Saturday Night Science: Orbits in Strongly Curved Spacetime

!RAWBLOCK0!     Click the title of this post to see the interactive simulation.

Introduction

The display above shows, from three different physical perspectives, the orbit of a low-mass test particle, the small red circle, around a non-rotating black hole (represented by a grey circle in the panel at the right), where the radius of the circle is the black hole’s gravitational radius, or event horizon. Kepler’s laws of planetary motion, grounded in Newton’s theory of gravity, state that the orbit of a test particle around a massive object is an ellipse with one focus at the centre of the massive object. But when gravitational fields are strong, as is the case for collapsed objects like neutron stars and black holes, Newton’s theory is inaccurate; calculations must be done using Einstein’s theory of General Relativity.... [Read More]


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TOTD 2018-05-04: Why Gold?

I often hear of people talking about the joys of returning to a gold standard.  Why is gold the choice people fix on?

Now, currency is based on its ability to be exchanged for something.  Right now, the US dollar is valuable for being able to pay debts to the US Government.  Even if everyone else refused to accept US currency, you could still pay your taxes in US greenbacks.  This is what gives it value – ability to command labor.  (This is why I have been skeptical of BitCoin etc.  There is a significant chance that BitCoin could end up without any possibility of exchange.  There is nothing backing these cryptocurrencies.)... [Read More]


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Attacks on Trump Supporters continues and is clearly insane

https://www.nationalreview.com/corner/donald-trump-evangelical-supporters-stormy-daniels/

I do not understand Never Trump. What do they hope to accomplish with attacks on Trump supporters. I get they hate Trump, but they cannot win back a party with attacking Trump voters. It does not add up.... [Read More]

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Experimental Feature: Visual Editing of Comments

I have just enabled local modifications to permit visual (“rich text”) editing of comments on posts.  Since 2018-02-15 users have been able to edit their own comments on posts.  However, editing was always with the “Quicktags” editor, in which the user edits the HTML code of the comment, not the visual presentation used by default when composing a comment (using the “TinyMCE” editor).

The change makes the TinyMCE visual editor available, and the default, when editing comments.  The Quicktags editor remains available for those who prefer it, or when editing the comment at the HTML level is the only way to accomplish what you’re trying to do (for example, custom styles, fonts, colours, etc.).  The “Add Media” button is available when in Visual mode, making it easy to add new images while editing comments.  Shortcodes, such as those for spoilers, mathematics, and drop capitals, may be used in either Visual or Text mode editing.... [Read More]

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Pure entertainment!

My Film Group enjoyed the choice of this week. The music was light-hearted and with a good beat, and had us moving along with it. We were all agreed that Kevin Spacey (58) is talented. The singing and dancing were professional, and obviously the result of natural ability and his good training at the New York’s Juilliard School. Thanks to Eileen for lending us this DVD!

[caption id="attachment_6211" align="alignright" width="219"]Bobby Darin 1959[/caption]

Beyond the Sea (2004) is an American musical drama film based on the life of Bobby Darin (1936-73). The name is from one of his most popular songs. Kevin Spacey co-wrote, directed, and co-produced the film. He also sang, danced, and starred as Bobby Darin. Kevin Spacey was so keen to make this film because it reminded him of his mother. Apparently, his mother loved the music of Bobby Darin and played it all the time. Stacey also admired the courage of Bobby Darin, who had rheumatic fever in his childhood, which he knew had shortened his life. Instead of wallowing in self-pity, he lived fully and did so much before he died at age 37. People still remember his rendering of Kurt Weill’s Mack the Knife.... [Read More]


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Porny Daniels Doesn’t Know How Good She Has It

Remember “bimbo eruption”?   Although coined by a woman, Clinton’s  strategist Betsy Wright,  it is a disgusting phrase, always made me think of an elephant fart.  But it was brilliant, discrediting not only the women in Bill’s past who had already surfaced but, in advance, any other who might pop up.  Bimbo, Dumbo, Bozo….the lady is a clown! Cue the laugh track.

Why  the F can’t we call Porny Daniels a “bimbo”?... [Read More]


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