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About this website

SydWalker.Info is a personal website. I live in tropical Australia near Cairns. I oppose war, plutocracy, injustice, sectarian supremacism and apartheid. I support urgent action to achieve genuine sustainability and a fair and prosperous society for all. I rely upon - and support - free speech as defined in Article 19 of the Universal Declaration of Human Rights (see below).

with the dawg

"Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers"

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Unless otherwise indicated, material on this website is written by Syd Walker.

Anyone is welcome to re-publish material sourced from this site, as long as the source is acknowledged with a hyperlink.

Material from other sources reproduced here is presented on a 'Fair Use' basis. I try to cite references accurately. Please contact me if you have queries, comments, broken link reports, complaints - or just to say hello.

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A Close Encounter with our Galaxy
Jul 29th, 2009 by Syd Walker

Last November I blogged about a jaw-dropping image of the Milky Way by the American photographer Wally Pacholka – see Amazing. He’s developed a stunning way of photographing the night sky that gives a sense of three dimensionality.

According to his website, NASA has now published 34 of Mr Pacholka’s photographs in its Astronomy Picture of the Day series – more than any other photographer.

Today’s APOD – The Milky Way Over Devil’s Tower – is the latest. Devil’s Tower in Wyoming will be familiar to movie goers; it was the scenic backdrop for Stephen Speilberg’s Close Encounters of the Third Kind.

Devils Tower in Wyoming

The Milky Way Over Devil's Tower by Wally Pacholka

 

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The Artistry of Stellar Death
May 20th, 2009 by Syd Walker

A thousand parsecs hence, within our own galaxy and appearing in the constellation of Gemini, a spectacular event is in progress.

The Eskimo Nebula

The Eskimo Nebula

If mainstream astonomical theory is correct, when we look at the Eskimo Nebula we’re witnessing a late stage in the evolution of a star similar to our own sun. As it turns into a superdense white dwarf, the star ejects large amounts of gaseous matter into the surrounding space. The afterglow fades slowly.

This nebula was first catalogued in the late 18th century by the brilliant musician and astronomer William Herschel. Now, with photos from the Hubble telescope, we can observe it’s ghostly magnificence better than ever before.

Greedy, bellicose idiots, scrapping to snatch unfair portions of the spoils of mortal existence, would do well to bookmark NASA’s Astronomy Picture of the Day website and visit often.

We need to turn swords into ploughshares, missile-launchers into telescopes.

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Deimos
Mar 18th, 2009 by Syd Walker
Mystery Object

The smaller of the two moons of Mars

This photo of Deimos was featured recently on NASA’s Astronomy Picture of the Day website, which says: “Deimos is one of the smallest known moons in the Solar System measuring only about 15 kilometers across. The diminutive Martian moon was discovered in 1877″.

AbsoluteAstronomy.com explains: “In Greek mythology, Deimos was the personification of dread. He was the son of Ares and Aphrodite. He, his brother Phobos and the goddess Enyo accompanied Ares into battle, as well as his father’s attendants, Trembling, Fear, Dread and Panic. His Roman equivalent was Formido or Metus. Asaph Hall (a 19th century American astronomer), who discovered the moons of Mars, named one Deimos, and the other Phobos.”

A recent entry in the Planetary Society website has more:

Deimos is relatively poorly studied because all modern Mars spacecraft orbit at altitudes much lower than Deimos’ 20,000 kilometers. Since Deimos, like nearly every moon in the solar system (including our own), is tidally locked to its planet, that means that all orbiters see only one face of the moon, the “sub-Mars hemisphere,” and that at a great distance. Phobos orbits much closer to Mars (at 9,400 kilometers), which is still above the altitude of the circular, polar orbiters like Mars Global Surveyor, Odyssey, and Mars Reconnaissance Orbiter, but it’s below the apoapsis of Mars Express, and is now being well mapped from all sides.Deimos Map

Our Galaxy
Feb 17th, 2009 by Syd Walker
Our Galaxy

Our Galaxy

Two-Armed Spiral Milky Way: a CalTech artist’s illustration of our galaxy, portrayed from a view perpendicular to the galactic spirals.

Our sun is located just to the right above the Persius Arm.

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Amazing
Nov 29th, 2008 by Syd Walker

The best thing about our galaxy is that we’re inside it.

This is the most jaw-dropping photo of the Milky Way I’ve ever seen. Kudos to Wally Pacholka. It’s for sale HERE – along with other amazing space photos.

If anyone knows of a more awesome astronomical pic, please share it.

Milky Way.jpg

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