The Milky Way's local black hole
We talk to astronomers who study the environments around black holes, hear about what we can learn from a meteor which hit the Moon in March, and find out how spacecraft can navigate their way through the solar system.
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01:08 - How can jets issue from Black Holes if even light cannot escape?
I was wondering how Relativistic jets can be shot out from a black hole even though light which has no mass can't escape one?
Sutton - London
The Herschel Telescope has caught images of stars forming around the centre of our galaxy.
The strange case of the galaxy which flared in brightness overnight.
A gas cloud at the centre of our galaxy may soon find itself swallowed by a black hole.
30:32 - Do other planets switch magnetic poles?
As it seems that we are soon in for a magnetic polar switch, does this happen on other planets in our solar system? Does it happen to a star?
35:57 - How long do you have to accellerate at G to reach the speed of light?
Dear Dr Chris.
I have plucked up the courage to write to you with a question from a colleague of mine which I can't answer.
I have no idea why he wants to know this ( I think he reads too many science fiction comics or watches too much 'Star Treck' ) but here goes :-
British astronaut is to fly to the International Space Station in 2015.
Radio astronomers in Western Australia have resolved the mystery of a star which appear much brighter than it ought to be.
Back in March a meteor hit the Moon, and now NASA have captured images of the house-sized crater that it created.
This month the Sun produced four sizeable flares within the space of a week, suggesting that it is become more active after a quiet period.
Astronomers have found evidence for rocky material in orbit around dead stars.
57:19 - How do space-travellers navigate in our solar system?
Pre-GPS seafaring navigators used magnetic compasses and before that they
used the stars to find their way.
My question is:
How do space-travellers navigate in our solar system and how is Voyager 1
navigating in interstellar space and beyond?