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Topic: Greatest Conjunction


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In the News (Mon 16 Nov 09)

  
  Planet - LoveToKnow 1911
At superior conjunction the illuminated hemisphere of the planet is presented to the earth so that it presents the form of a full moon.
At the time of greatest elongation this angle is 90 0, and the planet appears one half illuminated, like the moon at first or last quarter.
Then, as it approaches inferior conjunction, the visible portion of the disk assumes the crescent form, and while the circle bounding the disk continually increases owing to the approach of the planet to the earth, the crescent becomes thinner and thinner until, near inferior conjunction, the planet is no longer visible.
www.1911encyclopedia.org /Planet   (2895 words)

  
 Astronomy Answers: Planetary Phenomena   (Site not responding. Last check: 2007-10-13)
A conjunction is always unfavorable for watching the planet, because the planet is then very close to the Sun in the sky, and hence not visible at night.
Inferior conjunctions of inferior planets are interesting in exceptional cases, namely when such a planet moves across the disk of the Sun, as seen from Earth.
The greatest possible elongation of a superior planet is always 180 degrees, when the planet is in opposition and therefore as far as possible from the Sun in the sky.
www.astro.uu.nl /~strous/AA/en/verschijnselen.html   (1696 words)

  
 Venus: Godess of Love and a Hell of a Planet
During the period from superior conjunction Venus changed from a tiny full disk only 10" (seconds of arc) in diameter to a half illuminated (quarter moon) disk 24" in diameter at greatest elongation.
At greatest elongation of a planet the sight line from the earth to the planet is a tangent to the planet's orbit, so the terminator, the line that separates day from night should exactly bisect the planet.
That's because the sun is sliding farther to the north on the horizon.
ourworld.compuserve.com /homepages/bmoler/venus.htm   (836 words)

  
 EXPLANATION INNER PLANETS
At superior conjunction, such planets appear as small circular disks, whose full phase is never really seen because of the inferior planet’s proximity to the Sun.
All greatest elongations are at the maximum separation between the sun and planetary centre for each apparition.
As the orbits of the inferior planets are not perfectly aligned to the plane of the planets, the ecliptic, it becomes rare for transits across the disk at inferior conjunction to occur.
homepage.mac.com /andjames/PageExpInnPlan003.htm   (928 words)

  
 Masha'allah On the Things of Eclipses of Luminaries, And of Conjunctions of Planets, And of Revolutions of Years
For indeed, the conjunction of Saturn and Jupiter is the greatest conjunction, and this signify events and divisions.
Besides, you understand, that their conjunction in humane signs signifies the multitude of sicknesses of people; and their conjunction in some of the angles of the year signifies confrontation of riches or kings, and multitude of wars; and this will endure until the planets will be joined another time.
And their conjunction in fiery signs signifies dryness and barrenness of the earth; and in airy signs it signifies winds; in watery ones it signifies multitude of rains; and in earthy ones it signifies ice and snow and intensity of chill.
www.worldastrology.net /articles/masha.html   (2721 words)

  
 SPACE.com --
In the morning sky, it is too close to the Sun to be easily observed, and in fact is in superior conjunction with the Sun on the 27th.
Superior conjunction means that it is in line with the Sun, but on the far side.
It is in conjunction with Mercury twice near the end of the month, but likely will be lost in the glare of the setting Sun by then.
www.space.com /spacewatch/sky_calendar.html   (1461 words)

  
 Astronomy Answers: Planetary Phenomena 2000   (Site not responding. Last check: 2007-10-13)
For perigee, apogee, declination, and conjunction spreads, those dates are listed at which the corresponding value changes from increasing to decreasing or from decreasing to increasing.
The dates listed for conjunctions are dates at which the difference between the geocentric ecliptical longitude of the planet and of the Sun is smallest (in size).
The dates mentioned for opposition and greatest elongation are dates at which the difference between the ecliptical longitude of the planet and of the Sun is closest to 180 degrees (in size).
www.astro.uu.nl /~strous/AA/en/verschijnselen/2000.html   (496 words)

  
 [No title]
conjunction 10 Pluto stationary 03-08-15 Moon at apogee 03-09-1014 1st QUARTER MOON 03-10 Mercury aphelion 03-14-04 Mars 9 deg.
conjunction 10-06-15 Uranus stationary 22 Saturn 6 deg.
Eclipse 10-09 1 Ceres conjunction 10-11 Mercury ascending node 10-13-09 Mercury stationary 10-15-02 Moon at apogee 10-16-1626 3rd QUARTER MOON Mercury perihelion 10-20-14 Mercury greatest Elong.
www.isc.tamu.edu /~astro/saturn/rhill.txt   (1410 words)

