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What are the chances of Halley's Comet being in the sky on the night of a lunar eclipse?
Wiki User
∙ 11y ago
Halley's comet is visible for maybe half a year every 75 years or thereabouts.
There are roughly two lunar eclipses a year.
So, completely ignoring astrophysics, the odds of Halley being visible on a night when there's a lunar eclipse are about 1/75, over all. The chances they will be visible at the same time at any given place on Earth are a bit less, since it would have to be night at the time, but if you were to pick a lunar eclipse date at random, Halley being visible the same night with a 1/200 chance doesn't seem unreasonable.
Though, to some extent, it's not very bright to speak about the "chances" of such an event, given that we know Halley's orbit pretty well (next perihelion within a few days of July 28 2061), and we know when lunar eclipses are going to be for at least the next few thousand years.
So, for the next 48 years, the chances of Halley's comet being "in the sky" (by which I assume you mean "visible to the naked eye"; it's always in the sky, where the heck else would it be?) on the night of a lunar eclipse are damn near zero.
But, in 2061, there will be two total lunar eclipses, one in April and one in September. These nicely bracket Halley's perihelion, and it's a fair bet that the odds of Halley being in the sky on the night of one or both of them are pretty good, actually.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoHalley's Comet is expected to be a lot closer to Earth the next pass (2062) than the last visit (1986). In 1986, it was on the other side of the solar system from the Earth, and was hardly visible at all. Next time, we should have a better view.
You just have to take care of yourself enough to still be around in 2062.
Wiki User
∙ 13y agoIf you were born after 1995, there is a very good chance that you will see Halley's comet when it returns in 2061 or thereabouts.
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