Me out, see if any of my answers are right. i'm usually really good with astronomy, but right now it's just too much. i'm tired and stressed. i appreciate it, to anyone who . 1. what exactly is expanding the universe? a. distances separating the galaxy clusters b. (my answer) distances separating the planets in our solar system c. individual galaxy and galaxy clusters d. atoms, rocks, and planets 2. astronomers are able to measure changes in the rate of universe expansion by observing which of the following a. distant nebulae b. black holes c. (my answer) distant supernovae d. cosmic microwave background 3. the milky way is an example of what kind of galaxy? a. barred-spiral b. unbarred-spiral c. (my answer) elliptical d. s0 4. elliptical galaxies have no a. spiral arms b. central nucleus c. stellar density d. (my answer) interstellar gas 5. protogalactic clouds that have large amounts of angular momentum may develop into galaxies a. spiral b. irregular c. elliptical d. (my answer) irregular spiral 6. the of the galaxies prove(s) that the cosmos is not steady and unchanging. a. shape b. cluster c. (my answer) gravitational rotation d. recessional motions 7. which formation theory suggests that galaxies formed when massive protogalactic clouds fragmented into smaller gas clouds that then formed into individual galaxies? a. bottom-up b. top-up c. (my answer) lambda dark matter d. galaxy collision 8. astronomers’ ever-expanding knowledge of the universe has coincided with the development of a collection of indirect distance measurement techniques. a. (my answer) the cosmic distance scale b. the cosmic microwave background c. light echo distance d. differential galactic rotation 9. is used to determine distances between galaxies. a. (my answer) hubble’s law b. newton’s theory of relativity c. the cosmological redshift d. euclidean geometry 10. galaxies are characterized by a long stretch of stars that extends out beyond the galactic disk. a. elliptical b. barred-spiral c. irregular d. (my answer) spiral

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same bro same. its p*sses me offf

answer: following the publication of mysterium and with the blessing of the graz school inspectors, kepler began an ambitious program to extend and elaborate his work. he planned four additional books: one on the stationary aspects of the universe (the sun and the fixed stars); one on the planets and their motions; one on the physical nature of planets and the formation of geographical features (focused especially on earth); and one on the effects of the heavens on the earth, to include atmospheric optics, meteorology, and astrology.[24]

he also sought the opinions of many of the astronomers to whom he had sent mysterium, among them reimarus ursus (nicolaus reimers bär)—the imperial mathematician to rudolph ii and a bitter rival of tycho brahe. ursus did not reply directly, but republished kepler's flattering letter to pursue his priority dispute over (what is now called) the tychonic system with tycho. despite this black mark, tycho also began corresponding with kepler, starting with a harsh but legitimate critique of kepler's system; among a host of objections, tycho took issue with the use of inaccurate numerical data taken from copernicus. through their letters, tycho and kepler discussed a broad range of astronomical problems, dwelling on lunar phenomena and copernican theory (particularly its theological viability). but without the significantly more accurate data of tycho's observatory, kepler had no way to address many of these issues.[25]

instead, he turned his attention to chronology and "harmony," the numerological relationships among music, mathematics and the physical world, and their astrological consequences. by assuming the earth to possess a soul (a property he would later invoke to explain how the sun causes the motion of planets), he established a speculative system connecting astrological aspects and astronomical distances to weather and other earthly phenomena. by 1599, however, he again felt his work limited by the inaccuracy of available data—just as growing religious tension was also threatening his continued employment in graz. in december of that year, tycho invited kepler to visit him in prague; on january 1, 1600 (before he even received the invitation), kepler set off in the hopes that tycho's patronage could solve his philosophical problems as well as his social and financial one

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