Search found 576 matches

by Qev
Thu Nov 06, 2008 7:27 pm
Forum: Starship Asterisk: Handbook
Topic: Resolved: Bugs? Problems?
Replies: 248
Views: 34829

Re: Bugs? Problems? Report them here!

I've followed the steps posted, and the problem still seems to be occurring. I've tried it using Firefox v3.0.3, and Internet Explorer v6.0.2900.2180 (yeah, I know, I'm out of date... :)); both show the same behaviour.
by Qev
Sun Nov 02, 2008 5:59 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: How fast can we go?
Replies: 352
Views: 79172

orin stepanek wrote:is there a movie called Flesh Gordon? Sounds kind of risque. :)
There is, and it is. It's also awful and absolutely hilarious. :lol:
by Qev
Wed Oct 22, 2008 6:03 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27501

Heh, it's kind of funny, I wasn't even trying to suggest that neutrinos make up dark matter. Rather, that they played a role similar to dark matter in the past, ie. a (then) unobserved particle that was proposed to account for observations of missing energy. I'd always thought that neutrinos were di...
by Qev
Sun Oct 19, 2008 7:46 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: How fast can we go?
Replies: 352
Views: 79172

Centrifugal force is not just like the Coriolis force a force experienced and noticeble in a rotating frame. The centrifugal force for an observer at rest is: Real: since the object (e.g. the moon) does not fall on the earth, the centrifugal force must be in equilibrium with the gravitational force...
by Qev
Fri Oct 10, 2008 7:45 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: ---- Memorizing the witness of two stars rotating each othe
Replies: 2
Views: 1083

Re: ---- Memorizing the witness of two stars rotating each

The Rules: read these before posting ... 1. All posts must be in English. No exceptions. I cannot read any other language well enough to moderate non-English posts. It appears to me that there's a lot of non-English between the English passages. Perhaps it says the same thing as the English. Perhap...
by Qev
Thu Oct 09, 2008 3:33 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Could Dark Matter Possibly Be . . .
Replies: 315
Views: 27501

When was the last time "non-baryonic particles" were needed to explain an observed phenomenon? Has any non-baryonic matter ever been observed else where in our universe? Just thought I'd point out, leptons, photons, W and Z bosons, and neutrinos are all non-baryonic matter. There doesn't ...
by Qev
Tue Oct 07, 2008 5:15 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Layers of Red Cliffs on Mars (APOD 06 Oct 2008)
Replies: 8
Views: 2999

They do have that image backwards, because it looks like the HiRISE page also has this particular image backwards. The text is correct for the full-scale image, here: http://hirise-pds.lpl.arizona.edu/PDS/EXTRAS/RDR/PSP/ORB_008200_008299/PSP_008244_2645/PSP_008244_2645_RED.abrowse.jpg The region sho...
by Qev
Sat Oct 04, 2008 4:56 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Punching out of wet paper bag, universal resources (03Oct08)
Replies: 6
Views: 2787

Here's a Wikipedia article that summarizes the possible fates of an expanding universe:

http://en.wikipedia.org/wiki/Future_of_ ... g_universe

I've always been fond of the term "Stelliferous Era". :)
by Qev
Wed Oct 01, 2008 7:51 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Hadron collider CERN
Replies: 209
Views: 18067

I think Henk meant to type 'slower', since 3e-90 seconds is six orders of magnitude longer than 3e-96 seconds. Ie. a more massive black hole evaporates more slowly.

Also, LHC webcams!

http://www.cyriak.co.uk/lhc/lhc-webcams.html

;)
by Qev
Thu Aug 14, 2008 4:01 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: NGC 6888 Crescent (Medusa?) Nebula (APOD 13 Aug 2008)
Replies: 15
Views: 6009

Re: NGC 6888: The Crescent Nebula - APOD 13 Aug 2008

Nevertheless your thoughts triggered a philosophical question. On earth, the moon, Venus, Mercury, Mars and the moons of the gas giants Silicon seems to the the abundant element. Si is one of the elements in the nuclear fusion chain of stars. Fe (Iron) is the last one. So there must be somewhat mor...
by Qev
Sun Jul 13, 2008 4:25 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: What's the opposite side of the sun? (APOD 11 Jul 2008)
Replies: 26
Views: 9367

the Long Bar going thru the galactic center has a sudden brightening of stars where it touches the spiral arms. You do realize that the illustration on which you base your interesting analysis is an "Artist's Concept", not a photograph. The bright areas to which you refer may not exist. h...
by Qev
Thu Jul 10, 2008 5:01 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

