Astronomy the Electromagnetic System Is the Range Essay

Pages: 3 (962 words)  ·  Bibliography Sources: 2  ·  File: .docx  ·  Topic: Astronomy

Astronomy

The Electromagnetic system is the range of frequency for electromagnetic radiation. It ranges from radio waves, to microwaves, to infrared, the visible region, the ultraviolet, X-rays, and finally, Gamma rays. Not all properties of all the bands in the electromagnetic spectrum are the same, their properties depend upon their frequency. Light is a member of this spectrum, represented as the "visible region." Light is next to both Infrared and Ultraviolet waves. The Sun radiates most intensely in the Ultraviolet band. Stellar Spectra is referring to the classifications of star based on measurements of the wavelengths emitted, all categorized by color.

Refracting Telescopes use lenses to directly form an image. Reflecting Telescopes use mirrors in order to acquire an image. A telescopes F-number is its focal ratio, defined as N = f / D, it determines the "aperture" of a lens, or its ability to collect light. Optical telescopes block the ambient light, and allows light from the subject to be the only focus for the eye. The unaided eye has extra light entering it, which weakens the ability of the naked eye to see outer space. Radio telescopes are similar to optical telescopes, except they measure in radio frequency instead of the electromagnetic spectrum. These telescopes often collect data from space probes and satellites. Radio telescopes can be large dishes, or they can be what's called "radio interferometers," which is a collection of telescopes in a large array linked by computers.

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Ex. 3: A stars apparent magnitude its magnitude as seen from Earth, whereas its absolute magnitude is the actual magnitude of the star when seen from space. Absolute magnitude can be measured to see its "red shift," which is a measurement of light that allows scientists to tell how far away the object is. One parsec is 3.262 light years. Sirius is 2.6 parsecs from the Sun.

Ex. 4: The Sun is a G-class star, and is a typical star on the Main Sequence. The main sequence is the common lifecycle of stars from birth until their death, with a defined path for the vast majority of stars. The property determining a stars position on the HR diagram is its color, which is determined by the components on the surface of the star being burned.

TOPIC: Essay on Astronomy the Electromagnetic System Is the Range Assignment

Ex. 5: The nearest star to Earth is the Sun. The Sun's atmosphere is called its Corona, the surface is the Photosphere, the interior is called the Radiative Zone, and the core is the super hot and dense. The core is a dense collection of thermonuclear reactions, caused by gravity's pull on Hydrogen atoms at the core, heating them up and causing the nuclear reactions. The Sun rotates in the same direction as Earth, and exists in the Orion Belt of the Milky Way Galaxy. Sunspots are cooler areas of the sun, caused by strong magnetic field that inhibit heat from emerging from the… [END OF PREVIEW] . . . READ MORE

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