Should Uranus, Neptune & Pluto be included and considered in a chart? In my opinion, yes. I want to respectfully put forth my opinion out here without in any way discrediting so many Vedic astrologers who make accurate predictions without these 3 planets.
Even among Western astrologers, most consider these 'outer' planets as less important than the 7 classical 'inner' planets. I am referring to Sun, Moon, Mercury, Venus, Mars, Jupiter & Saturn. The main reason is, these planets are much further away from Earth, so they exert a far less gravitational as well as astrological influence on us.
My acceptance of these 3 planets in a birth chart is based on my subjective, anecdotal experiences with them. Transits of these planets in my natal chart had caused significant turbulence in my personal life, to put it mildly. I fell extremely ill during the time when Pluto just reached my 12th house of Self-Undoing, which is opposite the 6th house of Health. It also formed many aspects with many other planets, and was considered a dangerous time. But I didn't know it because it happened during my younger days when I was still a Christian and wasn't supposed to believe in these things. It was only many years later in retrospect - when I was more open-minded about such things - that I checked my own Western chart, compared it with the time of the accident, and realised I could have avoided this had I learnt astrology sooner.
Without considering Pluto, it is still possible to predict the time of the accident - with the Moon, Mars and Saturn forming aspects too. But it will be harder to infer.
I agree with most Western astrologers here. The (primary) inner planets are related to the conscious, material and physical aspects of reality. The (secondary) outer planets are related to the subconscious, the hidden, the innovative and spiritual aspects of reality. The primary is important; but the secondary is not necessarily less important. It depends on the chart. Uranus rules Aquarius, Neptune rules Pisces, Pluto rules Scorpio. If these 3 planets form strong aspects with other planets & ASC / MC / virtual points in your natal chart, they will manifest more easily. Also, if any of the planets & ASC / MC / virtual points feature prominently in these 3 signs in your natal chart, the 3 planets will also manifest more easily. Transiting luck will trigger off the events.
PS: This last portion is for beginners, but also for advanced astrologers who want to re-learn or are open-minded about considering these planets in their analysis. Here I will compile some info from some online articles about these 3 planets:
Uranus - innovation, sudden change, revolution, science & technology
The discovery of Uranus is attributed to William Herschel, who first saw it on 13 March 1781 when trying out a new telescope. Its most striking feature is the T-square involving Uranus opposite Mars and Saturn, squared by the Sun. One may say that the Sun brought the new planet to light, and Saturn brought it down to earth. The Uranus-Saturn cycle is associated with the natural sciences and Herschel had been born at a previous opposition. There does seem to be something inhuman about this T-square; the fact that the Moon, Venus, and Mercury are all unaspected makes it worse. The chart can be read as the nativity for the age of scientism: intellect (Uranus in Gemini) without feelings (Moon and Venus) or reason (Mercury), compounded with arrogance (Saturn-Mars-Uranus).
The discovery of Uranus has often been connected with both the American and French revolutions, and aviation.
The Greek name Ouranos refers to the sky. We recall the myth of Ouranos' castration and deposition by his son Kronos (Saturn). Robert Chandler ('Uranus and Prometheus', Astrological Journal, vol. 38, no. 1) has pointed out that the myth is actually shown in the discovery chart: Saturn opposing Uranus with the aid of Mars (surgery).
Earlier astrologers did not rely on the mythological associations of the name to determine the nature of Uranus. When John Varley and John Corfield did that at the beginning of the nineteenth century, it was by observing its effects in nativities.
Neptune: intuition, dreams, illusion, spirituality
In the chart for the discovery of Neptune, we find the planet in conjunction with Saturn and in the sign and terms of Saturn: it takes a lot of Saturn to bring Neptune down to earth. This conjunction seems very characteristic of the Victorian age: hard working and capable, but often unable to find the balance between the materialistic and the visionary.
The Saturn-Neptune cycle commencing at the discovery has been particularly significant for communism. In 1848 the Communist Manifesto was published (and Europe was swept by a series of particularly romantic and inept revolutions), while subsequent conjunctions marked both the Russian revolution and collapse of European communism.
Neptune is also associated with both cults and the occult, and some striking events in this connection followed its discovery. In 1847 a Chinese clerk decided that he was the son of God, founded the Taiping cult, and attempted to conquer China; whilst in America, the Mormons set out for Utah to create their theocratic community. In 1848 the Fox sisters produced the poltergeist manifestations that led to the spiritualist movement; even if they were frauds, that too is Neptunian.
Pluto: the hidden truths & aspects of life, profound change, destruction, rebirth, catalyst for deep personal & societal shifts, confronting deepest fears, insecurities, ultimately leading to transformation & regeneration
The search was started by Percival Lowell in 1877 and continued on and off until Clyde Tombaugh found the planet in 1930. The reason for the long delay was that they had been looking for a much brighter object - a planet several times larger than the Earth.
Lowell's nativity (7.30 a.m. LT, 13 March 1855, Boston Mass.) responded to the discovery, transiting Pluto opposing his tenth house Moon. It is interesting that the two planets with which Lowell was chiefly concerned, Pluto and Mars, were both unaspected in his nativity: was he trying to fill a personal void?
It is perhaps typical that Pluto should conceal himself in his twelfth house, though he is in conjunction with the East Quarter*. The fourth harmonic chart, indicating how he will manifest in worldly affairs, shows a striking T-square: Pluto in opposition to a Venus-Neptune conjunction, squared by Mars.
(*Eastern Quarter refers to the 10th, 11th & 12th houses in traditional Western astrology.)
As with the other new planets, the discovery chart presaged and responded to appropriate events. Thus one of the rulerships of Pluto is atomic energy. In 1932, Cockcroft and Walton split the atom. At the end of 1942 nuclear fusion was achieved, with transiting Pluto opposing radical Mars in the discovery chart. When the atomic bomb was dropped on Hiroshima in 1945, transiting Saturn opposed radical Pluto.