  
 Coming Full Circle:
After her inferior conjunction with the Sun, Venus emerges as a morning star, turns direct, reaches maximum western elongation, travels around to the far side of the Sun, makes her superior conjunction, emerges as an evening star, reaches maximum eastern elongation, turns retrograde, and makes her next inferior conjunction 584 days later.
Over the centuries, the inferior conjunctions of Venus slowly march around until one of them occurs near the north or south heliocentric node of Venus (where Venus’s slightly tilted orbit intersects the ecliptic, the apparent path of the Sun).
At these times, when Venus is conjunct the Sun in longitude, she is also conjunct in latitude, and a Transit of Venus occurs.
www.alabe.com /fullcircle.html   (2752 words)

  
 Planetary Aspects
Thus, Mercury's greatest elongation as seen from Venus is about 45 degrees, Venus' greatest elongation as seen from the Earth is about 45 degrees, and the Earth's greatest elongation as seen from Mars is about 45 degrees.
Thus, it moves from inferior conjunction to greatest western elongation, then to superior conjunction, then to greatest eastern elongation, and finally back to inferior conjunction.
As it happens, when the inner planet is at inferior conjunction, it would see the outer planet opposite the Sun, at opposition; so inferior conjunction and opposition are related, being the different views that each planet sees of the other, when one is in between the other and the Sun.
www.cseligman.com /text/sky/aspects.htm   (855 words)

  
 CLEA Mercury Rotation Lab
conjunction: An alignment of two bodies in the solar system with the Earth, so that they appear to be at the same place (or nearly so) in the sky as seen from the Earth.
Conjunctions can also occur between planets or between the Moon and one or more planets but, in that context, the word is often used more loosely to describe an approach within a few degrees.
The greatest elongation for Mercury lies between 18 and 28 degrees according to circumstances; the equivalent range for Venus is 45-47 degrees.
www.mines.edu /Academic/courses/physics/phgn324/CLEA/Merclab.html   (3857 words)

  
 Lesson 11 - The Positions of the Planets
When a planet is at its greatest angle to the Sun with respect to the Earth, that object is at its greatest elongation and that is the best time to view it.
The greatest elongation for the two inferior planets, Mercury and Venus, occurs when the line from the Earth to the inferior planet is at a tangent to the Sun.
No planet can be seen when it's in conjunction because it is either behind the Sun (at superior conjunction) or lost in the Sun's brightness as it passes in front of the Sun (at inferior conjunction).
www.synapses.co.uk /astro/planets1.html   (2583 words)

  
 One Reed Journal
The exact conjunction occurs midway in the retrograde period when Venus is moving quite rapidly (about 35-40 minutes arc per day) in one direction, while the Sun is moving direct in the zodiac at a rate of about a degree a day.
At this time the daily motion of Venus and the Sun are similar and consequently the conjunction remains within a 7 degree orb for nearly two months.
Greatest western elongation occurs when Venus is furthest from the Sun, about two months before the next inferior conjunction.
www.onereed.com /journal/archives/00000006.php   (640 words)

  
 astr_301_ch11ans.html
Greatest elongation occurs when the line of sight from Earth to Venus makes a right angle with a radius from the Sun to Venus.
Venus has a much shorter trip from greatest eastern elongation through inferior conjunction to greatest western elongation than it does form greatest western elongation through superior conjunction to greatest eastern elongation.
So from one inferior conjunction to the next is 584 Earth days, during which Venus completes exactly five of its days since 584/116.8 = 5.
www.calpoly.edu /~jpoling/Astr_301/astr_301_ch11ans.html   (949 words)

  
 Ch 9  Marriage
Their exalted positions and slow motions meant that their conjunctions were of more universal and enduring significance than those of the other planets.
Hence, the time between any two conjunctions of Saturn and Jupiter will be approximately twenty years, during which time Saturn will have traveled a little more than two-thirds of the way through the zodiac.
Thus, in the astrologers' customary example, if the first conjunction of Saturn and Jupiter occurs in Aries, the second will be in Sagittarius, the third in Leo, and the fourth in Aries again.
gfisher.org /chapter_9.htm   (3139 words)

  
 Greatest conjunction - Wikipedia, the free encyclopedia
Greatest conjunction is a term applied in astronomy to a conjunction of the planets Jupiter and Saturn at or near their opposition to the Sun.
6 BC — was theorized to be a greatest conjunction; and some went so far as to assert that it was an occultation of Saturn by Jupiter, with the two planets appearing to merge into a single object as seen from Earth.
At the greatest conjunction in 6 BC, which is said to be that was the "Star of Bethlehem", the minimum distance between Jupiter and Saturn was around 1 degree, this is twice the Moon's diameter.
en.wikipedia.org /wiki/Greatest_conjunction   (231 words)

  
 Venus at greatest eastern elongation   (Site not responding. Last check: 2007-10-13)
Greatest elongations are the optimal moments to observe the inferior planets, because the solar light is less annoying.
In March 29th, Venus is at the greatest eastern elongation.
This greatest elongation is exceptional because, after March 29th, Venus will reduce its elongation before going in front of the Sun and becoming, at June 8th, the Transit of Venus, one of the most exceptional phenomena in astronomy.
mercuri.am.ub.es /venus2004_eng.html   (496 words)

