Blackholes2 Forum Message | |
| Forums: |
Atm ·
Astrophotography ·
Blackholes ·
Blackholes2 ·
CCD ·
Celestron ·
Domes ·
Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem |
|
|
|
|
||||
|
|
||||||
Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place... The Space and Astronomy Agora |
| Re: What Causes Gravity?
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Zephram Cochrane/">Zephram Cochrane on November 14, 1999 05:58:08 UTC |
: What exactly causes objects to stay on the planet? Gravitation(or the metric tensor) is the geometry of space-time. Unless acted on by forces things will follow geodesic consistent with that geometry. It is the normal force on the object by the surface of the planet keep the object up on the planet, instead of falling to the core. :Is it the rotation of the planet? If so, how fast would a singularity be rotating to create a black hole? The rotation actually leads to a repulsion term in the acceleration rather than attraction. |
|
| Additional Information |
|---|
 |
| About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy |
|
Unless otherwise specified, web site content Copyright 1994-2024 John Huggins All Rights Reserved Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" are trademarks of John Huggins |