What happens when Dark Matter comes in contact with the event horizon of a large Black Hole

Josh Hill, 9, Oakdale Elementary has always talked Theory of Relativity and Astrophysics etc., I can answer most but lately he has stumped me and has been begging me to ask a pro, so here it is…. “What happens when Dark Matter comes in contact with the event horizon of a large Black Hole?” Josh … Read more

How are we sure a star is hot the whole way through?

Just an intuitive feeling that the surface of stars is extremely hot but under the surface all types of different atmospheres could exist and so the motion of energy could move through a star like xyz rivers, leaving us with a possibility of life conditions inside the star. Answer Our primary method of understanding stars … Read more

What happens to the accretion disk when two black holes merge?

I’m aware that accretion disks around black holes are formed from the swirling mass of matter that is slowly being stripped of its atoms, but what happens to it when two black holes merge? I was thinking maybe it gets eject or sucked in completely. Not sure why though. In specific, what happens to the … Read more

How long from star collapse to supernova explosion?

According to some reports, Betelgeuse might “be ready to explode into a supernova”. It’s luminosity has decreased “considerably” in the recent weeks. If we consider the “stable period” as that when luminosity is stable, what is the time between a star beginning to dim (i.e. leaving the “stable period”) and exploding as a supernova? To … Read more

Do we know exactly how fast we are going relative to the center of the galaxy

I mean total inertial on my body siting here at my computer “California US.” Ok so the earth is rotating on its axis and in turn around the sun and the sun around the galaxy. The object the question how much kinetic energy is there in a litter of water “at rest” on my desk. … Read more

What happens when astronomical bodies made up of Dark Matter collapse or collide?

Does dark matter not produce heat or radiation after a collision etc? Or, we detect radiations having no generators? Answer It appears Dark Matter (DM) does not radiate any electromagnetic radiation, hence the ‘Dark’ part of the name. It does however appear to collect together due to gravity, hence the ‘Matter’ part. It appears to … Read more

Do materials cool down in the vacuum of space?

Do materials cool down in the vacuum of space? If yes, how does it really work? Answer Heat is the thermal motion of particles. Hot object’s atoms vibrate more than cold object’s atoms. Heat is transfered by 3 main ways: Conduction: Heat flows from hot objects to cold objects. If you have an electric stove, … Read more

Why does not dark matter gather and form celestial bodies? [duplicate]

This question already has answers here: If dark matter only interacts with gravity, why doesn’t it all clump together in a single point? (6 answers) Closed 3 years ago. since the only thing we know about dark matter that it “attracts” and affect our Baryonic matter’s momentum and speed, which means that it does have … Read more