On a clear night the star group Cygnus (“the Swan”)
As long ago as 1838 this distance was found to be
Cygnus has now come into the news again.
Yes. A black hole may be a million times bigger and
heavier than the sun. Nothing can leave a black hole,
and disappears for ever.
We do not know much about black holes yet;
but we do know that a star has two main forces.
One force pulls things inwards towards the middle of the star,
Our sun is not a big star, and is two great forces are nicely balanced.
A black hole may have no such balance. The inward pull may
This last idea is important. Although star movements
Only a black spot in the Silver-white Milky Way.
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