if the sun's mass is compacted in a smaller space, then the gravity force increases.

Pi:
The gravity at the surface of the sun will increase because the surface is closer to the center of mass.  At the same distance, you would encounter the same gravity.

• Pi, I m asking this question because of something I remember in elementary school. I lived in Huntsville, AL which was one of NASA s hubs and there was always
Message 2 of 10 , Mar 11, 2013
Pi,
I'm asking this question because of something I remember in elementary school. I lived in Huntsville, AL which was one of NASA's hubs and there was always lots of 'space talk' going on back then.

Several discussions talked about the gravity on Jupiter being massively huge, that if you were to be on Jupiter, you couldn't stand up and your own weight would crush your rib cage if you were laying down. In short, you would just die.

So, my question is this: do you know when the gravity formula you gave me was perfected? Has there been any modification to it since the 'space age' began?

Thanks, Ray

From: "PIASAN@..." <PIASAN@...>
To: Maury_and_Baty@yahoogroups.com
Sent: Friday, March 8, 2013 7:13 AM
Subject: Re: [M & B] Re: Question for Pi
From: Ray Ausban
Thank you for the trouble.

Pi:
You're more than welcome.

Ray:
So, if the sun's mass is compacted in a smaller space, then the gravity force increases.

Pi:
The gravity at the surface of the sun will increase because the surface is closer to the center of mass.  At the same distance, you would encounter the same gravity.

• From: Ray I m asking this question because of something I remember in elementary school. I lived in Huntsville, AL which was one of NASA s hubs and there was
Message 3 of 10 , Mar 11, 2013
From: Ray
I'm asking this question because of something I remember in elementary school. I lived in Huntsville, AL which was one of NASA's hubs and there was always lots of 'space talk' going on back then.

Several discussions talked about the gravity on Jupiter being massively huge, that if you were to be on Jupiter, you couldn't stand up and your own weight would crush your rib cage if you were laying down. In short, you would just die.

Pi:
I'm not sure where that may have come from.  The accepted value is around 2.4 or so times Earth's gravity.... even at NASA.
"Someone who weighs 100 pounds on Earth would weigh about 240 pounds on Jupiter."

Since Jupiter is a gas giant, it really has no surface as such.  Perhaps the ones you heard were thinking of the gravity if Jupiter were the size of Earth.

Ray:
So, my question is this: do you know when the gravity formula you gave me was perfected?

Pi:
1687.

Ray:
Has there been any modification to it since the 'space age' began?

Pi:
Einstein might have .... but for practical purposes, the results are the same.  Newton was pretty good.

• Thank again! ________________________________ From: PIASAN@aol.com To: Maury_and_Baty@yahoogroups.com Sent: Monday, March 11, 2013 7:33 PM
Message 4 of 10 , Mar 12, 2013
Thank again!

From: "PIASAN@..." <PIASAN@...>
To: Maury_and_Baty@yahoogroups.com
Sent: Monday, March 11, 2013 7:33 PM
Subject: Re: [M & B] Re: One more question for Pi
From: Ray
I'm asking this question because of something I remember in elementary school. I lived in Huntsville, AL which was one of NASA's hubs and there was always lots of 'space talk' going on back then.

Several discussions talked about the gravity on Jupiter being massively huge, that if you were to be on Jupiter, you couldn't stand up and your own weight would crush your rib cage if you were laying down. In short, you would just die.

Pi:
I'm not sure where that may have come from.  The accepted value is around 2.4 or so times Earth's gravity.... even at NASA.
"Someone who weighs 100 pounds on Earth would weigh about 240 pounds on Jupiter."
Source:  http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-jupiter-k4.html

Since Jupiter is a gas giant, it really has no surface as such.  Perhaps the ones you heard were thinking of the gravity if Jupiter were the size of Earth.

Ray:
So, my question is this: do you know when the gravity formula you gave me was perfected?

Pi:
1687.

Ray:
Has there been any modification to it since the 'space age' began?

Pi:
Einstein might have .... but for practical purposes, the results are the same.  Newton was pretty good.
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