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ASTRO: Distances can be deceiving -- answers
Galaxies
2: SDSS J105205.52+362836.3 magnitude 17.9 33 million light years 4: PGC 2081645 magnitude 17.1 Distance 563 million light years 5: SDSS J105133.55+363053.3 magnitude 17.9 570 million light years 6: SDSS J105141.30+363653.4 magnitude 16.1 570 million light years 1: SDSS J105243.56+362925.6 magnitude 17.9 1.676 billion light years 3: SDSS J105203.05+363205.0 magnitude 18.9 2.786 billion light years QSOs 8: CSO 295 magnitude 16.8 5.66 billion light years 7: SDSS J105158.68+364326.1 19.0 magnitude 7.321 billion light years 9: SDSS J105242.50+364335.7 19.3 magnitude 8.09 billion light years How many did you get right? Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
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ASTRO: Distances can be deceiving -- answers
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ASTRO: Distances can be deceiving -- answers
Nice idea Rick. I would have guessed that number 6 was the 33 mly galaxy.
Quite wrong. The great thing is that your image allows for a classification of even the smaller galaxies. Numbers 4 and 5 are clearly spiral galaxies, which means that they can't be dwarfs and should be at comparable distances. Number 2 doesn't have a spiral structure, so it was a candidate for a dwarf. Stefan "Rick Johnson" schrieb im Newsbeitrag om... Galaxies 2: SDSS J105205.52+362836.3 magnitude 17.9 33 million light years 4: PGC 2081645 magnitude 17.1 Distance 563 million light years 5: SDSS J105133.55+363053.3 magnitude 17.9 570 million light years 6: SDSS J105141.30+363653.4 magnitude 16.1 570 million light years 1: SDSS J105243.56+362925.6 magnitude 17.9 1.676 billion light years 3: SDSS J105203.05+363205.0 magnitude 18.9 2.786 billion light years QSOs 8: CSO 295 magnitude 16.8 5.66 billion light years 7: SDSS J105158.68+364326.1 19.0 magnitude 7.321 billion light years 9: SDSS J105242.50+364335.7 19.3 magnitude 8.09 billion light years How many did you get right? Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
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ASTRO: Distances can be deceiving -- answers
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