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Hidden black hole caught flinging star back and forth in distant cluster

From the article:

Globular clusters are ancient — nearly 10 billion years old (our universe is thought to be about 13.8 billion years old). They contain tens of thousands or even millions of stars in a tight sphere. Our own galaxy is home to more than 150, though some galaxies can contain thousands of these clusters.
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Bad reporting there. While globular clusters can have stars as little as in the millions...our galaxy has far more than 150 million which is what this section of the article essentially says. Our galaxy have numbers in the billions. How many for sure isn't known as 1: We can't easily count how many stars are in our galaxy due to various reasons such as distance vs size vs dust hiding stars and a myriad other things. 2: We can't directly observe our galaxy. We only have a side edge view. However it is estimated that there are at least 100 billion stars at the very low end. High end is around 400 billion.

Sorry, when it comes to astronomy I hate inaccurate reporting.
 
Kal'Stang said:
From the article:



Bad reporting there. While globular clusters can have stars as little as in the millions...our galaxy has far more than 150 million which is what this section of the article essentially says. Our galaxy have numbers in the billions. How many for sure isn't known as 1: We can't easily count how many stars are in our galaxy due to various reasons such as distance vs size vs dust hiding stars and a myriad other things. 2: We can't directly observe our galaxy. We only have a side edge view. However it is estimated that there are at least 100 billion stars at the very low end. High end is around 400 billion.

Sorry, when it comes to astronomy I hate inaccurate reporting.
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I believe the article is referring to how many star clusters are in our galaxy, about 150 (one hundred and fifty star clusters), not how many stars there are.

Globular clusters are ancient — nearly 10 billion years old (our universe is thought to be about 13.8 billion years old). They contain tens of thousands or even millions of stars in a tight sphere. Our own galaxy is home to more than 150, though some galaxies can contain thousands of these clusters.
Click to expand...
 
rjay said:
I believe the article is referring to how many star clusters are in our galaxy, about 150 (one hundred and fifty star clusters), not how many stars there are.
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:3oops: I think you're right. :3oops: Think i'll just shut up now......
 
jet57 said:
Very interesting; thanks.

Black holes just seem to defy reality as we know it. Have you read Hawkings?
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Where's the proof that black holes exist?
 
American said:
Where's the proof that black holes exist?
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One method is gravitational lensing. Another method is measuring the extreme velocity of stars orbiting the black hole (Sagittarius A*) at the center of our own galaxy.

Virtually every spiral galaxy has a black hole located at its rotational center. Another method is to observe a slave star losing material to a black hole in a binary orbital system.

There are various other methods also.
 
Rogue Valley said:
One method is gravitational lensing. Another method is measuring the extreme velocity of stars orbiting the black hole (Sagittarius A*) at the center of our own galaxy.

Virtually every spiral galaxy has a black hole located at its rotational center. Another method is to observe a slave star losing material to a black hole in a binary orbital system.

There are various other methods also.
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Apparently the world's smartest man doesn't think black holes exist. Who says that our theoretical methods about how to find them even work?
 
American said:
Apparently the world's smartest man doesn't think black holes exist. Who says that our theoretical methods about how to find them even work?
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And the world's smartest man would be?
 
American said:
Where's the proof that black holes exist?
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The speed at which stars orbit items. We can observe the effects of gravity by their orbits.
 
RAMOSS said:
The speed at which stars orbit items. We can observe the effects of gravity by their orbits.
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I'll withhold judgment, but I'm skeptical.
 
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