*** The Official Astronomy & Universe Thread ***

I have some very basic/stupid questions about Rosetta that I’m hoping someone can help me answer:

Rosetta’s orbit of the comet is triangular, is this not requiring the use of loads of fuel in order to carry out?

Am I right in thinking that the comet does have some gravitational pull which allows Rosetta to orbit it?

If there’s no atmosphere on the comet, how is the probe going to ‘stick’ to it? I don’t really understand how you can land on something like this. Is there gravity on it?

I know these are probably very stupid but I just don’t understand it. Thanks
 
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