Naked Science Forum

On the Lighter Side => That CAN'T be true! => Topic started by: noel eastwod on 05/06/2009 08:30:02

Title: Has Earth's gravity changed recently?
Post by: noel eastwod on 05/06/2009 08:30:02

noel eastwod asked the Naked Scientists:
   
Is it possible that gravity has changed?

If we were once the same as the moon is now wouldn't this answer a few questions ?

(1) Dinosours could have easly been able to hold up there bulk
(2) the pyramids bricks would have felt as heavy as polystyrene... is our way of measuring gravity not accurate because what we measure with  with also getting heavier?

Please help me with this as is is driving me crazy..

thanks, noel

What do you think?

Title: Has Earth's gravity changed recently?
Post by: Daerana on 05/06/2009 13:06:50

For the gravity to increase wouldn't that mean that the Earth's mass has also increased?

Title: Has Earth's gravity changed recently?
Post by: Chemistry4me on 06/06/2009 00:16:51

Since I haven't gained any weight recently that must be a no. [:)]

Title: Has Earth's gravity changed recently?
Post by: Daerana on 06/06/2009 00:17:30

Quote from: Chemistry4me on 06/06/2009 00:16:51

Since I haven't gained any weight recently that must be a no. [:)]

nor me [:)]

Title: Has Earth's gravity changed recently?
Post by: Daerana on 06/06/2009 00:18:27

And I did mean a little more of an increse than a few kilos C4M.  [;D]

Title: Has Earth's gravity changed recently?
Post by: Chemistry4me on 06/06/2009 00:19:56

Huh?

Title: Has Earth's gravity changed recently?
Post by: Daerana on 06/06/2009 00:20:28

Quote from: Chemistry4me on 06/06/2009 00:19:56

Huh?

What?

Title: Has Earth's gravity changed recently?
Post by: Chemistry4me on 06/06/2009 00:21:31

Quote from: Shadow on 06/06/2009 00:18:27

And I did mean a little more of an increse than a few kilos C4M.  [;D]

What did you mean by this sentence?

Title: Has Earth's gravity changed recently?
Post by: Daerana on 06/06/2009 00:23:07

You said that you havn't gained any weight so it must be a no.  I said that the amount of wieght would have to be a bit more than what one person could put on.

Title: Has Earth's gravity changed recently?
Post by: Chemistry4me on 06/06/2009 00:25:03

If gravity has increased, I would get heavier, which I haven't.

Title: Has Earth's gravity changed recently?
Post by: Daerana on 06/06/2009 00:32:36

Oh, that's what you meant.  I thought that you were saying that you havn't put on weight, therefore making the mass of the Earth increase (which wouldn't work anyway because the weight you had put on would have come from somewhere else on the Earth, maaking no overall difference).

Title: Has Earth's gravity changed recently?
Post by: Bored chemist on 06/06/2009 17:02:58

If gravity had changed it would have affected the Moons orbit etc. Since the ancient astronomers kept quite good records of the moon etc. we know that gravity hasn't changed.

Title: Has Earth's gravity changed recently?
Post by: Yomi on 07/06/2009 20:22:39

Its stagnated from the begining

Title: Has Earth's gravity changed recently?
Post by: Bored chemist on 08/06/2009 18:55:13

Was that actually meant to mean anything?

Title: Has Earth's gravity changed recently?
Post by: BigLuca on 19/07/2009 23:19:17

Sorry to Lazarus a thread, but I had to respond to this one.  An expanding Earth is actually championed by these guys http://www.expanding-earth.org/ (http://www.expanding-earth.org/).  It's all pseudoscience obviously, but if you like science fiction it is a good read.

If I ever become a millionaire I want to fund a debate between those guys and these guys http://www.theflatearthsociety.org/forum/ (http://www.theflatearthsociety.org/forum/).  I would be like watching an extra 21st chromosome slap fight!

Title: Has Earth's gravity changed recently?
Post by: tangoblue on 28/07/2009 16:35:14

Quote from: Bored chemist on 06/06/2009 17:02:58

If gravity had changed it would have affected the Moons orbit etc. Since the ancient astronomers kept quite good records of the moon etc. we know that gravity hasn't changed.

Well I don't know how to break this to you but... the moons orbit has changed.

Title: Has Earth's gravity changed recently?
Post by: Chemistry4me on 29/07/2009 05:10:00

Yes, it's moving further away.

http://curious.astro.cornell.edu/question.php?number=124

But I think Bored chemist already knew that.

Title: Has Earth's gravity changed recently?
Post by: scalyblue on 30/08/2009 08:23:51

if the gravitational constant of the universe ( Earth is in the universe, after all ) were to change, the results would be catastrophic.  I'm not going to get into it, you're smart enough to do your own research

http://www.smbc-comics.com/?id=807