For Your Astronomers: BBC News - Comet Siding Spring Set To Whizz Close To Mars

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Link: BBC News - Comet Siding Spring set to whizz close to Mars

 

...Fast-moving dust ejected from the comet poses a small but tangible risk to the probes.

 

The space agencies of America, Europe and India have therefore shifted the satellites so that they will be on the far side of the planet when moving past Siding Spring's debris field.

 

This is likely to occur about 90 minutes after the comet has made its closest approach to Mars at 18:27 GMT...