Astrological signs birthdays

Learn what all the 12 zodiac signs mean and how it affects your life. Zodiac Signs and Astrology Signs Meanings and Characteristics Your Birthday.
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Zodiac signs were originally determined by which constellation the Sun was "in" on the day you were born. Early astronomers observed the Sun traveling through the signs of the Zodiac in the course of one year, spending about a month in each. Thus, they calculated that each constellation extends 30 degrees across the ecliptic.

However, a phenomenon called precession has altered the position of the constellations we see today. The first day of spring in the Northern Hemisphere was once marked by the zero point of the Zodiac. Astronomers call this the vernal equinox and it occurs as the ecliptic and celestial equator intersect. Unbeknownst to the ancient astrologers, the Earth continually wobbles around its axis in a 25,year cycle.

This wobble—called precession—is caused by the gravitational attraction of the Moon on Earth's equatorial bulge. Over the past two-and-a-half millennia, this wobble has caused the intersection point between the celestial equator and the ecliptic to move west along the ecliptic by 36 degrees, or almost exactly one-tenth of the way around. This means that the signs have slipped one-tenth—or almost one whole month—of the way around the sky to the west, relative to the stars beyond.

Astrology Signs - Zodiac Sign Dates & Personality Traits |

For instance, those born between March 21 and April 19 consider themselves to be Aries. Today, the Sun is no longer within the constellation of Aries during much of that period. From March 11 to April 18, the Sun is actually in the constellation of Pisces! Figure 2 See also Figure 3 , which demonstrates the precession of the equinoxes from BCE to In the beginning, Astrology and Astronomy were sister sciences, and developed side by side for Millennia.

Horoscope Compatibility Meter

At first, astrology was the more important of the two. However, in modern times, the science of astronomy has shown conclusively that astrology, while based on sound astronomical principles, is useless when it comes to analyzing personalities and predicting the future. Nevertheless, many people today still choose to believe in astrology, and there is big business in casting horoscopes. For that reason, we present here the Signs of the Zodiac, the 12 Zodiacal Constellations, to give you a chance to learn more about these constellations and the beautiful myths associated with them.

The constellations of the Zodiac

You will also be able to learn about the important astronomical objects which can be found in these constellations with a telescope, a pair of binoculars, or even the naked eye. According to astrology, the period of the year which each sign of the zodiac dominates is determined by the time in which the Sun is "in" its corresponding constellation. For that reason, it is not actually possible to observe a zodiacal constellation in the night sky during the time its sign is dominant. Instead, look for your constellation in the exact opposite time of the year.

For example, Sagittarius is designated as from November 22 to December However, if you want to observe Sagittarius, you will have to wait until Summer to see it. Instead, spend your observing time viewing Taurus. It is a shame that many people cannot distinguish the words Astronomy and Astrology as used in the English language. From a merely logical point of view, the name of the science which studies the material universe beyond the earth's atmosphere should be named astrology, and thus be consistent with such words as biology, ecology, and the names of other sciences.

However, language is not science, and is often not logical. The correct term is astronomy, and we should all strive to make a distinction between astronomy and astrology in general conversation. When misunderstandings about word usage come up, the best course of action is to check the dictionary and look up the etymology or history of the words in question.

According to Webster's Unabridged Dictionary, astronomy was a word that was first used in the Middle ages.

The definition is: "the study of the material universe beyond the earth's atmosphere. Astro- means "stars" and -nomy means "measurement", "distribution" or "arrangement.

Thus Astronomy is the arrangement of the stars. Thus Astrology means Knowledge from the Stars.

Zodiac Signs and Astrology Signs Meanings and Characteristics

The dictionary definition of Astrology is "the study of the stars in an attempt to determine their influence on human affairs. Of course, in our time, Astronomy is a science and Astrology is fortune telling. Gemini May 21 - June 21 Gemini the Twins is a Winter constellation, and can be best viewed in the night sky during the month of January.

Cancer June 22 - July 22 Cancer the Crab is a Winter Constellation, and can be best viewed in the night sky during the month of February. Leo July 23 - Aug.