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What is the Difference Between the Redness of an Object and its Redshift?
Question: What is the difference between Doppler shift of light and Natural light spectra (blue for young and red…
Where is Voyager 1 Headed and When Will It Get There?
Question: The Voyager 1 spacecraft has left our solar system and is now in interstellar space but where exactly…
How Light Travel Time Affects What We See
Question: If the sun disappears it would take us 8 min. to realize it. How in the world, what…