The Grand Menhir of Locmriaquer is the largest in Brittany. It was erected
round 3,500BC and probably its main purpose was to assist astronomical observations.
The Grand Menhir of Locmriaquer is an unpolished block of stone planted in the
ground as most menhirs are.
The Grand Menhir
3000BC - Constellations are first recognised
It was around this time that star constellations were first recognised.
2750BC - Ancient Structures Point to the Stars
For the first time man made structures including Stonehenge and the Pyramids
are aligned in such a way that the Sun and/or chosen Stars shine though
carefully selected openings at special times in the year including solstice
as in the case of Stonehenge.
2296BC - Comets Catalogued For First Time
For the first time Chinese astronomers are making records of comets within
the Earth's vicinity. Such knowledge is not shared and remains within the
reach of very few within the emperor's courts for thousands of years.
1600BC - Constellations Are First Identified
Astronomers in Mesopotamia (modern Iraq) identify the constellations of
the zodiac. These are the constellations the Sun moves through every year.
1300BC - Chinese Establish Length Of A Year
Astronomers in China calculate the length of the year to 365 days and 6 hours.
Length of year.
585BC - Solar Eclipse Predicted By Thales
Thales of Miletus (Greek, 624BC-546BC) predicts a solar eclipse
for the first time. Modern astronomers have dated the solar eclipse
taking place on the 28th of May 585BC.
Solar eclipse. [Credit: NASA, GSFC]
530BC - Pythagoras Recognises Earth Is Sphere
Pythagoras of Samos is often described as the first pure mathematician
(Greek, 572BC-479BC). Pythagoras recognises that the Earth is a
sphere and suggests that other heavenly bodies revolve round it.
The new Opticstar DS-616C XL+ deep-sky CCD is the successor to the
popular DS-616C XL that earned the annual star product award back in 2013. It maintains all the
features of the original model as well as other improvements.
DS-616C XL is Astronomy Magazine's Star Product
posted: 12th September 2013
The Opticstar DS-616C XL deep-sky CCD camera has earned the annual star product award from
Astronomy, the world's best-selling astronomy magazine. Read about it in the September 2013 issue.
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Read the latest review about the A&M 152mm f/8 A&M/TMB on
According to the review this telescope combines the "beauty of a Ferrari" with
"fantastic performance". The review also states that "the manufacturer's claims are valid".