Most galaxies are spirals. While galaxies often collide, their stars rarely do.
ID: 235231 • Letter: M
Question
Most galaxies are spirals. While galaxies often collide, their stars rarely do. The Milky Way is smaller than most members of the Local Group. The closest other galaxy to our solar system is the Sagittarius Dwarf. In Hubble's "tuning fork", SO lies between E7 and Sa. The most tightly wound spiral arms belong to Hubble's type Sc. Radio galaxies emit large amounts of energy from regions much larger in size than the visible galaxy. Radio galaxies emit only radio waves, and are not otherwise observable. Astronomers began to understand quasar spectra when it was discovered that their radiation is redshifted by an unexpectedly large amount. When observing a quasar, we are probably looking at a stage our own Galaxy passes through billions of years ago. Quasars typically are energetic for only a few million years before turning into more normal galactic nuclei. may be the "missing link" between quasars and normal spiral galaxies. Many nearby normal galaxies may become active in the future. On the largest scales, galaxies in the universe appear to be arranged on huge sheets surrounding nearly empty voids. The image of a distant quasar can be split into several images by the gravitational field of a foreground object. More than 90% of matter in the universe is dark. The expansion of the universe means the stars in our Milky Way are getting farther apart with time. Our theories of galaxy formation are just as well developed and tested as are our theories of star and planet formation.Explanation / Answer
answer 1- true that the most galaxies are spiral shaped. spiral galaxies are most familar in Universe. Other shaped of galaxies are irregular shaped, elliptical, lenticular, oval. many galaxies are like disk shaped barred - spiral shaped like our galaxies Milky way.
answer 2- true. that when the two galaxies colloides. it is smash of two galaxies star do not collide. they spread out.
answer 3- false . that the milky way galaxy is smaller galaxy than the other galaxy of local group. other galaxies are dwarf galaxies. Milky way is the second largest galaxy of the local group.
answer 4- false. the closest galaxies to our solar system is Sagittarus dwarf. Sagittarus dwarf is 50000 ligh years from the core of the milky way galaxy. the nearest galaxies to our solar system is andromeda
answer 5- true that according the edwin hubble tuning fork classification scheme the SO lies between E7 and Sa.
answer 6- ture that the mostly tightly wound spiral arm belong to hubble's type is Sc. and loosely wound is Sbc.
answer 7- false. that radio galaxies emit more energy than the visible galaxy. visible galaxy emit more energy than the radio galaxy.
answer 8- true that radio wave only emit radio wave and other wise not obserable. these galaxy are very luminious at radio wavelength only.
answer 9- true that astronomer began to understand quaser spectra when it was discovered that theiir radiation is redshifted is by unexpectedly large amount
answer 10 - false
answer 11- true
answer 12- true . that Seyfarts may be missing link between the quaser and normal spiral galaxy.
answer 13- false. that our galaxy will be more active in future.
answer 14- true
answer 15 false. that distant quaser is split can be split into several images by the gravitational field of a foreground object, actually it split because of gas cloud.
answer 16 - false that 90 of universe is dark. Only 68% of universe is dark
answer 17- true
answer 18- false
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.