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21st century astronomy
That amazing little satellite of Jupiter has always contributed a
wealth of information to heliocentric astronomy,the last being the astronomical adjustment known as the 'Mora Luminis' developed by Ole Roemer. With modern imaging such as HST ,anyone can appreciate how the orientation of Io and its shadow alters as the Earth orbital motion approaches and overtakes the slower orbital motion of Jupiter in our common orbits around the central star. http://antwrp.gsfc.nasa.gov/apod/ima...wc_hst_big.jpg http://antwrp.gsfc.nasa.gov/apod/ima...ow_hst_big.jpg The old conjunctions were great and from a different era but the new heliocentric astronomy is more detailed and exciting by taking the motions of the Earth into account rather than referencing distant objects to each other. |
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