Oto Posted January 30, 2018 Share Posted January 30, 2018 I have a Celestron 127EQ PowerSeeker Telescope and was wondering if a moon filter is required to prevent any damage to the eyes for the coming super blue blood moon. Or are the filters purely optional when it comes to anything moon related? Thank you Link to comment Share on other sites More sharing options...
Ruud Posted January 30, 2018 Share Posted January 30, 2018 No, the Moon is completely safe without a filter. Use one only if you find it uncomfortable without. Link to comment Share on other sites More sharing options...
mcrowle Posted January 30, 2018 Share Posted January 30, 2018 Hi Oto, You won't damage your eyes looking at the Moon without a filter, but it will make it more comfortable to view (especially at low magnification). Regards, Mike. Link to comment Share on other sites More sharing options...
xtreemchaos Posted January 30, 2018 Share Posted January 30, 2018 your in no danger, the only thing you have to be carefull with is the sun. charl. Link to comment Share on other sites More sharing options...
mcrowle Posted January 30, 2018 Share Posted January 30, 2018 Ah, posted at the some moment, Ruud Link to comment Share on other sites More sharing options...
Ruud Posted January 30, 2018 Share Posted January 30, 2018 1 minute ago, mcrowle said: Ah, posted at the some moment, Ruud This forum is too fast! Link to comment Share on other sites More sharing options...
LukeSkywatcher Posted January 31, 2018 Share Posted January 31, 2018 No worries about damage to your eyes when observing the Moon without a filter. It is only reflected Sun light and only 10% of the Suns total output. It also has none of the harmful UV (ultra violet) light that the Sub has. When the Moon is full, its very bright and can be uncomfortable to view. If you do view it without a filter and then quickly want to move on and look at something else, you will have to give your eye a few minutes to become dark adapted again. NEVER,never ever view the Sun without proper safety filters. You WILL damage your eyes. Now, if you will excuse me..........im off to google just what a super blue blood Moon is. OK, that didnt take long. It was the blue bit i didnt understand. Link to comment Share on other sites More sharing options...
Ruud Posted January 31, 2018 Share Posted January 31, 2018 Actually, Paul, the albedo of the Moon is around 10%, which makes it as grey as asphalt, but its brightness is much less than 10% of that of the Sun. The magnitude of the Sun is -26.7 and that of the full Moon is -12.7. That's a difference of 14 magnitudes. This makes the ratio of the brightness of the Sun to that of the Moon 10^(0.4*14) = 400,000 times approximately. So the full Moon has a brightness that is 0.00025% of that of the Sun. Link to comment Share on other sites More sharing options...
LukeSkywatcher Posted January 31, 2018 Share Posted January 31, 2018 11 minutes ago, Ruud said: Actually, Paul, the albedo of the Moon is around 10%, which makes it as grey as asphalt, but its brightness is much less than 10% of that of the Sun. The magnitude of the Sun is -26.7 and that of the full Moon is -12.7. That's a difference of 14 magnitudes. This makes the ratio of the brightness of the Sun to that of the Moon 10^(0.4*14) = 400,000 times approximately. So the full Moon has a brightness that is 0.00025% of that of the Sun. I know the Moon grey. I didnt know that the reflected Sun light was only 0.00025%. Ive read online many times it was 10%.I never questioned it. Link to comment Share on other sites More sharing options...
VNA Posted January 31, 2018 Share Posted January 31, 2018 No it should not be a problem to see the eclipse without filters, but you have to be at the right place to see todays eclipse! It is not very comfortable particularly when it is full, a filter helps to make it more bearable. Link to comment Share on other sites More sharing options...
LukeSkywatcher Posted January 31, 2018 Share Posted January 31, 2018 I'm guessing the Lunar eclipse is visible in the U.S. and not in the UK or Ireland simply because not many people in UK/Ireland refer to the Moon as being a Super,Blue,Blood,Harvest Moon etc. We most likely just call it a Lunar eclipse. Link to comment Share on other sites More sharing options...
Skinnypuppy71 Posted February 1, 2018 Share Posted February 1, 2018 Well...I viewed that super blue,blood moon tonight...wow..what a sight...but it nearly blinded me..it was that bright....I think a filter might have been required . lol Link to comment Share on other sites More sharing options...
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