...Beauty, cleaning, DIY tips and more - free to join!
   Login   Contact us   Site map   Puzzle Club   Ask a question    Newsletter

How does gravity work?

I would love to know how gravity works on planets, and how moons revolve around other planets.
Question asked by: cman1146

Asked on: 30 Sep 2009

This is an interesting question.

According to Einstein and relativity, which transformed our understanding of the universe, it is all to do with spacetime itself.

Gravity is a reflection of the shape of space, so for instance a body that has a high mass literally affects the shape of space around it.

The classic demonstration in two dimensions is to imagine a rubber sheet, with a big heavy ballbearing placed in the middle. This depresses the rubber (representing space) and then if you roll a small ballbearing around the outside it will fall into the big one, representing gravitational pull.

By: knowitall
Replied at: 11 Oct 2009
Rate Answer
Comment or provide your answer to this question
No comments have been added to this question "How does gravity work?".
Ask a New Question

Find out more about Astronomy

Astronomy Questions and Answers

universe Questions and Answers

Next question: Which of these evolutionary paths is the fate of our sun?


Become a Member! It's Free >>>

Share on Facebook: On Twitter: TwitterTweet this!

Question Keywords

gravity  

More Questions:

What Is The Copernican Model Of The Universe?
How Do We Find Out About The History Of Earth?
The Brightest Stars In A Young Open Cluster Will Be/
What Does The Word Apogee Mean?
What Is A Planet?