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    Solarsystem2 Solarsystem2 Presentation Transcript

    • 11/15/99 Norm Herr (sample file)SOLAR SYSTEM• The Sun• Nine Planets• Sixty-one satellites of the planets• Many Comets and asteroids
    • 11/15/99 Norm Herr (sample file)SUN• 75% hydrogen and 25% helium by mass• Sun converts hydrogen to helium in itscore• Differential rotation– equator the surface rotates once every 25.4 days– near the poles its as much as 36 days• Core conditions– temperature is 15.6 million Kelvin– pressure is 250 billion atmospheres
    • 11/15/99 Norm Herr (sample file)MERCURY• Orbit– highly eccentric– perihelion 46 million km– aphelion it is 70 million km• Closest to sun• Appears to travel fastest• 8th largest
    • 11/15/99 Norm Herr (sample file)VENUS• 2nd from Sun• 6th largest• brightest• inferior planet– shows phases when viewed from Earth– Galileos observed phases– Copernicus used data to develop heliocentric theory.
    • 11/15/99 Norm Herr (sample file)EARTH• 3rd from the Sun• Moon is 1/6 mass of earth• period of rotation: 24 hours• period of orbit 365.25 days
    • 11/15/99 Norm Herr (sample file)Where are you?
    • 11/15/99 Norm Herr (sample file)MARS• Mars is the 4th Planet from the Sun• Solid carbon dioxide is found at the poles• Mars is known as the Red Planet• Visit JPL’s Mars Exploration Page
    • 11/15/99 Norm Herr (sample file)JUPITER• Jupiter contains over 70% of the mass in the solar system outsidethe Sun.• It is about 11 times the radius and 330 times the mass of the earth.• It is the first representative of the outer solar system.• Unlike the inner planets, Jupiter is not a solid body, but instead is aball of gas and liquid (mostly hydrogen and helium).– From the earth, there are two obvious clues to this:– 1. Jupiter, which rotates extremely rapidly (a period ofabout 10 hours), has a significant bulge at the equator. We call thisoblateness, and– Jupiter has an oblateness of about 6%, which means thatthe equatorial diameter is 6% greater than the polar diameter.– 2. In addition, Jupiter rotates differentially, just as the Sundoes. The period of rotation at the poles is about 10 minutes lessthan that of the equator, while the interior rotates at anintermediate speed.
    • 11/15/99 Norm Herr (sample file)SATURN• Saturn:– Saturn is a gas giant.– It has strong surface winds (500 m/sec).– Saturn is less dense than water.– Saturn’s magnetic field is 20x less than Jupiters, but its core rotation period(10.5 hours) is similar.• Saturn’s Moons:– Titan is the big one, and is larger than planet Mercury!– Mimas has a huge crater.– Epimetheus and Janus, just inside the orbit of Mimas, are continuallyexchanging orbits with one another in a "waltz" -- they are called the coorbitalsatellites.
    • 11/15/99 Norm Herr (sample file)URANUS• Uranus has more moons (15) than any otherplanet except Jupiter (16) and Saturn (23)!0510152025MercuryEarthMarsJupiterSaturnUranusNeptunePluto
    • 11/15/99 Norm Herr (sample file)NEPTUNE• The blue coloration of Neptune is probably due tothe presence of methaneNote the apparent storms
    • 11/15/99 Norm Herr (sample file)PLUTO• Pluto is very small as planets go, only 0.002 Earthmasses.• Pluto’s orbit is elliptical : it varies from 29 to 49A.U. from the Sun, crossing inside of Neptunesorbit.• Plutos orbit is inclined 17deg to the ecliptic, so itgoes farther above and below the plane in whichthe other planets formed than any other planet.
    • 11/15/99 Norm Herr (sample file)Sample Quiz QuestionsQuestion: Which of the planets are rocky?Answer: The inner planets: Mercury, Venus, Earth and Mars
    • 11/15/99 Norm Herr (sample file)Sample Question 2• Which of the planets has the most satellites?Saturn!
    • 11/15/99 Norm Herr (sample file)Credits• This sample file was created by Norm Herr foruse in SED 619 at CSUN• Photographs are provided by the NationalAeronautics and Space AdministrationMenuHome
    • 11/15/99 Norm Herr (sample file)MenuSunVenusMercuryEarthMarsJupiterSaturnUranusNeptunePluto