Exploring Our Solar System

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The Universe and Our Galaxies
The Universe and Our Galaxies

Examples of Elliptical (Messier 87 ) and Spiral Galaxies (NGC 3559) Examples of Elliptical (Messier 87 ) and Spiral Galaxies (NGC 3559)

Edwin Hubble was one of the first people to actually realise what a galaxy is, the measurement of the “Hubble Tuning Fork” Classification scheme shows how round or rightly wound their “arms” are. E0 means that an elliptical galaxy is extremely round,

whilst E7 is flat. However not all galaxies can be classified in this manner as there are several irregular shapes usually caused by 2 different galaxies having collided or are being influenced by the other’s gravitational force. Edwin Hubble was one of the first people to actually realise what a galaxy is, the measurement of the “Hubble Tuning Fork” Classification scheme shows how round or rightly wound their “arms” are. E0 means that an elliptical galaxy is extremely round,

whilst E7 is flat. However not all galaxies can be classified in this manner as there are several irregular shapes usually caused by 2 different galaxies having collided or are being influenced by the other’s gravitational force. The Milky Way is approximately 100,000 LY in diameter and the stars we see could be light years away. The closest to Earth of course being the Sun, the next being Proxima Centauri, 4.2 LY away. The Milky Way, as with two thirds of known galaxies, is spiral shaped with the central point causing the immense gravitational force required to pull such an immense amount of gas, stars and dust being a black hole.

As before, most galaxies are formed in a spiral shape and can contain 10 million to 10 trillion stars, and the cloud like shapes within the galaxies are caused by condensed dust and rock being pulled in by the black hole’s gravitational force. Even though most are spiral shaped, the rest of the majority are elliptical, with the rare tooth pick or ring shaped galaxies. The classification of galaxies was developed by Edwin Hubble, The Milky Way is approximately 100,000 LY in diameter and the stars we see could be light years away. The closest to Earth of course being the Sun, the next being Proxima Centauri, 4.2 LY away. The Milky Way, as with two thirds of known galaxies, is spiral shaped with the central point causing the immense gravitational force required to pull such an immense amount of gas, stars and dust being a black hole.

As before, most galaxies are formed in a spiral shape and can contain 10 million to 10 trillion stars, and the cloud like shapes within the galaxies are caused by condensed dust and rock being pulled in by the black hole’s gravitational force. Even though most are spiral shaped, the rest of the majority are elliptical, with the rare tooth pick or ring shaped galaxies. The classification of galaxies was developed by Edwin Hubble, The Universe is a vast expansion, beyond the imagination of anyone, it consists of billions galaxies, which consist of enormous groups of stars. It can also be defined everything in existence.

Our galaxy is called “the Milky Way” as illustrated to the right, with the sun being placed deep within the Orion Arm. Even though it is the centre of our orbit it is still about 26,000 light years (LY) away from the centre of the galaxy (Light years, is the distance light travels in a year, and light travels at 299,792,458 metres per second.) The Universe is a vast expansion, beyond the imagination of anyone, it consists of billions galaxies, which consist of enormous groups of stars. It can also be defined everything in existence.

Our galaxy is called “the Milky Way” as illustrated to the right, with the sun being placed deep within the Orion Arm. Even though it is the centre of our orbit it is still about 26,000 light years (LY) away from the centre of the galaxy (Light years, is the distance light travels in a year, and light travels at 299,792,458 metres per second.) http://www.atlasoftheuniverse.com/galaxy.html...
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