Black Holes & Stars - What Do We Know?

[bhpv]

Hi,

One can register waves of light.
Is there anything known different then stars where we receive information from?
Say black holes?

I really guess.

 

[DennisN]

Hi bhpv,
I think I can help you, but I really don't understand the question. Can you rephrase it? And be more specific?

 

[phinds]

Yes, I agree w/ Dennis --- your question is incoherent

 

[bhpv]

Hi,
Ok. Sorry for that.
I do not understand what one can experience from black holes here on earth.

 

[mrspeedybob]

Black holes are not directly detectable. We detect them by their effects on surrounding matter. For example, if you see a star orbiting around something, but you can't see the thing it is orbiting, then the thing is probably a black hole.

 

[DennisN]

Is there anything known different then stars where we receive information from?

First, I'd like to explain that I didn't understand that question because there are different answers to it but the general answer to that question is : yes!

• The Earth gets bombarded with massive particles from space (which isn't light) - see "cosmic rays".
  
• The cosmic background radiation does not come from stars.
  
• We can detect other objects, e.g. extrasolar planets, by looking at how their stars get affected by their planet(s).

I do not understand what one can experience from black holes here on earth.

This question I understand . Black holes are very hard to detect, but there are good reasons for believing that they exist; as an example, astronomers have seen stars orbiting what appears as a very large "dark" mass centre in the centre of the Milky Way.

I sincerely recommend this clip:
ESOcast 2: Unprecedented 16-year long study tracks stars orbiting Milky Way black hole

 

[NascentOxygen]

Is there anything known different then stars where we receive information from?
Say black holes?

Try a google search on "gravitational lensing black hole".