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What are the names of some comets?
Meteors don't have names; they are transient, burning up in the atmosphere. They are gone in a second or two. If it survives, some meteorites are given names, usually related to the location of the fall.
When was the last time Halley's comet passed?
== == Its last appearance was in 1986, and it is due back in 2061. I had the pleasure of seeing it in 1986; it wasn't an extremely dramatic show that time around, but beautiful nonetheless. See link for more information.
The amount of time it takes for a comet to complete its orbit?
33 years.
What caused Halleys comet tail?
We don't know. I've read estimates that Halley's Comet is probably large enough to survive another ten million years or so.The problem, of course, is that a comet is like a "dirty snowball" in composition. Rocks and dust, loosely bound together by ice. While out in the depths of space, the snowball is perfectly stable. But when the comet approaches the Sun, the ice begins to vaporize and the vapor carries away some of the dust. This forms the tail of the comet.With each approach, the comet becomes smaller and less stable. Some comets experience explosions, when a pocket of vaporized ice is trapped and then bursts carrying chunks of rock and dust away. We cannot predict when that will happen to Halley's Comet, but we know that someday, it WILL.And comets do occasionally collide with things; things like Earth, or Mars, or Jupiter, or asteroids. A lot could happen.
What years has Halley's comet appeared?
Halley's comet was last seen in the year 1986. It is seen after every 75 to 76 years, having a relatively stable period affected by Jupiter and Saturn. It can be observed for three or four months before, and several months after its closest approach to the Sun. It will next be visible to the naked eye in July 2061.
What are the names of some comets?
Meteors don't have names; they are transient, burning up in the atmosphere. They are gone in a second or two. If it survives, some meteorites are given names, usually related to the location of the fall.
What are the facts about Halley's comet?
Halley's comet is a short period comet, which passes earth every 75-76 years. It last passed by in 1986, and will next pass by in 2061. It is a short period comet - the only one which is visible with the naked eye. There are other comets as spectacular or more so, but these pass by a lot less frequently. It has been known of since ancient times, maybe from around 466 BC. It has been considered a bit of an omen through history, it was seen in 1066, shortly before the battle of Hastings where Harold II of England was defeated and lost his life. Halley's comet is composed of a mixture of volatile ices such as water, carbon dioxide and ammonia. A large proportion is also made up of dust.
When was the last time Halley's comet passed?
== == Its last appearance was in 1986, and it is due back in 2061. I had the pleasure of seeing it in 1986; it wasn't an extremely dramatic show that time around, but beautiful nonetheless. See link for more information.
How long does Halley's comet go by seconds?
It is difficult to pin down a comet's orbit all that precisely; we have a difficult enough time predicting the MONTH, much less the second. There are many small and unseen objects in the outer solar system that can perturb the orbit of a comet and cause it to be either early or late returning to the Sun. Halley's Comet has a period of about 76 years, and should be visible in 2061. But there is a (very tiny) chance that it will hit something in the darkness of space far beyond Pluto and never be seen again. Who knows? Perhaps by that time, we'll be able to catch it and put it in the Smithsonian.
The amount of time it takes for a comet to complete its orbit?
33 years.
What is group velocity in waveguide?
Group velocity in a waveguide is speed at which EM energy travels in the guide.It will always be less then speed light.
Explain why refractive index values of liquids are greater than one?
The velocity of light in a liquid sample is always less than the light in air The velocity of light in a liquid sample is always less than the light in air
What are the chances of Halley's Comet being in the sky on the night of a lunar eclipse?
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.
Are comets lighter than moon?
Do you mean lighter in color? Halley's comet has an albedo of about 0.04, which is the color of tar. Our Moon has an albedo of about 0.07, which is the color of weathered asphalt. If you mean lighter as in less massive... we've never seen a comet as massive as our Moon, but there are some pretty tiny moons out there in the outer solar system; a few comets might be larger than some of them.
What caused Halleys comet tail?
We don't know. I've read estimates that Halley's Comet is probably large enough to survive another ten million years or so.The problem, of course, is that a comet is like a "dirty snowball" in composition. Rocks and dust, loosely bound together by ice. While out in the depths of space, the snowball is perfectly stable. But when the comet approaches the Sun, the ice begins to vaporize and the vapor carries away some of the dust. This forms the tail of the comet.With each approach, the comet becomes smaller and less stable. Some comets experience explosions, when a pocket of vaporized ice is trapped and then bursts carrying chunks of rock and dust away. We cannot predict when that will happen to Halley's Comet, but we know that someday, it WILL.And comets do occasionally collide with things; things like Earth, or Mars, or Jupiter, or asteroids. A lot could happen.
What years has Halley's comet appeared?
Halley's comet was last seen in the year 1986. It is seen after every 75 to 76 years, having a relatively stable period affected by Jupiter and Saturn. It can be observed for three or four months before, and several months after its closest approach to the Sun. It will next be visible to the naked eye in July 2061.
What size is the nucleus of a comet?
Any size is possible, though most of them are "small", at least compared to things like planets. Halley's Comet, for example, is about 15x8x8 km, which is quite large on a human scale ... most mountains aren't that big ... but still small compared to Earth itself or even the Moon.
