Astrology has been disregarded by the scientific community as having no explanatory capability for describing the cosmos. Scientific testing has revealed no evidence to substantiate the premises or alleged effects indicated in astrological traditions. However, there are many features of traditional astrology that are interesting and perhaps useful for explaining some aspects of human behavior.
The origin of zodiac signs is unclear. They may have originated from constellations that appeared in the night sky. Scientists think that over time these constellations became associated with the planets Jupiter, Mars, Mercury, Venus, Saturn, and Uranus.
There are two main types of zodiac signs: cardinal and ordinal. Cardinal signs are based on the positions of the sun, moon, and stars at birth. These include the signs of Cancer, Leo, Libra, Scorpio, and Sagittarius. Ordinal signs are based on the position of the sun, moon, and stars at the time of one's birth. These include the signs of Aries, Taurus, Gemini, Virgo, and Pisces.
Cardinal signs are more common than ordinal signs. They can be used to describe people who share the same solar return (the time when the sun rises on a given day and returns to the same place it started).
The scientific community has dismissed astrology as having no explanatory value for describing the cosmos. Astrology has not been shown to be useful in controlled experiments, has no scientific basis, and is hence classified as pseudoscience.
Soon after, NASA resorted to their official Tumblr to urge calm: "We study astronomy at NASA, not astrology. We didn't modify any of the zodiac signs; we simply performed the arithmetic "the agency stated.
However, some people interpreted the findings as evidence that the space agency did in fact alter the signs to make Virgo appear more prominent. The idea comes from a story told by astronomer Sir Isaac Newton about an alchemist who tried but failed to turn lead into gold. Frustrated, he put all his efforts into making silver become iron. Later, when asked why he had changed his mind, he said that although he had failed to make gold, he had succeeded in making iron which is useful instead. Same with Virgo - it's not that they wanted to make this sign more prominent, it's just that they thought it was important to have a sign that was sensitive and careful, so they made Virgo be instead bold and assertive.
Newton's account has been used by others to explain other changes they perceive in the zodiac. For example, some people think that because Virgo now joins Capricorn on the zodiac wheel instead of going directly ahead of it, that means that when Saturn moves into Capricorn in 2020, it will be joining a different part of the scale than it does now, and perhaps even changing orientation relative to Earth.
So, what is it about astrology that makes it so accurate? Astrology is based on scientific estimates of planetary motions and constellations. The stars and planets may not always have an impact, but they are time markers that help us comprehend what cycle we are in when a person is born. Also, there are an incredible number of births every day all over the world. It's impossible for any single person to know everything about everyone born within the last few hundred years.
The most accurate way to determine a person's date of birth using only the zodiac is with an astrological chart. An astronomer can tell you the position of the planets at the time of your birth, and these positions will fall into one of the zodiac signs. Because each planet takes approximately 12 years to complete one orbit around the Sun, and because the Earth travels along as well, being able to calculate where it is in its orbit allows us to estimate with great accuracy when was born.
However, due to the uncertainty of celestial bodies such as planets and stars, as well as human error, the position of planets at certain times does not necessarily mean that they were in exactly the same place as estimated by an astronomer. For example, if an astronomer guesses that Venus is half as far from the Sun as estimated by modern science, then it would appear half as bright as it does today when viewed from Earth.
Zodiacs, horoscopes, and the like are banned in Islam because they imply the belief that knowledge of the unseen is shared by anyone other than Allah. These types of astrology also include the devotion of the heart to persons other than Allah. Reading them is like reading about someone else's dream or vision and trying to interpret it as if it were one's own. Such interpretations may be based on false assumptions or pure speculation.
In Islam, only Allah has knowledge of the future. So any type of reading or writing a person's future by looking at their birth chart, walking around with them, etc is absolutely forbidden. This includes reading minds too; mind-reading is also considered inappropriate behavior in Islam.
The best way to understand the will of Allah is through prayer, fasting, and giving to charity; only He knows our true destiny. Astrology is a tool used by humans to explain the movements of the planets and stars above us; as humans we cannot fully comprehend such things so we turn to the only One who can: Allah.