Actually, I think the situation you've just described was the foundation of the 'black hole information paradox', if I'm reading the wiki article right. :)
by Qev
Thu Jul 10, 2008 4:43 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

Hmmmmmm. Well then that only leaves the obvious- gravity. it seem to be the only logical force/wave that permeates the event horizon in either direction (directionless?) without questioning any laws or creating any serious breakdowns of physics. Actually, any of the forces would be able to 'permeat...
by Qev
Wed Jul 09, 2008 11:16 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

Ahhhh, I guess that clears up things then. The last step would probably (to the external observer) take an inordinately long time, though. I guess this rules out black holes being possible pathways to antigravity universes, since it really -would- lead to information loss. :lol:
by Qev
Wed Jul 09, 2008 7:37 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

Something that's bothered me recently about the black hole information paradox: why is it a paradox at all? Due to relativity, from the point of view of a distant observer nothing ever actually falls into a black hole in the first place, but rather objects approach asymptotically close to the event ...
by Qev
Tue Jul 08, 2008 7:58 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

Re: Quantity pairs

What hapens inside the event horizon, well, 20 years ago i read something about that, can't remember it exactly and now i'm trying (already a few weeks) to find the chapter in one of my books. Did not succeed yet. The GR explanation I always encounter, or at least an approximation of an explanation...
by Qev
Sun Jul 06, 2008 11:54 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

"Conservation of Information" is, I think, a consequence of quantum field theory, but I only have the most basic of layperson's understanding of anything quantum-mechanical. :lol: From what I can tell from reading various sources, Hawking radiation is an offshoot of the Unruh effect, but t...
by Qev
Sat Jul 05, 2008 5:24 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Three In One (APOD 05 Feb 2007)
Replies: 10
Views: 5419

There are motion-blurred people in the image, btw. You can see faint ghosting of them near the waterline.
by Qev
Fri Jul 04, 2008 9:55 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: SN 1006 Supernova Remnant (2008 Jul 04)
Replies: 34
Views: 11358

Re: APOD 2008 July 4 - SN 1006 Supernova Remnant

http://antwrp.gsfc.nasa.gov/apod/ap080704.html Well, this is a beauty isn't it. Looks like a cheerleader's pom-pom. Save the cheerleader.... :lol: Can anybody identify the white/yellow line that runs along the outer edge of this 'bubble' at top right? Is it just a thickening of matter that is highl...
by Qev
Mon Jun 30, 2008 6:15 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Triffid Nebula, flux capacitor? (APOD 30 Jun 2008)
Replies: 21
Views: 8301

Here's a closer view of the 'snail's head'. http://antwrp.gsfc.nasa.gov/apod/ap071226.html The shorter-looking stalk is a gas pillar, apparently with a new star forming at its tip, formed as the energetic light from the massive stars illuminating the nebula erode the gas clouds. The longer, thinner ...
by Qev
Mon Jun 30, 2008 12:43 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: feeding a black hole (APOD 27 Jun 2008)
Replies: 66
Views: 18085

I was always under the impression that GR gave a fairly decent description of what goes on inside an event horizon, as long as it stays away from the singularity itself (where those pesky infinities crop up)? I think the difference (again, in GR) between a universe and a black hole is that the unive...
by Qev
Thu Jun 26, 2008 8:08 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Not a Comet (APOD 26 Jun 2008)
Replies: 22
Views: 6917

Is it just me, or does it look like the stellar remnant is tracing out an hourglass shape in the nebula with a pair of polar jets, sweeping about as the star's poles precess?
by Qev
Tue Jun 24, 2008 5:10 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Star Streams of NGC 5907 (2008 Jun 19)
Replies: 63
Views: 17783

If I were in space, and hurled a spinnng gyroscope in such a way that I caused it to tumble as it flew, I make a guess that it's anybody's guess as to when it becomes "free falling". I don't think it quite works like that. You can't "set a gyroscope tumbling" without applying a ...
by Qev
Mon Jun 23, 2008 6:41 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Eta carinae & the Homunuculus Nebulae (APOD 17 Jun 2008)
Replies: 72
Views: 21338

Why were insects so large 100 million years ago? The paleontological record suggests that the oxygen content of the atmosphere was as high as 30% during some periods (instead of the 21% we have now), which would support much larger insects than we have today. Why does the Earth go through ice ages?...
by Qev
Mon Jun 23, 2008 6:18 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: The spiral in the bar in the spiral (APOD 22 Jun 2008)
Replies: 26
Views: 8935

http://hubblesite.org/newscenter/archive/releases/2005/01/image/a The relevant text from the page I suppose would be: "Only galaxies with large-scale bars appear to have these grand-design inner disks — a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and...