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Kepler explains why the planets have elliptical orbits Source





The Daily Motion of each of the planets varies depending on the position of the planets in the sky.

Daily Motion of Planets: Table showing the differences between fast, slow and average movements for each planet in a day, from Lilly's "Christian Astrology."

Geocentric Speed of Revolution This is table showing the time it takes each planet to make a complete tour of the Zodiac, as seen from Earth, average motion in a day or a year, and speeds in each of the signs.




The Path of the Planets around the Sun is an ellipse rather than a circle. This was one of the discoveries of Kepler in his Laws of Planetary Motion. It was well known the Astrologers that the planets moved faster in some signs than others and they had developed a number of terms defining the relationships between the signs. The number of days in Zodiac sign varies. The Earth is moving fastest when the Sun appears to rise in the signs of "Short ascension".

The Speeds also seem to vary from the perspective on Earth when a planet goes Retrograde.

Table: Daily Motion of Planets

Table showing the differences between fast, slow and average movements for each planet in a day, from Lilly's "Christian Astrology."

Planet Moon Sun Mercury Venus Mars Jupiter Saturn
Slow below 12° 15 m 00 s 00° 57 m 16 s 00° 20 m 00 s 00° 15 m 00 s 00° 10 m 00 s 00° 03 m 00 s 00° 02 m 00 s
Average Speed 13° 10 m 36 s 00° 59 m 08 s 00° 59 m 08 s 00° 59 m 08 s 00° 31 m 27 s 00° 04 m 59 s 00° 02 m 01 s
Fast above 14° 10 m 00 s 01° 01 m 00 s 01° 40 m 00 s 01° 10 m 00 s 00° 43 m 00 s 00° 12 m 00 s 00° 06 m 00 s

  • ° = degrees m = minutes of a degree, s = seconds of a degree
  • Note that Saturn is WEAKER when it is faster, the others are stronger at higher speeds.
  • To be considered fast or slow, a planet needs to be significantly distant from the average speed.

Table: Geocentric Speed of Revolution

This is table showing the time it takes each planet to make a complete tour of the Zodiac, as seen from Earth, average motion in a day or a year, and speeds in each of the signs.

Planet Time to complete Orbit Average Motion Day Average Motion Year Average Time in a Sign Signs of fastest travel Fastest Degree Signs of slowest travel Slowest Degree
Moon 27 days 7 hours 43 seconds 13° 10m 36s 12 x 360° + 120° 2 - 2.5 Days        
Sun 365.25 days 59m 8s Daily 360° 30 Days Sagittarius, Capricorn,
Aquarius
0° Capricorn Gemini, Cancer,
Leo
0° Cancer
Mercury 87.9 days 59m 8s 360° 30 Days or
60 days when Retrograde
       
Venus 224.7 days 59m 8s 360° 30 days or
120 days when Retrograde
       
Mars One year plus 321 days 31m 27s 60 Days or
7 months
180° Aquarius, Pisces 6° Pisces Leo, Virgo 6° Virgo
Jupiter 12 years 4m 59s Daily
30° per Year
30° 1 Year Aries 15° Aries Libra 14° Libra
Saturn 29 years 157 days 2m + 1 second 12° 2.5 Years Gemini, Cancer 3° Cancer Sagittarius, Capricorn 3° Capricorn
Uranus 84.1 years   7 Years Virgo 18° Virgo Pisces 22° Pisces
Neptune 165 years   2.5° 14 Years Taurus 26° Taurus Scorpio 26° Scorpio
Pluto 248 years   1°-3° 13-32 Years Scorpio, Sagittarius 14° Scorpio
(1989)
Taurus 13° Taurus
North Node 19 years .13° 47° Rx 1.6 years        
Source: Theosebia, Tables of Planetary Phenomena, Michelsen

  • Rx - The Moon's Nodes move retrograde through the zodiac, the opposite direction as the Sun.
  • Planet Nodes We hear lots of chatter about the Moon's Nodes, but what about the other planets, do they have nodes too? Also includes information on the the location of the nodes and dates each of the planets is Conjunct its Nodes, Perihelion and Aphelion.
  • Declination ¿Declination
  • See Zodiac Tables Complete guide to Tables on specific topics corresponding to the signs of the Zodiac. This includes charts defining the zodiac dates, dignities and rulerships, specific relationships with degrees of the zodiac and numerous charts looking at individual topics to see which sign best relates to it.

Fun Facts about of Planets Orbits

The Moon

  • The Moon Travels through all the signs every month.
  • In exactly one year, the Moon is Trine its position the previous year.
  • The New Moon always occurs in the same sign as the Sun.
  • The Full Moon is always in the sign opposite the sun in the zodiac.
  • Since the Moon orbits the Earth, its speed is not linked to Zodiac signs from our geocentric point of view.

Mercury

  • Planet Mercury travels through all the signs each year, shortly before or after the sun does.
  • Mercury is always within 30 degrees (one sign) of the sun.

Venus

  • Planet Venus travels through all the signs each year, shortly before or after the sun does.
  • Venus is never more than 45 degrees (1.5 signs) before or after the sun.
  • Venus goes retrograde every other year.
  • Venus travels through an average of twelve signs a year.
    • It travels @11 signs in year it is retrograde.
    • It travels @13 signs in year it is not retrograde.

Mars

  • In the two year cycle:
    • Marstravels direct through seven signs covering 210°)
    • in alternating years it goes Retrograde, traversing only five signs.
  • Mars Retrograde period keeps Mars in the same degrees for 7 months.

Pluto

  • Pluto spends an average of 29 years per sign, although this is misleading - It spends 13 years in Sagittarius and 32 years in Taurus. See Planet Pluto for more details on the time in the signs. see table at Planet Pluto


Related pages:

Speed Of Ascension ¿Speed Of Ascension

Last edited March 17, 2009 (history)
 
   

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