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George Dishman wrote;
http://www.dishman.me.uk/George/SolarDay/index.htm The only way for the rotation to be 360 degrees in 24 hours would be if you stopped the Earth in its orbit. ... snip I suppose I should be suitably insulted No, you shouldn't. You are simply supposed to look at the web page and either agree or tell me what is wrong with it. Writing lots of paragraphs that do not address our differences doesn't move the conversation forward and is as much a waste of your time as mine. Why do you insult me with graphics and subhuman explanations like those,if there was the slightest trace of an astronomer in any of you you would laugh them out of existence yet I am supposed to correct this garbage as though it meant something.If you want to be treated like children then so be it. Axial tilt and the Equation of Time. Axial tilt is a property of equatorial orientation to the Sun,a sundial registers this as an increase or decrease in the lenght of the shadow cast over the course of an annual elliptical rotation,it does not affect the pace of the shadow across the sundial or subsequently the variation from natural noon to natural noon.As the Equation of Time applies from North polar axis to South polar axis along any given line of longitude the variation in natural noon to natural noon does not refer to the asymmetry between daylight and darkness but simply the variation in the pace of the Sun from when the Earth faces the Sun directly (noon) to when it repeats it. Axial rotation and the variation within elliptical rotation. The earth rotates on it's axis,it also rotates around the Sun,this is what dictates the variation in natural noon to natural noon,because of the unbounded silliness of you and your colleagues I have to repeat that natural noon to natural noon is when the Earth faces the Sun directly and the variation is caused by the cylical increase and decrease in distance covered by the Earth within its annual elliptical orbit,this variation is known as Kepler's second Law. The wisdom of my astronomical heritage in contrast to the utter stupidity of what passes for it today is to recognise that there is no consistent external motion by which we register the constant rotation of the Earth through 360 degrees in 24 hours.What this means is that the Equation of Time corrects the variation in natural noon to natural noon to constant axial rotation where the longitudinal coordinates rotate with the Earth and determine artificial noon registered by clocks where every 15 degrees demarcates a hour difference totalling 24 hours and 360 degrees simultaneously. There is no 1 degree difference over a cycle for the variation of axial rotation against the variation in elliptical rotation from natural noon to natural noon and the rotations of the Earth cannot generate such an effect.If you believe that there is a constant 1 degree displacement (which is your priviledge) I can only assume that it is for the benefit of retaining a 'celestial pole',an archaic notion that presents an obstacle to discerning the changing orientation of the local stars to the remaining galaxies via a rotational axis which we cannot discern directly. The original question that generated this thread was how to recognise galactic rotation,you simply want to remain in a sidereal world and I'm sure you and your colleagues will be more than happy to remain in your bubble universe with your 'celestial pole'. Axial rotation and sidereal motion. The parameter for sidereal motion combines axial and elliptical rotations into a combined rotation as represented partially by your graphics,you are obliged to demonstrate how the local stars act as a rotational reference but it is impossible to achieve,you cannot represent the variation of a noon to noon cycle because no such 1 degree difference can be accomplished,in short,the sidereal parameter only works by creating to false parameters by adopting geocentric observations and determining that the motion of the Sun against the 'celestial pole ' is real.There is no such thing as a celestial pole,this is a property of the axial rotation of the Earth,the sidereal parameter bypasses the next natural rotation which is the Earth's orbital rotation and by these means there will be no further discussion on modelling the wider cosmos off the galactic axis for in your love of the sidereal parameter you are intent in retaining the celestial pole. Good for you George,how great you must feel ignoring the implications of the Hubble discovery in 1923 which should have shut this relativistic epoch down,now there is not a trace of any person capable of understanding the two rotations of the Earth,how the Equation of Time marked the difference of these two rotations,why axial tilt does not affect the variation from natural noon to natural noon and this is even before you describe celestial motion outside the solar system. Since the errors you make regarding supernovae originate with this orbital aspect, there is no point moving on until you sort it out. If you got an astronomy lesson