Question by mmmrty: What does the curvature of spacetime have to do with the Perihelion precession of Mercury?
The perihelion precession of Mercury was the first evidence to prove that general relativity is correct. According to Sir Arthur Stanley Eddington's 1919 expedition of Einstein's prediction for the deflection of light by the Sun during the total solar eclipse of 29 May 1919, it helped to concrete general relativity as true theory.
Help me! I can't understand it fully in relation with the theory of general relativity of Einstein and curvature of spacetime
Best answer:
Answer by Lola FBonobo is, unfortunately, confused, as are you. It has nothing whatsoever to do with the "apparent" position of Mercury near the sun, or with the Eddingtim 1919 expedition. The two of you are thinking of Eddington's images of *stars* near the sun, not Mercury, which are in slightly "wrong" positions in the sky because of the gravity of the Sun.
Mercury's orbit is observed to be *actually* non-Elliptical and to *actually* violate Kepler's Laws, and this fact had been known for a century before Einstein. It is also known that the gravitational perturbations of the other planets aren't sufficient to explain this. General Relativity, however, does explain it in a natural way.
Near the Sun, clocks run slower due to gravitational contraction (or, depending on how you measure it or look at it, there is more space near the sun than their would be if space weren't curved). So Mercury spends more time near the sun because (as observed from far away) its clocks are slower there or (as observed from Mercury) there is more space there to traverse than there ought to be. So Mercury spends more time near the sun than Kepler would predict, and its orbit precesses as a result. Presumably this also happens with the other planets too, but at a level too low to detect.
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There will be an annular eclipse of the sun visible throughout the Reno/Tahoe region on May 20th, 2012. According to Nevada Magazine the totality of the eclipse will last from 6:28 to 6:33 pm local time in the regions with the longest totality. Though a partial eclipse will be visible across the region, Reno, Lake Tahoe, and Pyramid Lake (Where the Symbiosis music festival will be taking place May 17-21) are all directly in the path of the moon's shadow where all of the sun except for a small ring of light will be totally obscured. For product links and more information about eclipse safety and eclipse photography visit: fabulouslaketahoe.blogspot.com SAFETY FIRST: Remember, it's never wise to stare into the sun without protection! Even during the totality of a solar eclipse the part of the sun that is visible still puts out enough light to damage your retina after a few minutes. You can protect yourself by buying an eclipse viewerr or set of eclipse glasses from Amazon.com or your local party supply store; if you have a set of welding goggles or a piece
Tuesday, February 12, 2013
What does the curvature of spacetime have to do with the Perihelion precession of Mercury?
How many eclipse have occured and will occuer in the united states?
Question by jackeline mendez: How many eclipse have occured and will occuer in the united states?
I want to know more about eclipses.A sun eclipse or moon as i've heard. and is it true that you can't look one straight in the eye?
Best answer:
Answer by BullseyeHere is a list of the last and NEXT total solar eclipses for many US cities. Read down this web page:
http://www.space.com/spacewatch/050408_solar_eclipse.html
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A total solar eclipse plunged northern Queensland into darkness for two minutes, delighting crowds packed on the beach in Cairns. Australians donned protective glasses as the clouds parted to allow them to witness one of nature's greatest phenomena -- a total eclipse of the sun. All eyes and cameras turned to the heavens over tropical north Queensland as the moon began moving between the Earth and the sun, like a small bite which gradually increases in size. Cloud cover threatened to spoil the party and huge cheers erupted when they parted to give tens of thousands of eclipse hunters a perfect view of totality -- when the moon completely covers the sun and a faint halo or corona appears. The path of the eclipse got under way shortly after daybreak when the moon's shadow, or umbra, fell in the Garig Gunak Barlu National Park in the Northern Territory, about 155 miles east of Darwin. The umbra then moved eastward before alighting in north Queensland -- one of the few places it could be viewed by humans and where tourists and scientists flocked to witness the region's first total solar eclipse in 1300 years. Read more: www.telegraph.co.uk Get the latest headlines www.telegraph.co.uk Subscribe to The Telegraph www.youtube.com Like us on Facebook www.facebook.com Follow us on Twitter twitter.com Follow us on Google+ plus.google.com Telegraph.co.uk and YouTube.com/TelegraphTV are websites of The Daily Telegraph, the UK's best-selling quality daily newspaper providing news and ...
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Q&A: What do they mean when you can see planets during a total solar eclipse?
Question by AY0116: What do they mean when you can see planets during a total solar eclipse?
There is a total eclipse coming up in August for parts of Russia and China, there are other places as well but I don't know where. I was reading an article about how there will be four planets visible during the eclipse. What I want to know is, does the eclipse magnify these planets so you can view them with the naked eye or does it just expose the area of the planet in darkness long enough that you could view them through a telescope?
Best answer:
Answer by Wild BillThe eclipse actually reduces the light pollution from the Sun to the Earth allowing us to see the brightest objects in the sky such as Venus, Jupiter, Mars, and Saturn. When the eclipse is over they will fade into the wild blue sky!
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The total solar eclipse and surrounding atmosphere of excitement.
Q&A: How are small images of the sun in partial eclipse,seen under the shades of tree during solar eclipse?
Question by Mahesh: How are small images of the sun in partial eclipse,seen under the shades of tree during solar eclipse?
Prior to the total solar eclipse, you may be able to look at the shadow thrown by a tree onto the ground. Often thousands of small images of the sun in partial eclipse will be visible. How does this happen? Does this phenomena have any thing to do with the term,'Fraunhoffer Diffraction?
Best answer:
Answer by Roger KDon't know if it is related to Fraunhoffer Diffraction, but each opening between the leaves through which the sun shines acts like a pinhole camera to project the image of the eclipsed sun on the ground.
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