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This gave an isophotal diameter for the Milky Way at 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years), by assuming that the galactic disc is well represented by an exponential disc and adopting a central surface brightness of the galaxy (μ 0) of 22.1 ± 0.3 B-mag/arcsec −2 and a disk scale length (h) of 5.0 ± 0.5 kpc (16,300 ± 1,600 ly).
Fifth grade. Fifth grade (also 5th Grade or Grade 5) is the fifth or sixth year of formal or compulsory education. In the United States, This is mostly the last grade of primary school, but for some states, it could be the first year of middle school, primary school generally goes from Kindergarten and ends in fifth or sixth grade. Students in ...
Galaxy Public School. / 27.7082521; 85.3303915. Galaxy Public is located in Gyaneshwar, Kathmandu, Nepal and educates over 2,500 students. Established in 1986, it offers education across levels of Kindergarten to School Leaving Certificate level, along with 10+2 in Science and Commerce specialization. [1]
An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. They are one of the four main classes of galaxy described by Edwin Hubble in his Hubble sequence and 1936 work The Realm of the Nebulae, [1] along with spiral and lenticular galaxies. Elliptical (E) galaxies are, together ...
Orbital period. ~230 million years [10] The Solar System [d] is the gravitationally bound system of the Sun and the objects that orbit it. [11] It was formed 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies. Galaxy formation is hypothesized to ...
Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance. There are several schemes in use by which galaxies can be classified according to their morphologies, the most famous being the Hubble sequence , devised by Edwin Hubble and later expanded by Gérard de ...
Citizen of the Galaxy. Citizen of the Galaxy is a science fiction novel by American writer Robert A. Heinlein, originally serialized in Astounding Science Fiction (September, October, November, and December 1957) and published in hardcover in 1957 as one of the Heinlein juveniles by Scribner's. The story is heavily influenced by Rudyard Kipling ...
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