Comets have been compared to "dirty snowballs"; rocks and dust held together by various types of ice. In deep space, everything cools down because the Sun is so far away, and several elements that we think of as "gasses" are frozen solid in comets.
As the comet approaches the Sun, the Sun's heat begins to melt some of the surface layers into gas, and the sunlight hitting the gas is reflected back to Earth as the "tail" of the comet. Some comets have been known to explode, as the heat of the sun melts a large ice pocket into vapor and breaks off pieces of the comet's core.
The eccentricity of Halley's comet is approximately 0.967, which is quite high compared to other solar system objects. This high eccentricity means that its orbit is very elongated, taking it from the outer solar system to the inner solar system and back every 76 years.
When it is from very far away, nothing. But when a comet approaches the inner Solar System,solar radiation causes the volatile materials within the comet to vaporize and stream out of the nucleus, carrying dust away with them. That is what we call the 'tail' of a comet.
74 yo 76 years
Yes. Halley's Comet is a comet that orbits our sun, and the definition of "Part of the solar system" is 'Any object that orbits our sun.'
Halley's comet last appeared in 1986 - it's not due back in our part of space until 2062 ! Its orbit through our solar system takes about 76 years.
Comet
Yes. Halley's Comet returns to the inner solar system about every 76 years.
A comet is in a solar system. A solar system is in a galaxy, so technically a comet is also in a galaxy.
Halley's Comet is PART OF our solar system. Halley's Comet is the best-known of the short-period comets, returning to the inner solar system every 76 years or so. It never gets much further away than the orbit of Neptune.
The eccentricity of Halley's comet is approximately 0.967, which is quite high compared to other solar system objects. This high eccentricity means that its orbit is very elongated, taking it from the outer solar system to the inner solar system and back every 76 years.
When it is from very far away, nothing. But when a comet approaches the inner Solar System,solar radiation causes the volatile materials within the comet to vaporize and stream out of the nucleus, carrying dust away with them. That is what we call the 'tail' of a comet.
Usually once every 76 years.
74 yo 76 years
What does Halley's Comet mean for the future? Nothing special; the comet will return to the inner solar system in 2061, and ought to be a pretty special view. But in the grand scheme of things, it has no special significance.
Yes. Halley's Comet is a comet that orbits our sun, and the definition of "Part of the solar system" is 'Any object that orbits our sun.'
Halley's comet last appeared in 1986 - it's not due back in our part of space until 2062 ! Its orbit through our solar system takes about 76 years.
Comet