is a Perpetual Sky Calendar of the Southern Hemisphere
Sky Calendar of
|The size of an
Astroplot chart is 62 cm x 91 cm.
The size of an
Astroplot chart is 62 cm x 91 cm. A quality print on satin
paper, coated with anti-glare varnish. A metallic gold circle
frames 12 sky maps. The centre chart features a 365 day calendar
that is precisely aligned with RA space coordinates and the
Sun's path (ecliptic) across the Zodiac. The bottom chart
identifies the names of the major constellations and stars.
Hour Passage of the Sky : The Clock Process
The passage of the stars,
Sun and ecliptic is a consistent annual course. The Astroplot Calendar
has 12 charts that show the location of stars in the Southern Hemisphere
sky. Next to each month name is a star chart that reflects the night
sky around 8 p.m. Months that occur during daylight saving time
present the sky at around 9 p.m.
For any selected month,
sky views over a 24 hour period for that month are illustrated when
the charts are referred to as a series. To locate stars and the
path of the ecliptic for a particular time, refer to the 12 charts
as a clock. A 2 hour progression of the sky is reflected by referring
from one chart to the next. Begin the clock count at 8 p.m. for
standard time months. Start counting from 9 p.m. for daylight saving
Whatever month you begin
from, the "Clock Process" is consistent. For example,
to utilize the 24 hour sky reference for September, begin at the
September chart that shows the sky at 8 p.m. Step one month clockwise
to the October chart for a representation of the September sky at
10 p.m. By moving another step, a two hour progression step, clockwise
from October to November, the 12 a.m. September sky is represented.
The December chart reflects the sky a 2 a.m. in September, being
three 2 hour steps, or plus 6 hours from the starting month.
Astroplot charts, the ecliptic shows the passage of the Sun across
the sky. The ecliptic is also a guide to locate the passage of
the Moon and planets.
to Plot the Sun in Zodiac Constellations.
The center of the Astroplot
chart is a circle calendar with months and days, dates. Lines extend
from dates to the ecliptic. The ecliptic is the apparent path that
the Sun travels during a year. The annual ecliptic circuit is plotted
through the 12 Zodiac constellations.
Refer to the Astroplot
Calendar to find when and where the Sun moves in the Zodiac constellations.
From a selected date on the circle calendar rim, trace towards the
centre. Stop where the ecliptic and dateline meet. On that date,
the Sun is in that RA degree of sky. A reference to identify the
vicinity of the Sun in the Zodiac constellations for any selected
On your birthday, the
Sun is in the same location every year. .Why
does the astrology calendar indicate the Sun is in a different constellation
to the actual location?
In the centre, the celestial
coordinates, right ascension degrees (0 - 360) and hours (0 - 24),
are indicated. Refer to the celestial coordinates to plot the location
of the Sun, Moon and planets on the ecliptic.
The names and symbols
of the Zodiac constellations are identified. Stars in the vicinity
of the Zodiac are shown without their constellation figures.
Chart Plot. Course of the Ecliptic.
The Astroplot displays
a star chart for each month of the year. A panoramic view of the
night sky is displayed with stars and constellation figures. Star
magnitudes are indicated so bright stars are prominent as they are
in the night sky. What appears as light cloud across the charts
is the Milkyway, a view of our galaxy, which is comprised of millions
Each chart shows the
ecliptic, being the path the Sun appears to travel across the sky.
The Moon and planets travel close to the ecliptic, so it is guide
that indicates their rise and set path. The ecliptic path varies
throughout the course of 24 hours, with the rise coordinates of
the ecliptic slowly shifting between a SE and NE bearing. There
is a corresponding pattern shift for the bearings of the setting
ecliptic, between SW and NW. Using the "Clock Process"
the ecliptic bearings are plotted throughout the night. The time
for the rise and set bearings of the ecliptic gradually adjusts
relevant to the seasons.
Astroplot has 12 star
charts, presenting the sky for each month. The September Chart:
The 'cloud' across
the chart represents the millions of star that consist of the
Bearings on the chart,
indicated in blue, are for orientation. Face north and south is
behind. The zenith is directly overhead. The ecliptic, Sun, stars,
Moon and planets, rise from the eastern horizon and set below the
sphere is an imaginary sphere whose centre is the Earth.
is a used to measure the degrees of latitude above or below the
celestial equator on the celestial sphere.
ascension RA is
used to measure the degrees of longitude on the celestial sphere.
Right ascension begins at 00 at the vernal equinox.
At the bottom of the
Astroplot poster is a rectangular star chart (mercator projection)
represents the sky that surrounds Earth. The celestial coordinates
on the column indicate declination. The row of right ascension coordinates,
degrees and hours, match the coordinates on the centre chart.
Refer to the chart to
identify the names of major stars, written in blue.
Prominent constellations names are distinguished in pink.
the brightness of stars and planets.
The scale indicates
the brightest star, -1, to 5, the lowest brightness detected by
the human eye.
Not all stars are white.
Some stars have a noticeable colour, such as red for the star
Betelgeuse, in Orion. Other stars have a spectral of blue, yellow
or orange. Astroplot charts display star spectral.
Above: The 'cloud'
across the chart represents the millions of star that consist
of the Milkyway.
Right : From Earth,
the Milkyway, a band of compacted stars that look like a river
of cloud. The Milkyway, with Scorpio in the middle.