Brad Snowder's Blog – March 2014 Archive (5)

History of Astronomy Part 2

strarguys2


halley_thumb Edmund Halley 1656-1742

Among his many studies are tides, magnetism, and trade winds. He cataloged 341 southern hemisphere stars and discovered a star cluster in Centaurus. He also made the first complete observation of a…
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Added by Brad Snowder on March 30, 2014 at 12:21am — 3 Comments

History of Astronomy Part 1

evolved2 There have been thousands of science geeks contributing to astronomy over the centuries and millennia. Here are a mere handful that have been selected from some of the most significant figures. Some of these people are real icons of human history, big thinkers. As Isaac Newton once said "If I have seen farther than others, it is because I have stood on the shoulders of giants."…

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Added by Brad Snowder on March 22, 2014 at 10:52pm — No Comments

Galaxies

Not to scale. "The infinitude of creation is great enough to make a world, or a Milky Way of worlds, look in comparison with it what a flower or an insect does in comparison with the Earth." ~ Immanuel Kant



Galaxies are monstrous collections of stars, plus dust, gas, light matter, dark matter, and gray matter. In a fundamental way galaxies are…

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Added by Brad Snowder on March 15, 2014 at 10:30pm — No Comments

Cosmology

001 "The drum in a dream pounds loud to the dreamer." ~ Carl Sandburg



Anisotropy: This term is frequently used to describe the temperature fluctuations in the Cosmic Microwave Background. The word means not uniform, or not the same. Like if you dressed a calico cat with a plaid kilt then filled it with dark energy and exploded it for 13.76 billion years.



Belief:…

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Added by Brad Snowder on March 8, 2014 at 11:48pm — 2 Comments

Celestial Coordinates

altitude-azimuth I must go down to the seas again,

To the lonely sea and the sky.

And all I want is a tall ship,

And a star to steer her by.


~ John Masefield



Suppose you lived in olden times and you joined a fleet of wooden ships and iron men. Or maybe it's wooden teeth and dirty old men. Whichever. But if you didn't know the basics of using a star to steer a…

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Added by Brad Snowder on March 1, 2014 at 11:39pm — 5 Comments

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