from Flamsteed,Copernicus,Kepler and especially Roemer you would have appreceated just how difficult their task was,insofar as the changing orientation of the local stars to the remaining galaxies is so fundamental as to be incontrovertible yet you have'nt the foggiest idea how to treat it and go out of your way to retain the sidereal 'celestial pole' says something about the silliness of this generation of intellectual freaks ever to inhabit the planet. snip rest - again not relevant to the questions George I looked at your other posts and you have returned to relativistic thumbsucking,I see you try to make sense of the cmbr but it is such a waste of data in your hands,trying to make sense of cosmological observations while ignoring the changing orientation of galaxies to each other via local rotation looks for all the world like incompetence,I probably would take the time to explain why but as contemporary minds can't even handle the local rotation of the Earth wrt the Sun I am at least thankful that while I am starved for conversation on the issue of galactic rotation,the complex issues would never breed such nonsense as the pathetic aether/relativity arguments. |
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Gerald Kelleher wrote:
If anything good comes from this thread,it will probably be recognising that the major institutions make the fundamental error of incorporating axial tilt or equatorial orientation as a factor in the Equation of Time In that case, show us the error in the graph you linked to: http://sundials.org/faq/eotgraph.gif And what the correct graph would be. -- Jeff, in Minneapolis .. |
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![]() "Oriel36" wrote in message om... George Dishman wrote; http://www.dishman.me.uk/George/SolarDay/index.htm The only way for the rotation to be 360 degrees in 24 hours would be if you stopped the Earth in its orbit. ... snip I suppose I should be suitably insulted No, you shouldn't. You are simply supposed to look at the web page and either agree or tell me what is wrong with it. Writing lots of paragraphs that do not address our differences doesn't move the conversation forward and is as much a waste of your time as mine. Why do you insult me with graphics and subhuman explanations like those, Because I tried asking questions at a higher level but you refused to even answer: http://www.starsforfun.com/gaot01a.jpg The stars appear to rotate about the celestial pole, turning through 360 degrees in (to the nearest second): [a] 24 hours exactly [b] 23 hours, 56 minutes, 4 seconds [c] 24 hours on average but varying during the year [d] 365.2422 days of 86400 seconds each [e] something else (state your value) _____________ The chevrons show how often I tried treating you as an adult but you still insist on behaving like a petulant child. Any normal person would simply have answered when I first asked. Now I have gone to the trouble of drawing some trivial sketches that give you the opportunity to address the subject without backing down from your position and it seems to have had the desired effect. Later on you say: If you believe that there is a constant 1 degree displacement (which is your priviledge) I can only assume that it is for the benefit of retaining a 'celestial pole' ... No, it is purely a consequence of Copernicus. If the Earth goes round the Sun in 365 days, it moves round the Sun by 360/365 degrees per day. That's all there is to it. This is what has been at the bottom of all the disagreements we have had recently and is why I went to the trouble of drawing the web page. The 'celestial pole' refers to the axis of rotation as you said, not the orbital motion. The wisdom of my astronomical heritage in contrast to the utter stupidity of what passes for it today is to recognise ... the constant rotation of the Earth through 360 degrees in 24 hours. Since the Earth orbits around the Sun by 1 degree per day, the web page shows why the time taken for a rotation of 360 degrees and the time from noon to noon cannot be the same. The time from noon to noon is 24 hours as we agree, so the time for a rotation of 360 degrees logically cannot be 24h, it has to be less. None of the rest of your post relates to this topic but I will just point out a couple of things: The earth rotates on it's axis,it also rotates around the Sun,this is what dictates the variation in natural noon to natural noon, That is why the third diagram on the web page says that "after 24h (on average), it is again noon" when the Earth has turned "to again face the Sun". because of the unbounded silliness of you and your colleagues I have to repeat that natural noon to natural noon is when the Earth faces the Sun directly No, because you are so arrogant and don't bother to read what anyone else writes, you continue to repeat things that everyone else has already said. You quoted 20 lines of my post and then wrote over 110 lines of new text of which the first 7 quoted above are actually relevant. George |
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"George Dishman" wrote in message ...
