Saturday 5 August 2017

CBSE Class 8 - Science - Stars and Solar System - Stars vs Planets (#cbseNotes)


Class 8 - Science - Stars and Solar System

Property Stars Planets
Composition Made of highly compressed gases. Mainly hydrogen and helium. Made of solid rocks, liquids, gases.
Source of Light Shine because of their own light. Do not own any light.
Physical Appearance Appear to twinkle Do not twinkle
How many? A very large number. Our solar system has 8 planets.
Source of energy Nuclear fusion process Obtain solar energy. Possess thermal energy due to the hot core.
Position in the sky At particular time, the position remains almost unchanged. Positions keep changing.
Movement Appear moving east to west except for pole star. Move west to east except for Venus and Uranus.

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