bevin Posted April 24, 2007 Share Posted April 24, 2007 Let's face it, everybody likes a good blast that damages nothing important - and apparently God does too - because His fire-crackers are as far above ours as the stars are above the glow-worms... This thread of nuggets is simply to show some of biggest things God has made - although they are mostly so far away, we haven't had a chance to see them until the last few decades... /Bevin Quote Link to comment Share on other sites More sharing options...
bevin Posted April 24, 2007 Author Share Posted April 24, 2007 Not so far away, but hidden by the brightness of the sun, are the sunspots. http://homepage.ntlworld.com/robin.scagell/sunspots/pst_doublestack.htm Just how hot is the surface of the sun away? Quote Link to comment Share on other sites More sharing options...
David Koot Posted April 24, 2007 Share Posted April 24, 2007 It's been a few years, but as I recall, the surface of the sun is around 10,000 deg. F. It gets much hotter closer to the core. Quote Link to comment Share on other sites More sharing options...
bevin Posted April 25, 2007 Author Share Posted April 25, 2007 Good recall, David! http://solar-center.stanford.edu/compare/comparison.html Quote: Each square centimeter of the solar surface emits as much light as a 6000 Watt lamp. The temperature of the photosphere is about 5800 K. ... Water boils at about 373 degrees Kelvin, therefore, the surface of the Sun is about sixteen times hotter than boiling water. (5800K + 273) * 9/5 = about 11000 F Quote Link to comment Share on other sites More sharing options...
bevin Posted April 25, 2007 Author Share Posted April 25, 2007 The sun isn't exactly a placid place - here are some great time-lapse videos of its surface... http://sohowww.nascom.nasa.gov/data/realtime/mpeg/ /Bevin Quote Link to comment Share on other sites More sharing options...
Moderators Bravus Posted April 25, 2007 Moderators Share Posted April 25, 2007 Quote: (5800K + 273) * 9/5 = about 11000 F {pedantic git}(5800-273)* 9/5 + 32 = a touch under 10000 F{/pedantic git} (because K starts at absolute zero so you have to subtract 273 to get it to Celsius) still pretty warm, though Quote Truth is important Link to comment Share on other sites More sharing options...
bevin Posted April 26, 2007 Author Share Posted April 26, 2007 I'll use my favorite teacher-excuse "I put it in there on purpose to see if anyone noticed" Of course, that ain't true - but it sounds good! /Bevin Quote Link to comment Share on other sites More sharing options...
D. Allan Posted April 26, 2007 Share Posted April 26, 2007 Those time lapse movies of the sun are amazing; it looks like one bon-fire against another. Quote dAb O frabjous day! Callooh! Callay! Link to comment Share on other sites More sharing options...
bevin Posted April 26, 2007 Author Share Posted April 26, 2007 The temperature of the surface was estimated in the late 1700's by William Herschel - and he got it right to within 10% of so! It is a fascinating experiment. He simply timed a sheet of ice melting in the noon-day sun, imagined the sheet as part of a huge sphere the same thickness surrounding the sun, shrunk the sphere without changing its mass to sit on the sun's surface - so it was now a lot thicker, and used known physics to determine how hot the surface must be to melt that much ice that quickly! The surface erupts in huge flares, like these ones... http://sohowww.nascom.nasa.gov/hotshots/2003_11_04/ which throw material far into space - indeed way beyond the Earth's orbit... The Earth is, of course, quite a long way from the Sun - how far? /Bevin Quote Link to comment Share on other sites More sharing options...
D. Allan Posted April 26, 2007 Share Posted April 26, 2007 "Three light-minutes" seems to blaze up into my memory. ¿About 33.48 million miles? Quote dAb O frabjous day! Callooh! Callay! Link to comment Share on other sites More sharing options...
Moderators Bravus Posted April 26, 2007 Moderators Share Posted April 26, 2007 I think it's more like 8 light-minutes, from memory. Quote Truth is important Link to comment Share on other sites More sharing options...
Administrators Gail Posted April 26, 2007 Administrators Share Posted April 26, 2007 More than that from MY memory... You guys are so smart! Quote Isaiah 32:17 And the work of righteousness shall be peace; and the effect of righteousness quietness and assurance for ever. Link to comment Share on other sites More sharing options...
Moderators Bravus Posted April 26, 2007 Moderators Share Posted April 26, 2007 http://www.newton.dep.anl.gov/askasci/ast99/ast99431.htm Gail and I win... and maybe D got his 3 from the .3? Quote Truth is important Link to comment Share on other sites More sharing options...
David Koot Posted April 27, 2007 Share Posted April 27, 2007 "Three light-minutes" seems to blaze up into my memory. ¿About 33.48 million miles? Well, simple enough to confirm, I think: 1 light-minute = 11,160,000 miles. The distance earth-sun is 1 AU (92,955,807 miles ). Divide 1 AU by that, and you get 8.329 light-minutes. Dave Quote Link to comment Share on other sites More sharing options...