"Oriel36" wrote in message om... George Dishman wrote; http://www.dishman.me.uk/George/SolarDay/index.htm The only way for the rotation to be 360 degrees in 24 hours would be if you stopped the Earth in its orbit. ... snip I suppose I should be suitably insulted No, you shouldn't. You are simply supposed to look at the web page and either agree or tell me what is wrong with it. Writing lots of paragraphs that do not address our differences doesn't move the conversation forward and is as much a waste of your time as mine. Why do you insult me with graphics and subhuman explanations like those, Because I tried asking questions at a higher level but you refused to even answer: http://www.starsforfun.com/gaot01a.jpg The stars appear to rotate about the celestial pole, turning through 360 degrees in (to the nearest second): [a] 24 hours exactly [b] 23 hours, 56 minutes, 4 seconds [c] 24 hours on average but varying during the year [d] 365.2422 days of 86400 seconds each [e] something else (state your value) _____________ The chevrons show how often I tried treating you as an adult but you still insist on behaving like a petulant child. Any normal person would simply have answered when I first asked. Now I have gone to the trouble of drawing some trivial sketches that give you the opportunity to address the subject without backing down from your position and it seems to have had the desired effect. Later on you say: If you believe that there is a constant 1 degree displacement (which is your priviledge) I can only assume that it is for the benefit of retaining a 'celestial pole' ... No, it is purely a consequence of Copernicus. If the Earth goes round the Sun in 365 days, it moves round the Sun by 360/365 degrees per day. That's all there is to it. This is what has been at the bottom of all the disagreements we have had recently and is why I went to the trouble of drawing the web page. The 'celestial pole' refers to the axis of rotation as you said, not the orbital motion. I'm sure even Jeff would burst out laughing when he sees how the author of spacetime tethers the orbits of the primary planets to sidereal motion or in other words;the geocentric celestial pole and then asks his readers to ignore sidereal motion in order to isolate the motion of Mercury,too funny !,he simply made up astronomy as he went along and I am sure if he said the moon was made of cheese,today you would be discussing whether it was swiss or provalone. "We must draw attention here to one of these deviations. According to Newton's theory, a planet moves round the sun in an ellipse, which would permanently maintain its position with respect to the fixed stars, if we could disregard the motion of the fixed stars, themselves and the action of the other planets under consideration. Thus, if we correct the observed motion of the planets for these two influences, and if Newton's theory be strictly correct, we ought to obtain for the orbit of the planet an ellipse, which is fixed with reference to the fixed stars." http://www.bartleby.com/173/29.html Good grief !!!!!. The wisdom of my astronomical heritage in contrast to the utter stupidity of what passes for it today is to recognise ... the constant rotation of the Earth through 360 degrees in 24 hours. Since the Earth orbits around the Sun by 1 degree per day, the web page shows why the time taken for a rotation of 360 degrees and the time from noon to noon cannot be the same. The time from noon to noon is 24 hours as we agree, What is this insincere nonsense ?,maybe I should say that we both agree that there is a variation in natural noon to natural noon (which there is !) due to the dual rotations of the Earth.You are lapsing back into insincerity and against that even I can't save the correspondence,perhaps because I see so much insincerity imposed on the truly great astronomers that you are only doing what is in your nature,great politics but poor astronomy. so the time for a rotation of 360 degrees logically cannot be 24h, it has to be less. None of the rest of your post relates to this topic but I will just point out a couple of things: The earth rotates on it's axis,it also rotates around the Sun,this is what dictates the variation in natural noon to natural noon, That is why the third diagram on the web page says that "after 24h (on average), it is again noon" when the Earth has turned "to again face the Sun". What is this average nonsense,the precision of axial longitude coordinates can be expressed by clocks,they are fixed geometrically to the planet and you can convert location coordinates into clock coordinates and visa versa.You cannot have your childish 4th dimension derived from clocks because clocks are rulers of physical distance and measure this distance in a specific way away from the polar axis. There are too many ditherers around clocks and from my experience it is rare to find an individual who sees the problems of clocks,geometry and astronomy,even large institutions and their 'experts' are oblivious to basic principles and should you imagine that I am isolated in my views you are very much mistaken. http://www.compulink.co.uk/~dominict...navigation.htm because of the unbounded silliness of you and your colleagues I have to repeat that natural noon to natural noon is when the Earth faces the Sun directly No, because you are so arrogant and don't bother to read what anyone else writes, you continue to repeat things that everyone else has already said. You quoted 20 lines of my post and then wrote over 110 lines of new text of which the first 7 quoted above are actually relevant. George Keep your celestial pole and your sidereal motion,frankly it is far worse than those who opposed the introduction of the heliocentric system.I can only appeal to the obvious true motion of the local stars to the remaining galaxies for so long and how we perceived local Milky Way rotation as an extension of the first two rotations of the Earth.Your relativistic cosmological model is a bubble universe designed around the 'celestial pole' and it is no wonder you resort to 'balloon' analogies to describe the universe,you are not capable of either feeling remorse for the destruction of astronomy or feeling embarrased that theorists foist the absurd 'every point is the valid center of the cosmos' as though it were a human achievement.I am embarrased for this epoch of humanity in contrast to the admiration for those great insights we inherited from the past by people who knew how to interpret celestial observation correctly. |
