Harlow Shapley provided some useful information in determining some of the greatest mysterious about the cosmos. Shapley essentially believed that sun was not the center point of the galactic frontier. In the first decade of the 29th century not much was known about the Milky Way but Shapley soon hypothesized some useful arguments that suggested that our universe is much larger and diverse than we can possibly imagine.
To support his argument about a non-heliocentric theory of the galactic composition, he used the powerful technology available to measure a type of celestial object known as Cepheid stars. Shapley used the behavior of these stars to determine that sun was not the center of the galaxy. By assuming that these stars were the nearly the same size he figured he could measure the luminosity of these stars and therefore figure out a linear distance to the stars. Using these distances, and some rather absurd assumptions about the limitations of the cosmos, he guessed that the our solar system was not at the center of the Milky Way.
Question 2
The idea of a cluster is simple: a grouping of objects. In astronomy groups forms for what we assume for real and important purposes. Two kinds of sidereal clustering appears in our observations of space. Globular clusters are one of these forms that helps give some clues about the nature of the universe. Globular clusters are groups of stars that appear to orbit around galaxies....
The diameters of these clusters range from about 75 light years to as much as 400 light years and can be as far as 300,000 light years from the Earth. In many parts of the Milky Way galaxy, there exist dense concentrations of interstellar matter known as nebula and are generally classified as emission nebula, reflection nebula or dark nebula. Emission nebula are by far the most exotic, for they
Milky Way Galaxy is of particular interest to the planet Earth, and the people that reside there, because the planet is one of, possibly, billions contained within it. The term galaxy is used when a large group of stars, generally a billion or more, have clustered together due to a similar attraction to some gravitational attraction. The Milky Way Galaxy is actually a conglomeration of others such as the Canis
There must be an invisible force that is acting on those galaxies. These two features make the accelerating universe the most probable explanation amongst its competitors (Riess 2012). Major surface features of a) the Earth's Moon The moon's major surface features are craters, rays formed through the crashing of meteorites into the moon's surface. There are also Marias and mountains. Marias is a dark hole like features of the moon and
The age of the universe A good way of estimating the age of the universe is dating the oldest objects in the Milky Way Galaxy. Being that the age of the universe varies directly with the Hubble constant, the cosmological constant and the average density of the universe, the direct estimate of the age of the universe can be used to define cosmological models. The metal-poor stars found within the spherical
The materials that are collected in them are solids from the various gases (which cooled inside these clouds). The gravity from the sun pulled them closer towards each other. This contributed to the formation of the planets and asteroids. ("Summary," 2007) (Williams, 2010) Once a star is finished developing, is when solar winds will blow rock and debris away from the sun. This forms the Kuiper Belt and Oort Clouds,
Electromagnetic waves are energy waves produced by the oscillation or acceleration of an electric charge. They include radio waves, microwaves, infrared light, visible light, ultraviolet light, x-rays, and gamma rays. Their wavelengths in meters are: radio waves (0.1 to 1000), microwaves (1 x 10-3 ~ 1 x 10-1); infrared (7 x 10-7 ~1 x 10-3); visible light (4 x 10-7 ~ 7 x 10-7); ultraviolet rays (1 x 10-8 ~
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