Why do all objects in the known universe(excluding a black hole)reflect or emit some type of radiation???

Question

...tom science

Answer 1

Black holes emit Hawking radiation.

Answer 2

I think that black holes actually do emit radiation but its just pulled back in by the extreme gravitational pull of all the mass. And I think that every atom emits a minimum quanta of radiation, and thats why the objects they are made of also emit radiation

Answer 3

Not all objects in the universe radiates. But according to Hawkins black hole radiates. As some one poited out we see only radiating objects.

Answer 4

the way we observe objects demands that they radiate or reflect something that we use to observe. for instance, visible objects reflect or emit light, radio objects radiowaves, infrared objects infrared emissions, etc., etc.

far as i can understand, there may be things outside of the known universe, but the very fact that we're limited in the kinds of things we look for says that they are not known.

your use of the words 'known universe' is self-explanatory. it is known because we use something we know to find it.

if an object emits or reflects something that we haven't looked out for yet, and / or something we haven't used yet, how do we know it exists? yet?

??

Answer 5

Every object in the Universe emits radiation at all times, because charged particles in them are in constant random motion.
The point at which all motion stops, absolute zero, has never been reached.

Answer 6

To be detectable, an object has to interact with other objects. If an object exists, it has to have some properties. What is a property? Why is not it likely for something that has a property to be detectable?

Answer 7

Well, dark matter and dark energy are totally invisible.

Answer 8

They don't.
Enter dark matter.