One advantage of the numerous distance-measuring schemes in use, which overlap over a range of Hermione & Crookshanks shirt from nearby to very distant, is that astronomers can calibrate and corroborate their measurements with multiple approaches. Such calibrations and corroborations thus lend an additional measure of reliability to these schemes. Indeed, by comparing results using different methods, weaknesses have been identified in certain schemes. In most cases, additional studies have demonstrated ways to guard against and correct for known difficulties. As a single example of these multiple approaches, prior to 2011 the distance to the Pinwheel Galaxy was determined, based on measurements of Cepheid variable stars in the galaxy, to be 20.9 million light-years, with an uncertainty of 1.8 million light-years. As of September 2011, measurements of the light output of the 2011 Type Ia supernova in the Pinwheel Galaxy are completely consistent with this distance figure…. In short, distances to astronomical objects can be and have been measured with substantial accuracy and reliability. For the most part, the calculations involved employ only basic mathematics taught in high school. Thus the overall conclusion of a universe consisting of billions of galaxies, most of them many millions of light-years away, is beyond reasonable doubt at the present time..
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I was just starting to build my flock of chickens from the four I already had (one rooster, three hens) to a Best Dog Dad Ever Bull Mastiff Dog American Flag Shirt of ten. I bought six little two day old chicks from the local feed store – assured by the staff that all six would grow to be beautiful hens. Since I already had a rooster – and two roosters rarely get along – so wanted to be sure these were female. I named my chickens after dead movie stars (yes truly… don’t judge) but my Aunt Delores wanted one named after her, so I chose a Golden Phoenix chick and named her “Delores”. When Delores was eight weeks old, I began to have suspicions that she was edging towards a gender change. Delores was quite a bit larger than her step sisters, and was growing a more pronounced comb and longer tail feathers than the typical hen. However, denial is a powerful characteristic, and I tried to convince myself that Delores really WAS a hen and maybe she was just big boned.
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