meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 2 years |
| seen | 2 days ago | |
| stats | profile views | 15 |
|
Aug 24 |
comment |
How fast will the sun become a red giant? This is also quite an interesting paper The search for a strategy for mankind to survive the solar Red Giant catastrophe. |
|
Aug 23 |
comment |
What would a rotating black-hole look like to a “geo-stationary” observer orbiting the black hole yes that is the question I was asking (I think). |
|
Aug 23 |
comment |
What would a rotating black-hole look like to a “geo-stationary” observer orbiting the black hole We can, at least in theory, have a black-hole where the angular velocity at a distance slightly outside the horizon is less than the speed of light. Or am I wrong? |
|
Aug 23 |
accepted | Can we model gravitation as a repulsive force? |
|
Aug 23 |
comment |
What makes us think we can actually detect gravitational waves? @Wedge: even if the space-time contains some very "solid" objects, such as neutron stars? another question: inside a distorted space, wouldn't a ruler also get distorted, and therefore, length itself. Consequently, nullifying the time difference you mention (for the 1st question) |
|
Aug 22 |
asked | What makes us think we can actually detect gravitational waves? |
|
Aug 5 |
answered | Can we model gravitation as a repulsive force? |
|
Aug 5 |
asked | Can we model gravitation as a repulsive force? |
|
Jul 29 |
comment |
What frame(s) of reference are used to measure the rotation of the Sun around the galaxy ? This may of interest Mach's principle. Related question |
|
Jul 29 |
comment |
What exactly is the definition of motion and its relation to Mach's conjecture? However if we can test the planet to be rotating, it would automatically imply an external frame of reference, which can be considered absolute. Say the radius is r and angular velocity w. That means, at any instant, a point on the equator is moving at w*r with respect to something. |
|
Jul 29 |
asked | What exactly is the definition of motion and its relation to Mach's conjecture? |
|
Jul 29 |
comment |
Is the observable region of the universe within the event horizon of a super-massive black hole? @Rory, this is an interesting question and I would not classify as trolling. |
|
Jul 29 |
comment |
Do all black holes have a singularity? I remember reading somewhere that for ordinary degenerate matter, the event horizon is inside the object, so it is not a black-hole or a singularity. I think some basic calculations could help here. For instance, a neutron star is several kms in radius, while the event horizon will be a few hundred meters. Also, it is believed that there are more degenerate states, for instance quark matter. |
|
Jul 29 |
asked | What would a rotating black-hole look like to a “geo-stationary” observer orbiting the black hole |
|
Jul 18 |
comment |
What is so special about iron? Its an irony that Iron is very stable, and yet, a little water can effectively make it into dust. |
|
Jul 18 |
comment |
Relationship between the cosmic microwave background (CMB) radiation and the visible universe great answer. So right now there is no "hard evidence" that the CMB is the signature of large scale structures in the universe? |
|
Jul 17 |
asked | Relationship between the cosmic microwave background (CMB) radiation and the visible universe |
