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Each new star we find is generally considered to be part of the constellation it is nearest to.

Our Sun is obviously a star, just much closer. Is our Sun part of any constellation? If so, which constellation is it a part of?

nearby contellations

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4 Answers 4

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Constellations are human constructs to make sense of the night sky. When you are trying to find your way around, it helps to "chunk" stars into patterns and assign those groupings names. When I want to point out a particular object in the sky (say Polaris, the North Star), I start by pointing out a familiar constellation (say Ursa Major, the Big Dipper). From there, I can tell my friend to follow this or that line to get them to look where I'm looking:

Finding the North Star

With the advent of computerized telescopes and large data sets, constellations are less important for professional astronomers. However, many stellar databases use Flamsteed or Bayer designations, which assign stars to constellations. In order to include all stars, the sky is divided into irregular regions that encompass the familiar constellations.

So, which constellations is the Sun assigned to? Well, from the perspective of someone on the Earth, the Sun moves through the constellations throughout the course of the year. Or rather, Sol moves through the region of the sky where some of the constellations would be seen if its light did not drown out distant stars. Our moon and the rest of the planets move through those same constellations. (The Greek phrase which gives us the word "planet" means "wandering star".)

The current position of the sun against the background of distant stars changes over the course of the year. (This is important for astrology.) It's a little easier to make sense of with a diagram:

How the sun is aligned with a particular constellation.

So perhaps a better question is:

What constellation does the Sun belong to today?

Presumably an observer on an exoplanet would assign Sol to some constellation that is convenient from her perspective. But from our perspective within the Solar system our sun, moon, and planets are not part of any constellation.

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Why do you say Sun sometimes, and Sol other times? Sol is the portuguese word for Sun... –  Rodrigo Jan 21 at 15:29
    
@Rodrigo: Yes. It's also the Latin word for the Sun. I hoped to convey that observers outside of our stellar system wouldn't have any particular attachment to our star. If it were close enough, they might have named it. (And while they wouldn't have named it "Sol", that's a pretty good placeholder.) My answer is trying to shift your perspective from thinking about the Sun as special (which, of course it is to us) to thinking of it as one of billions of stars. –  Jon Ericson Jan 21 at 16:08

No, it does not. The constellations are fixed (on time scales long enough for humans to consider as fixed, at least) patterns of stars which exist on the celestial sphere. This celestial sphere is a coordinate system which has the Earth at its center. From the Earth's perspective, the sun rises and sets at the same rate as the constellations, but as the Earth revolves around the sun, the constellation the sun will appear to be in will change.

However, the constellation the sun appears to be in (if projected onto the celestial sphere), is exactly how the constellations of the Zodiac are determined.

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We did an exercise on this particular subject at Secondary Modern School in 1958. With reference to"Patrick Moor" publications a 3-dimentional model wasmade of the nearest 50 stars. Particular reference to the "well known" ie:the plough.As the model evolved,those we are familiar with loose their familiarity because of the distance.The plough is familar if assumed all the same distance,they are not and the model highlights the lack of pattern if viewed from Orion's Belt. Our Sun did not appear to fit into any"Constellation type pattern"from any angle and all familiar ones were lost when viewed anywhere else. An interesting "Experiment" though.Try it.Cheers Colin

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Yes, but it does not stay in the same constellation.

The Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune and all the other solar system objects move across the constellations of the Zodiac: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpius, Sagittarius, Capricorn, Aquarius, Pices and Ophiuchus.

As of March 28, 2014, the Solar System is most likely traveling through Cancer, Virgo or Libra and will move on to Scorpius.

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"... the Solar System is most likely traveling ..." -- I think you mean the Sun is most likely traveling. –  Keith Thompson Mar 29 '14 at 0:40
    
I think DeathItself misunderstood the question. –  HDE 226868 Jan 9 at 16:01

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