  
 Celestial Events - Paulucci Space Theatre
Mercury is at inferior conjunction on November 24.
The giant planet was in conjunction with the Sun on October 22.
Greatest elongation: When a planet interior to Earth's orbit is at its greatest angular separation from the Sun.
www.spacetheatre.mnscu.edu /astronomy.html   (853 words)

  
 Venus - Crystalinks
Its greatest elongations occur approximately 70 days before and after inferior conjunction, at which time it is half full; between these two intervals Venus is actually visible in broad daylight, if the observer knows specifically where to look for it.
Infact through a telescope Venus at greatest elongation appears less than half full due to Schröter's effect first noticed in 1793 and shown in 1996 as due to its thick atmosphere.
The rotation rate of Venus was first measured during the 1961 conjunction, observed by radar from a 26 m antenna at Goldstone, California, the Jodrell Bank Radio Observatory in the UK, and the Soviet deep space facility in Evpatoriia.
www.crystalinks.com /venus.html   (3353 words)

  
 Lesson 12 - The Motion of the Planets
After greatest eastern elongation the distance between the Sun and Venus MUST decrease but that does not necessarily mean VENUS must change its direction to move closer to the Sun.
It doesn't reach greatest eastern elongation in 88 days (its sidereal period) because after 88 days the Earth has moved on a little further so Mercury has to catch up to the Earth at its new position in order to "present" itself to the Earth.
For example, Mercury was at its greatest eastern elongation on December 3rd 1999 and again at its greatest eastern elongation on June 9th 2000 and October 6th 2000.
www.synapses.co.uk /astro/planets2.html   (4040 words)

  
 Venus
The pattern of Venus is usually reckoned at Inferior Conjunction, that time when Venus passes between the Sun and the Earth.
When it first rises after inferior conjunction, that is when it was first spotted in the morning sky, called heliacal rising because it is rising with the sun, was the most important position of Venus.
Venus had a psychological effect upon the Maya and other Mesoamerican cultures, it has been shown that the Maya were timing some of their wars based on the stationary points of Venus and Jupiter.
www.michielb.nl /maya/venus.html   (403 words)

  
 Ptolemy's Tetrabiblos: Appendix: No. III. The Centiloquy, or Hundred Aphorisms of Claudius Ptolemy; Otherwise Called, ...
The efficacy of purgation is impeded by the Moon's conjunction with Jupiter.
In the conjunction of Saturn and Jupiter, pronounce according to the nature of that one which may be higher in elevation.
In the least conjunction, the difference of the mean conjunction, and in the mean conjunction the difference of the greatest conjunction.
www.sacred-texts.com /astro/ptb/ptb76.htm   (3175 words)

  
 PLANET (Gr. ssXavirrns... - Online Information article about PLANET (Gr. ssXavirrns...   (Site not responding. Last check: 2007-10-13)
conjunction the illuminated hemisphere of the planet is presented to the earth so that it presents the form of a full moon.
As it moves towards inferior conjunction, the lines from the planet to the sun and to the earth, or the See also:
crescent form, and while the circle bounding the disk continually increases owing to the approach of the planet to the earth, the crescent becomes thinner and thinner until, near inferior conjunction, the planet is no longer visible.
encyclopedia.jrank.org /PIG_POL/PLANET_Gr_ssXavirrns_a_wanderer.html   (3203 words)

  
 Venus...Astroppo.com   (Site not responding. Last check: 2007-10-13)
It is sometimes referred to as the "Morning Star" or the "Evening Star", and when it appears it is by far the brightest point of light in the sky.
He also noted changes in the size of Venus' visible diameter when it was in different phases, suggesting that it was farther from Earth when it was full and nearer when it was a crescent.
Curiously, Venus (and also Mercury) is not visible from Earth when it is full, since at that time it is at superior conjunction, rising and setting concomitantly with the Sun and hence lost in the Sun's glare.
www.astroppo.com /venus.html   (3319 words)

  
 Aspects and Phases of the Planets   (Site not responding. Last check: 2007-10-13)
Greatest Elongation refers to the largest separation of the planet from the Sun in our sky, either to the East, or to the West.
Thus, we see that the inferior planets exhibit a complete set of phases (just like the Moon) as viewed from the earth, and can never be further from the Sun than the angles defined by greatest elongation.
Comparing with the preceding diagram for the inferior planets, we notice two basic differences: (1) The superior planets do not exhibit a full range of phases; they are always gibbous or full.
csep10.phys.utk.edu /astr161/lect/celestial/aspects.html   (291 words)

  
 Johannes Kepler
The power of Saturn and Jupiter to humidify is greatest at conjunction or opposition with the Sun and least at the quadratures.
A heavy storm had begun during the evening of May 27, and since Kepler knew that storms were associated with Mercury at inferior conjunction, he thought that perhaps the calculations were inaccurate and that the conjunction was actually occurring earlier than the 29th.
In the loft of his house, single sun rays shone through the thin cracks of the roof, and he held a piece of paper against one ray and saw a little picture of the sun, on which there was a tiny fl dot.
www.onereed.com /articles/vvf/ec4.html   (2831 words)

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