[LMB] Arecibo

Howard Brazee howard at brazee.net
Mon Nov 23 22:40:51 GMT 2020



> On Nov 23, 2020, at 2:28 PM, Markus Baur via Lois-Bujold <lois-bujold at lists.herald.co.uk> wrote:
> 
>> The far side of the moon is much better protected from Earth based radiations.   And the very slow rotation period of the moon makes it much, much easier to have super long exposures.
> 
> the slow rotation speed is both and advantage(as above) and a curse, as it will take about 14 days (or longer, depending on how much the telescope can steer away from zenith) until a target can be observed again

There are lots of options for looking at a target that one observer can’t see.   (Which is nice when two big radar observatories are in opposite sides of the Earth), but not a lot of options to take 20 hour exposure photos.


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