Gan De Totally Explained

Everything about Gan De totally explained

Gan De (fl. 4th century BC) was a Chinese astronomer/astrologer born in the State of Qi also known as the Lord Gan (Gan Gong). Along with Shi Shen, he's the first in history to compile a star catalogue, followed by the Greek Hipparchus who was the first in the Western tradition to create a star catalogue.

Observations

Gan De made some of the first detailed observations of Jupiter in recorded history. He described the planet as "very large and bright". Gan De is reported to have seen one of the moons of Jupiter (either Ganymede or Callisto) with his naked eye in 364 BC, long before Galileo Galilei's celebrated discovery of the same in 1610 (all four of the brightest moons are technically visible to the unaided eye, but in practice are normally hidden by the glare of Jupiter). By occluding Jupiter itself behind a high tree limb perpendicular to the satellites' orbital plane to prevent the planet's glare from obscuring them, one or more of the Galilean moons might be spotted in favorable conditions. Shi and Gan together made fairly accurate observations of the five major planets.

Planetary periodic comparisons

Further Information

Get more info on 'Gan De'.

External Link Exchanges

Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:

<a href="http://gan_de.totallyexplained.com">Gan De Totally Explained</a>

Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned.