Astronomy
Constellations

Why are some constellations not visible through out the year?

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2012-08-30 20:52:18
2012-08-30 20:52:18

It depends on your location and the time of year as to what constellations are or are not visible.

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It depends entirely on what latitude you are observing from. Some stars and constellations are always visible, some are never visible and some for only part of the year


Because we tend to do our stargazing at roughly the same time of night whenever we go out, but the constellations move through our clock.-- Constellations within (your latitude) of the celestial pole are visible at any time on any clear night, all year around.-- And constellations farther from the pole of the sky are visible at some time of every clear night, for 9 or 10 months of the year.That is related to Earth's movement around the Sun.


Circumpolar constellations are visible all year long, depending on where you are viewing them from. At the north pole, or the south pole, some constellations are visible year-round, these are the circumpolar constellations. On the equator, there are no circumpolar constellations because of the earths rotation, that is why circumpolar constellations are at the "poles". Some of the circumpolar constellations can also be viewed from other parts of the same hemisphere, such as the big dipper and the little dipper, although they are circumpolar, they are also seen in other parts of the northern hemisphere. Circumpolar constellations in the northern hemisphere, will never be seen at the south pole, and vice versa. I hope this helped.


The constellations near the plane of the ecliptic (the zodiacal constellations) are only visible at certain times of the year. The constellations towards the poles (N and S) are visible at all times of the year from their respective hemispheres. In the South, the Southern Cross would be one example and in the North the Great Bear (or plough) would be another.


The constellations you can see become seasonal. Some are always visible and some disappear below the horizon for part of the year.


because the earth spins on an axis and during the different parts of the year certain constellations are visible.



The same constellations are visible every year. There is not a year associated with a particular constellation.


This is because of the fact that Earth moves in it's orbit around the Sun during the whole year due to which the constellations that appear in the night sky vary throughout the year.


Because the constellations that are visible during winter are on the other side of the sun during the summer. During the year the earth spins around the sun like a big satellite. So while the earth is constantly moving, the distance that the stars are away from us cause them to look stationary from our point of view some constellations can only be seen a few months out of the year.


There are a number of constellations that are visible year around, depending on your location. In the northern hemisphere (above about 30 degrees north) the constellations of Ursa Major Draco and Cassiopeia (to name only three) are always visible.


No. As we orbit the Sun different constellations become visible, but we can only see them when it is dark. Constellations are in the sky during daylight, but the Sun is so bright, we cannot see them. A few months after that, they start to be visible in the evenings and soon at night, by which time other constellations are in daylight and cannot be seen. You will see any constellation at the same time of year, every year. So the constellations you see in the night sky tonight are the same as the ones you will see on this date in any other year. The only thing that will differ is where the Moon and planets are.


because the circumpolar constellations are visible all year long and the others are not.


As earth orbits the sun, different constellations come into view while others disappear. Circumpolar constellations are visible all year long, other constellations are not.


The constellations make a "complete circle" over the course of a year... that is, the stars that were visible at midnight on October 17 this year are the same ones that were visible on October 17 of last year, and so on. If you can roughly identify midnight and you're familiar with the constellations, you can make a pretty good guess as to the date just by looking up, and figuring out the season is much easier than that.


If you're willing to depart now and then from a routine schedule of sleep and stargazing, you can probably see all of the constellations and visible stars in the sky within a period of a few months, from an observing location on the equator.


Every star you see is in the Milky Way, so you can say it is visible throughout the year. A particular line that looks like a trail or a sort of milky way goes through the night sky and can also be seen all year round in different constellations.


It moves through the 12 standard constellations that define the basic neighborhood of the ecliptic. These are the constellations you see listed in your morning paper's horoscope.


Most constellations are visible about 300 days per year. Only when the Sun is very close to that constellation is it entirely hidden. But since few of us get up before dawn to study the sky, we typically see only "evening" stars. Some constellations, such as Cassiopeia and Ursa Major are "circumpolar"; they are close enough to the celestial pole that they are, depending on your latitude, always visible. In order to provide a better answer, I would need to know your latitude. 47 degrees latitude


All stars within (your latitude) of the celestial pole are above your horizon all the time,and are visible to you whenever it's dark enough.


They are constellations that comprise the zodiac; constellations the Sun passes through in its journey across the sky over a year.


The Earth rotates around the sun, thus the "direction" of "night" is different as the year progresses.


Draco is just west (higher longitude) of Ursa Major and Ursa Minor. All three are "circumpolar" constellations visible for most of the year in the Northern Hemisphere.


There are no constellations in the northern hemisphere, but several of them are visibleto observers located there.Depending where you are in the northern hemisphere, you can see anywhere betweenhalf of all the visible stars (from the north pole) to all of the visible stars (from the equator).At any location on earth, Aries is visible during some part of the year.



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