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Gerald Kelleher replied to Jeff Root:
If anything good comes from this thread,it will probably be recognising that the major institutions make the fundamental error of incorporating axial tilt or equatorial orientation as a factor in the Equation of Time In that case, show us the error in the graph you linked to: http://sundials.org/faq/eotgraph.gif And what the correct graph would be. The graph is fine,axial tilt as a component factor is not. The page that the graph is on says the graph shows the effects of Earth's axial tilt and the ellipticity of Earth's orbit. If the graph showed only the effect due to the ellipticity of Earth's orbit, it would have only one peak and one valley. This page has a graph which shows the two components of the equation of time: http://www.analemma.com/Pages/Summat...Summation.html The component due to the ellipticity of Earth's orbit causes the time that the Sun crosses the meridian to vary by almost +/- 8 minutes over the course of a year, while the component due to the tilt of Earth's axis with respect to the Sun causes the time that the Sun crosses the meridian to vary by about +/- 10 minutes over the course of half a year. The result of combining them is two unequal peaks and two unequal valleys in the equation of time, as shown in the graph you linked to: http://sundials.org/faq/eotgraph.gif How do you explain the fact that it has two unequal peaks and two unequal valleys? -- Jeff, in Minneapolis .. |
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![]() "Oriel36" wrote in message om... "George Dishman" wrote in message ... "Oriel36" wrote in message om... If you believe that there is a constant 1 degree displacement (which is your priviledge) I can only assume that it is for the benefit of retaining a 'celestial pole' ... No, it is purely a consequence of Copernicus. If the Earth goes round the Sun in 365 days, it moves round the Sun by 360/365 degrees per day. That's all there is to it. This is what has been at the bottom of all the disagreements we have had recently and is why I went to the trouble of drawing the web page. Gerald, I carefully read all the rest of your post and there isn't a single word that addresses the actual topic. Please respond to what I wrote. George http://www.dishman.me.uk/George/SolarDay/index.htm |
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(Jeff Root) wrote in message . com...
Gerald Kelleher replied to Jeff Root: If anything good comes from this thread,it will probably be recognising that the major institutions make the fundamental error of incorporating axial tilt or equatorial orientation as a factor in the Equation of Time In that case, show us the error in the graph you linked to: http://sundials.org/faq/eotgraph.gif And what the correct graph would be. The graph is fine,axial tilt as a component factor is not. The page that the graph is on says the graph shows the effects of Earth's axial tilt and the ellipticity of Earth's orbit. One particular point among many brought up in the discussion over the last number of weeks is that the major institutions inserted an axial orientation component into the Equation of Time and this is a major error.I quite understand why this error was introduced but as it is an error which affects all ahead of it,it is necessary to go through the particulars slowly and impartially. How important is all this ?,as location coordinates translate into clock readings the only permissible clock comparisons and the difference between readings are those which have existed for centuries,clocks are rulers of physical distance in a specific way away from the axis of rotation of the planet therefore it is no longer possible to seperate clocks and rulers which in turn dispenses with concepts based on rulers measuring one thing and clocks measuring another. If the graph showed only the effect due to the ellipticity of Earth's orbit, it would have only one peak and one valley. It is possible to draw attention to the most obvious error of the axial tilt component in the Equation of Time in any website you may care to present regardless of the pedigree of the institution.For example - "This chart shows the position of the true sun in the sky throughout the year. The y–axis on the chart represents the declination of the sun in the sky for one year, going from –23.45° in the winter to +23.45° in the summer. The x–axis represents the difference in time from what your watch reads to the actual position of the sun in the sky" http://www.analemma.com/Pages/Summat...Summation.html As the Earth rotates to face the Sun directly (noon) along any given line of longitude from the North polar axis to the South polar axis it should strike you as odd that all websites use the hemispherical terms of winter and summer which are reversed to each other in both hemispheres,if it is summer in America it is winter in Australia. As always it is most unfortunate that I have to explain where the error of axial tilt as a component of the