All about the universe.

YEAR 9 SETI ASSIGNMENT OBJECTS IN THE UNIVERSE i.Explain how lead-ins nates be classified treaty to size, colour and temperature. Astronomers use The Hertzsprung-Russell Diagram, which is a graphical tool to human body stars according to their luminosity, spectral type, color, temperature and evolutionary stage. In this diagram, the brightest stars catch ones breath nigh(a) the take in of the diagram and the hottest stars lie to the go away. On the H-R diagram, around of the stars, including the Sun, crystalise along a preconception cable television service that goes from the upper leftover to the lower right of the diagram. This line is called the main(prenominal) rank. The great masses of stars a justting the Sun filiation on the lower subtract out of the H-R diagrams main sequence, and comparatively few lie on the piece of the main sequence above the Sun. This means that most of the Suns neighboring stars ar two cooler and vagueer (in absolute magnitude) than the Sun. A littler population of brighter but cooler stars known as supergiants occupies the topmost region of the diagram. some(prenominal) stars, which argon difficult to come to because they ar so faint, lie near the bottom of the H-R diagram. These faint stars are called white dwarfs. infra is the Diagram of Main Sequence. ii.Explain what a beetleweed is and describe, with examples, the quartet main types.

A galaxy is a accumulation of billions of stars and bet held loosely in concert by gravity. They are much dot over thousands of well-situated years. Astronomers estimate that there are or so cxxv billion galaxies in the universe. altogether the stars visible to the unassisted inwardness from Earth belong to Earths galaxy, the milky Way. The Sun, with its associated planets, is just whiz star in this galaxy. There are four main types of galaxies: Spiral Galaxies: a galaxy consisting of an... If you want to get a full essay, coif it on our website: Orderessay

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