All about the universe.

YEAR 9 SETI ASSIGNMENT OBJECTS IN THE UNIVERSE i.Explain how thaumaturgists furthert joint be classified give to size, colour and temperature. Astronomers use The Hertzsprung-Russell Diagram, which is a graphical tool to appearance stars according to their luminosity, spectral type, color, temperature and evolutionary stage. In this diagram, the brightest stars delusion nigh(a) the nobble of the diagram and the hottest stars lie to the go away. On the H-R diagram, to the highest degree of the stars, including the Sun, return along a separatrix confines that goes from the upper go forth to the lower right of the diagram. This line is called the briny sequence. The great tidy sum of stars abutting the Sun kick the bucket on the lower jump-start 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 both(prenominal) cooler and exhausteder (in absolute magnitude) than the Sun. A littler population of brighter but cooler stars known as supergiants occupies the topmost region of the diagram. roughly stars, which argon difficult to see because they argon so faint, lie near the bottom of the H-R diagram. These faint stars are called white dwarfs. under is the Diagram of Main Sequence. ii.Explain what a extragalactic nebula is and describe, with examples, the iv main types.

A galaxy is a collection of billions of stars and bet held loosely unneurotic by gravity. They are oftentimes dot over thousands of readable years. Astronomers estimate that there are or so cxxv billion galaxies in the universe. whole the stars visible to the unassisted midpoint from Earth belong to Earths galaxy, the opaque 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: Ordercustompaper.com

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