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Download Types of Planetary System
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Types of Planetary System All planetary systems consist of material orbiting a star. This material can range in size from grains of dust to large gaseous planets. It is held in place by the gravity of the star. Hot Jupiter Systems: These systems have a very large planet like Jupiter in our own Solar System but orbiting extremely close to the parent star. This makes the planet very hot. More than 100 of these systems have been discovered in our Galaxy. They are discovered by detecting the ‘wobble’ of the star which is caused by the gravitational pull of the planet as it orbits. A hot-Jupiter orbiting the star 51 Peg: only 0.05 AU Dusty Disk Systems: These systems have a ring of dust and comets around the star in very wide orbits. In the Vega system the outer edge of the ring is about 140 AU from the star. Any planets would be found in orbits nearer the star such as the Neptune-like planet in orbit around Vega. Orbit of Neptune-like planet around the star Vega: 65 AU Jupiter-like planet 51 Peg Neptune-like planet 1 Astronomical Unit (AU) is equal to the distance between the Earth and the Sun. Pluto Vega Neptune Earth Sun 40 AU 30 AU 1 AU Orbits of Earth, Neptune and Pluto around the Sun The Goldilocks zone: For life as we understand it to exist in another planetary system there needs to be a rocky planet in a similar orbit to that of the Earth. Here it is the right temperature for there to be liquid water - not too hot and not too cold. Our Solar System: The four large planets in our Solar System (Jupiter, Saturn, Uranus and Neptune) are quite far from the Sun, our star. This leaves room for small rocky planets . (Mercury, Venus, Earth and Mars) in smaller orbits. There are also asteroids and dust orbiting between the planets, and comets orbiting in a very large disk beyond Neptune. Pluto is part of this disk. 7KH8QLWHG.LQJGRP$VWURQRP\7HFKQRORJ\&HQWUHRQ WKHVLWHRIWKH5R\DO2EVHUYDWRU\(GLQEXUJK