Black Hole
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JohnN
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I guess we've all been gasping at the photo of the black hole, 55million light years away. But what I want to know is how do we know that it's still there? It could have ceased to exist 54 million years ago!
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Primrose
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I think it's difficult to get our heads round some of these issues. I always wonder how the scientists ever manage to understand enough about it to be able to lecture on it. I smiled are John's comment that it could have ceased to exist many years ago. As I imagine, could many of the stars we currently see which are thousands of light years away.
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alan refail
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Cred air o bob deg a glywi, a thi a gei rywfaint bach o wir (hen ddihareb Gymraeg)
Believe one tenth of what you hear, and you will get some little truth (old Welsh proverb)
Believe one tenth of what you hear, and you will get some little truth (old Welsh proverb)
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oldherbaceous
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I suppose we shouldn't laugh....what the heck... 
Kind Regards, Old Herbaceous.
There's no fool like an old fool.
There's no fool like an old fool.
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Shallot Man
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Diane wrote:Good question. And if it's not there, where has it gone to. And what's on the other side?? (my head hurts just trying to imagine).
More to the point. If it is a hole. How do you know it is there.
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Westi
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Shame Steven Hawkins didn't live long enough to see his ginormous mathematical equations proved to be absolutely right. he may even have been able to answer John's question.
Westi