Equation of Time is generated,you can safely skip it as I do not expect that you will recognise where the winter/summer component makes the whole thing go awry insofar as the Equation of Time is an equation which ignores the asymmetry between daylight and darkness due to axial tilt and refers solely to the variation in the observed pace of the Sun from natural noon to natural noon by means of the dual rotations of the Earth over the course of an annual orbit.Axial tilt will shorten and lenghten the shadow cast on a sundial over the course of an annual orbit but it does not affect the pace of the shadow across the sundial,again the pace is common from pole to pole so differences between winter and summer does not apply and subsequently it is not a factor in the Equation of Time. The basis of the Equation of time refers only to the motion of the Earth wrt the Sun,unlike the sidereal parameter it does not create an artificial 'celestial pole' which after all is a property of the axial rotation of the Earth generating circumpolar motion.The sidereal parameter combines the axial and elliptical rotation and determines a planetary constant motion of 23 hrs 56 min approx but left as it stands this creates a conflict with the clock system defined geometrically by the longitudinal system designed around 24 hrs per 360 degrees.The inequality from natural noon to natural noon occurs from pole to pole as the Earth rotates through an axial cycle (when it faces the Sun directly at one location to when it repeats it),it does not matter how much you tilt the Earth,as rotation is constant the Equation of Time and the axial cycle do not depend on axial orientation no more than any spinning object and an outside reference point does.As an analogy,tilt a constantly spinning carousel and it does not affect the observed appearance of an outside stationary reference point from one cycle to the next,if this is beyond you I suggest that you stay clear of the next part. The astronomers in Newton's era and Newton himself noted that there is no constant external motion by which you can guage 24 hrs per 360 degrees.As clocks are fixed to longitude coordinates which rotate with the planet the Equation of Time denotes the variation against these rotational axial coordinates,in other words the variation from natural noon to natural noon never requires an external reference for axial rotation because the reference is built into the geometry of the planet,the only thing necessary was the natural cyclical variation in distance through elliptical rotation against axial rotation. For whatever reasons,it is a poor intellectual judgement to associate daylight/darkness asymmetry to the Equation of Time merely from the fact that it can't be done,is counterproductive,really bad mechanics by attributing influence to equatorial orientation along with axial rotation and what have you. This page has a graph which shows the two components of the equation of time: http://www.analemma.com/Pages/Summat...Summation.html Natural noon to natural noon is when the Earth rotates axially to face the Sun directly (noon),this axial rotation does not correspond to any external reference of a constant 24 hrs per 360 degrees yet astronomers and navigators corrected the appearance of natural noon to their axial coordinates of 360 degrees in 24 hours,astronomers for their purpose and navigators for theirs but the common usuage is the Equation of Time.As navigators were required to know what distance they were removed from the axis of the Earth (Latitude) so as to know what distance they needed to apply to seconds,minutes and hours ( 1 degree/4 minutes equals 69 miles at the equator and 0 at the poles) and then make the comparison with an onboard clock for determination of their location on the planet,the seperate computation for latitude relied on their tilt off the polar axis so scrambling this with equatorial orientation and then attributing significance to equatorial tilt as a component of the Equation of Time is almost bewidering as it is ignorant (no offense intended). http://www.lewis-clark.org/mapterrincog/nav_mtiG14.htm http://www.starpathdemos.com/bowditch/table7.htm The component due to the ellipticity of Earth's orbit causes the time that the Sun crosses the meridian to vary by almost +/- 8 minutes over the course of a year, while the component due to the tilt of Earth's axis with respect to the Sun causes the time that the Sun crosses the meridian to vary by about +/- 10 minutes over the course of half a year. The result of combining them is two unequal peaks and two unequal valleys in the equation of time, as shown in the graph you linked to: http://sundials.org/faq/eotgraph.gif How do you explain the fact that it has two unequal peaks and two unequal valleys? -- Jeff, in Minneapolis With all due respect but all these websites talk of summer and winter as a component in the Equation of Time whereas the original framework for the astronomical correction was never conditioned by hemispherical differences.The Equation itself allows for the natural variation from noon to noon as a consequence of the dual rotations of the Earth but attributes significance to the axial coordinates of longitude and clocks as 24 hours per 360 degrees as a constant.If for some reason you wish to retain daylight/darkness asymmetery as a component of the Equation of Time for the purpose of retaining the limited sidereal parameter,you are effectively killing off the chance of removing the antiquated 'celestial pole' for the purpose of wider cosmological modelling off the galactic axis or what amounts to the same thing,the changing orientation of the local stars to the remaining galaxies. . |
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"George Dishman" wrote in message ...
