Is it possible that our sun is in a binary star system with a black hole?

As far as I understand special relativity all lengths in the universe contract to zero at lightspeed. Shouldn't the same apply to a black hole then, so that...

Can anybody explain to me why the light-barrier cannot be crossed with quantum tunneling? http://www.archania.org/members/tunneling_across_light_barrier.png

Why don't we build huge circular magnetic accelerators in space, which can be used to accelerate spacecrafts? It shouldn't be so difficult to get...

If the matrix of spacetime is accelerating inwards from everywhere on the circumference of a sphere with mass, shouldn't spacetime then disappear at the center...

http://www.archania.org/astro/gravity_from_growth.htm

If the escape velocity is greater than the speed of light within the event horizon of a black hole, shouldn't particles trapped within the event horizon be...

If all the particles in the universe ultimately end up in black holes and black holes are propelling particles back in time, then we have a complete...

Only a process of negative entropy could have brought the universe into the low entropy state it was in at the big bang. As a forward flow of time can be...

It requires energy to accelerate something, and objects are accelerating towards the center of gravitational fields, in gravitational fields. Is the object...

Is it possible that a sufficiently strong magnetic field will distort spacetime? (acting the same way as an extremely massive object)

In the standard model inflation usually refers to the period of time when space expanded at a rate that exceeded the speed of light. The usual explanation...

In my opinion the two slit experiment validates the string theory. It also provides evidence for the existence of space filling 3-branes. (for a discussion of...

I would like to state my questions in plain english, but I am more comfortable adding simple (high school) equations. A function of time can be expressed as...

These questions are strictly hypothetical. Question 1. If the earth expanded at the same rate as the universe, how much would the radius increase in 1 million...

Part 1 Mystery 1 Most small asteroids have an angular momentum (at least I am not aware of one that doesn't). The instantaneous rotation axis goes through the...

Part 2 Mystery 2 It is difficult to make a credible generalization based on a single sample, especially if that sample tends to contradict the generalization....

The fossil record shows that evolution has not progressed uniformly. From time to time short duration events caused mass extinctions. The usual explanation...

Hello everyone, I wanted to experiment with parallel programming for pcs. And I was wondering if there was a problem dealing with astronomy that I can...

Hello everybody, I am a newbie in astrophotography. I wanted to ask if somebody in this group knows about the following items: 1. if there is a cheap digital...