"This is a very rare event. It only happens every 400 years," said the glossy lady on ITV this morning. "Oh, dear," I said - or maybe something worse. "Text them!" said my wife. But I had to press on with the day so I hope somebody else commented.
Lunar eclipses are visible somewhere on Earth most years. Statistically that means we can see one in Britain on average once every year or two. Sometimes we'll see them in successive years and sometimes we might have to wait two or three years. In 2011 we'll be able to see lunar eclipses on 15 June and 10 December, but then we'll have to wait until 2015.
So, what's this "every 400 years" about? Well, it is apparently more than 400 years since the last time a total eclipse coincided with the winter solstice. This is a coincidence of so little import that nobody has yet bothered to work out when it will happen next but it certainly isn't a recurring event every 400 years. It is equally valid to get excited because a lunar eclipse falls on your birthday, on the birthday of Sun Myung Moon, or on a day when American Werewolf in London is being shown on TCM. But I'm not sure that poor Kate Garraway appreciated any of this and somebody glancing only briefly at that channel - like myself - could easily have come away with the impression that lunar eclipses in general were extremely rare events. I'm really not sure if this was her own impression.
I shouldn't complain; it's great to see a celestial event receiving this much attention. But it's hard not to feel uneasy at some of what gets said on these occasions, and the degree of cosmic ignorance that gets revealed.
Anyway, regardless of which day it falls on, a lunar eclipse is a beautiful and only slightly unusual sight and you won't have to wait 400 years to see the next one.
discovered I wasn't being pernickety when I learned that my 11 year old nephew - tremendously knowledgeable about astronomy - was really annoyed to have missed it because "it won't happen again for 300 years"
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