"Oriel36" wrote in message om... "George Dishman" wrote in message ... "Oriel36" wrote in message om... If you believe that there is a constant 1 degree displacement (which is your priviledge) I can only assume that it is for the benefit of retaining a 'celestial pole' ... No, it is purely a consequence of Copernicus. If the Earth goes round the Sun in 365 days, it moves round the Sun by 360/365 degrees per day. That's all there is to it. This is what has been at the bottom of all the disagreements we have had recently and is why I went to the trouble of drawing the web page. Gerald, I carefully read all the rest of your post and there isn't a single word that addresses the actual topic. Please respond to what I wrote. George http://www.dishman.me.uk/George/SolarDay/index.htm Take a look at what is going around us George,tell me what astronomy you see in this forum.Would you care to explain to Henri how axial tilt is a factor in the determination of finite light distance seeing that Ole Roemer applied the Equation of Time to his observance of the orbit of Io,spare me your answer for if the big institutions are going along with axial tilt as a factor, the Equation of Time suffers death by bad consensus just as the Equation of Light has. http://dibinst.mit.edu/BURNDY/Online.../chapter3.html Your graphics represent the creation of a celestial pole through which you can retain sidereal motion or the motion of the 'fixed stars',it is your priviledge to acknowledge circumpolar motion without recognising the changing orientation of the local stars to the remaining galaxies but like those before you centuries ago who could not recognise the reasoning behind heliocentricity I must leave you with your antequated notions. There are only two rotations involved,count them,just two rotations involved in the Equation of Time and you lot can't even handle those,insofar as sci.research forums are even worse than the unmoderated forums the dismal prospect is that the scientific discipline will never recover and as much as it must make you content to continue on with circular aether/relativity arguments I would take pride in isolation rather than the consensual mediocrity you adhere to,the worse condition a human being can live by. |
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![]() "Oriel36" wrote in message om... "George Dishman" wrote in message ... "Oriel36" wrote in message om... "George Dishman" wrote in message ... "Oriel36" wrote in message om... If you believe that there is a constant 1 degree displacement (which is your priviledge) I can only assume that it is for the benefit of retaining a 'celestial pole' ... No, it is purely a consequence of Copernicus. If the Earth goes round the Sun in 365 days, it moves round the Sun by 360/365 degrees per day. That's all there is to it. This is what has been at the bottom of all the disagreements we have had recently and is why I went to the trouble of drawing the web page. Gerald, I carefully read all the rest of your post and there isn't a single word that addresses the actual topic. Please respond to what I wrote. George http://www.dishman.me.uk/George/SolarDay/index.htm Your graphics represent the creation of a celestial pole .. Rubbish, you are hallucinating. The diagram is stripped to the basics and shows _only_ the Earth moving round the Sun, just pure Copernicus, nothing more. There are only two rotations involved,count them,just two rotations .. Correct and the diagrams show nothing but those two. Now try to address the point instead of inventing non-existent distractions: if the Earth completes one orbit around the Sun in a little more than 365 days, it moves round the Sun a little less than one degree per day, true or false? George |
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