Zodiac constellations - Vector stencils library

The vector stencils library "Zodiac constellations" contains 24 icons of Zodiac constellations star charts and Zodiac sign symbols.
Use these shapes to draw astronomical diagrams and illustrations in the ConceptDraw PRO diagramming and vector drawing software extended with the Astronomy solution from the Science and Education area in ConceptDraw Solution Park.

Design elements - Zodiac constellations
The vector stencils library "Zodiac constellations" contains 12 star constellation charts.
"In Western astrology, astrological signs are the twelve 30º sectors of the ecliptic, starting at the vernal equinox (one of the intersections of the ecliptic with the celestial equator), also known as the First Point of Aries. The order of the astrological signs is Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces." [Astrological sign. Wikipedia]
"Constellations.
The zodiacal signs are distinct from the constellations associated with them, not only because of their drifting apart due to the precession of equinoxes but also because the physical constellations take up varying widths of the ecliptic, so the sun is not in each constellation for the same amount of time. Thus, Virgo takes up five times as much ecliptic longitude as Scorpius. The zodiacal signs are an abstraction from the physical constellations, and each represent exactly one twelfth of the full circle, or the longitude traversed by the Sun in about 30.4 days.
Some "parazodiacal" constellations are also touched by the paths of the planets. The MUL.APIN lists Orion, Perseus, Auriga, and Andromeda. Furthermore, there are a number of constellations mythologically associated with the zodiacal ones : Piscis Austrinus, The Southern Fish, is attached to Aquarius. In classical maps, it swallows the stream poured out of Aquarius' pitcher, but perhaps it formerly just swam in it. Aquila, The Eagle, was possibly associated with the zodiac by virtue of its main star, Altair. Hydra in the Early Bronze Age marked the celestial equator and was associated with Leo, which is shown standing on the serpent on the Dendera zodiac. Corvus is the Crow or Raven mysteriously perched on the tail of Hydra.
Due to the constellation boundaries being redefined in 1930 by the International Astronomical Union, the path of the ecliptic now officially passes through thirteen constellations: the twelve traditional 'zodiac constellations' plus Ophiuchus, the bottom part of which interjects between Scorpio and Sagittarius. Ophiuchus is an anciently recognized constellation, catalogued along with many others in Ptolemy's Almagest, but not historically referred to as a zodiac constellation. The inaccurate description of Ophiuchus as a sign of the zodiac drew media attention in 1995, when the BBC Nine O'Clock News reported that "an extra sign of the zodiac has been announced by the Royal Astronomical Society". There had been no such announcement, and the report had merely sensationalized the 67-year-old 'news' of the IAU's decision to alter the number of designated ecliptic constellations." [Zodiac. Wikipedia]
The star maps example "Design elements - Zodiac constellations" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Astronomy solution from the Science and Education area of ConceptDraw Solution Park.

The vector stencils library "Zodiac constellations" contains 24 icons of Zodiac constellations star charts and Zodiac sign symbols.
Use these shapes to draw astronomical diagrams and illustrations in the ConceptDraw PRO diagramming and vector drawing software extended with the Astronomy solution from the Science and Education area in ConceptDraw Solution Park.

This astronomic diagram example was redesigned from the Wikimedia Commons file: Extragalactic distance ladder.JPG.
[commons.wikimedia.org/ wiki/ File:Extragalactic_ distance_ ladder.JPG]
Red boxes: Technique applicable to star-forming galaxies.
Green boxes: Technique applicable to Population II galaxies.
Cyan boxes: Geometric distance technique.
Pink box: The planetary nebula luminosity function technique is applicable to all populations of the Virgo Supercluster.
Solid lines: Well calibrated ladder step.
Dashed lines: Uncertain calibration ladder step.
"The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances with methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.
The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung." [Cosmic distance ladder. Wikipedia]
The astronomy diagram sample "Extragalactic distance ladder" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Astronomy solution from the Science and Education area of ConceptDraw Solution Park.