D. Allan Posted April 27, 2007 Share Posted April 27, 2007 If we were 5 light-minutes closer to the sun would we be broiled? Quote dAb O frabjous day! Callooh! Callay! Link to comment Share on other sites More sharing options...
David Koot Posted April 27, 2007 Share Posted April 27, 2007 Dabba, if we were ONE light-minute closer, things would get a warm (though not broiled, no doubt.) FIVE light-minutes closer would, indeed, make a huge difference in the temperature. Dave Quote Link to comment Share on other sites More sharing options...
bevin Posted April 27, 2007 Author Share Posted April 27, 2007 Some of the thrown material reaches Earth itself. It is travelling a lot slower than light, and it is electrically charged, so it gets pulled to the northern and southern magnetic poles where it causes... Aurora! http://www.weatherpaparazzi.com/Aurora.asp If you want to schedule a trip to see them for yourself... http://www.gedds.alaska.edu/AuroraForecast/ When did scientists first measure the distance to the sun and get a number right to within 25%, and how was it done? Quote Link to comment Share on other sites More sharing options...
D. Allan Posted April 27, 2007 Share Posted April 27, 2007 Didn't some Grecian do it about 2000 years ago by measuring shadows? Some triangulation was involved. This is very sketchy, in know! I will hazard a guess and say Euclid did it. Quote dAb O frabjous day! Callooh! Callay! Link to comment Share on other sites More sharing options...
bevin Posted April 27, 2007 Author Share Posted April 27, 2007 Well, Eratosthenes did this thing involving shadows, and decided the sun was a few thousand miles away - and then some bright spark realized that the Earth was a sphere, not a plane, and that they had got the radius of the earth, not the distance to the sun... http://outreach.as.utexas.edu/marykay/assignments/eratos1.html Try again... Quote Link to comment Share on other sites More sharing options...
bevin Posted April 29, 2007 Author Share Posted April 29, 2007 Earth isn't the only place to have aurora's - and charged particles from the sun aren't the only cause... http://antwrp.gsfc.nasa.gov/apod/ap961018.html Quote Link to comment Share on other sites More sharing options...
bevin Posted April 30, 2007 Author Share Posted April 30, 2007 Eventually those particles whizzing out from the sun get stopped by the particles of interstellar matter coming the other way - causing a shock wave as the two gases collide. Of course the stuff is so sparse there is nothing actually worth photographing, so NASA has to resort to computer generated pictures and artists impressions instead... http://antwrp.gsfc.nasa.gov/apod/ap020624.html /Bevin Quote Link to comment Share on other sites More sharing options...
Taylor Posted April 30, 2007 Share Posted April 30, 2007 Hey Bevin or anyone else. When we lived in NY I saw a huge meteor shower. It was amazing as we saw thousands in one night. (It was so spectacular that many many people were outside watching it) This may sound ilke a stupid question but if they are burning, and whizzing at that speed, are they just too far away to not hear? Or would there be no sound because they are in "space" or something? I.E. if I could be there at the same level as a "shooting star" and exist in that same enviornment would I hear any sound of them burning or whizzing past? (My astromony knowledge is very limited as you can tell, lol) Quote Link to comment Share on other sites More sharing options...
Amelia Posted April 30, 2007 Share Posted April 30, 2007 Anybody correct me if I am wrong but I believe we only hear sound in the troposphere. Most meteors skim through the thermosphere and exosphere. Quote <p><span style="color:#0000FF;"><span style="font-weight:bold;"><span style="font-style:italic;">"Do not use harmful words, but only helpful words, the kind that build up and provide what is needed, so that what you say will do good to those who hear you."</span></span> Eph 4:29</span><br><br><img src="http://banners.wunderground.com/weathersticker/gizmotimetemp_both/US/OR/Fairview.gif" alt="Fairview.gif"> Fairview Or</p> Link to comment Share on other sites More sharing options...
aldona Posted April 30, 2007 Share Posted April 30, 2007 Quote: Stars are God's Fireworks I believe that crop circles are God playing with His Spirograph. Wikipedia article (Spirograph) (for those who weren't lucky enough to have one of these wonderful toys as a child) aldona Quote www.asrc.org.au (Asylum Seeker Resource Centre, Melbourne)Helping over 2000 refugees & asylum seekers each monthIMSLP/Petrucci Music LibraryThe Public Domain Music Score Library - Free Sheet Music DownloadsLooking for classical sheet music? Try IMSLP first! Link to comment Share on other sites More sharing options...
Administrators Gail Posted April 30, 2007 Administrators Share Posted April 30, 2007 I had a Spirograph! Loved that thing! :) Quote Isaiah 32:17 And the work of righteousness shall be peace; and the effect of righteousness quietness and assurance for ever. Link to comment Share on other sites More sharing options...
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