Intro to the Solar System/ Lenses
Intro to the Solar System/ Lenses AST 111
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This 7 page Class Notes was uploaded by Ashley Childers on Friday September 25, 2015. The Class Notes belongs to AST 111 at University of Southern Mississippi taught by Christopher Sirola in Summer 2015. Since its upload, it has received 57 views. For similar materials see General Astronomy in Physics 2 at University of Southern Mississippi.
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Date Created: 09/25/15
Astronomy lenses Filters 0 Astronomy lters light in order to view speci c wavelengths of light different features of objects Besides color lters astronomers use a variety of specialty lters example Halpha lers to see the sun 0 This shows activity on the surface granulation bubbles of gas on the sun makes the sun appear grainy and above quot aresquot solar ejections with can not be seen otherwise 0 seen 0 Different Wavelength telescopes Different types of telescopes can detect other wavelength of light Radio neutrinos inferred ultraviolet Visible light ROY G BV is very small section of the EM electro magnetic spectrum Visible light extends from violet 400 nanometers to red 700 nanometers ltwaveengths frequencygt From short to long wavelengths Gamma rays xrays ultraviolet infrared microwaves radio 0 Only visible amp radio waves get through Earth s air the others are best seen from satellites o The largest single telescope in the world is a radio telescope in Aricebo Puerto Rico Recording Observations Originally astronomers had to draw their observations on O 0 paper When photography was invented in the mid 1800 s astronomers applies it to the skies Astronomers would place a modi ed camera at the back end of a telescope instead of an eyepiece The advantage is that photographs are permanent and objective records But photographic plates only record about 1 of the light that hits them Modern astronomers use Charge Coupled Devices CCD s which are the detectors for digital cameras CCD s are far more sensitive than photographs and their images can be manipulated A CCD consist of a grid of small quotpicture elementsquot or pixels 0 When a photo of light hits a pixel it sends a signal to a computer Masses of the Solar System Mass determines gravity Gravity is attractive force only Depends on the amount of mass and the distance between masses Earth is spherical because of its gravity ravity determies orbits Types of Solar System objects 0 Type example description Star sun Jovian Planet Jupiter giant planets Terrestrial Planet Earth Minor Planet Pluto Sateite ltmoongt Titan orbiting objects Asteroid Vesta sma free oating objects 0 Comet Halley s Comet Stars 0 Objects that fuse hydrogen into helium naturally nuclear fusion In order to do this they need to be extremely massive The wait of the object causes gravity to crush the star in on its self OOOOOO 39 Talir The Sun contains over 999 of the mass of the solar system 0 The sun contains over 300000 times the mass of the earth and over 1000 times the mass of Jupiter The sun is the only star in our solar system 0 About 40 of all stars in the milky way are singles Like virtually all stars the sun is 99 hydrogen and helium the two simplest elements by mass Nuclar Fusion Insidu The Sun pressure his 1 nu Striiii39yanu i gravity II i m Neprune umm l Our Solar System Planets o Jupiter Uranus Earth Mars Mercury Venus Saturn shown without its rings Neptune Pluto is not shown Jupiter Saturin Venus Mars Mercuryr o o The Earth belongs to a class of planets called terrestrials o The terrestrial are relatively close to the sun all within 15 AU Terrestrial planets quot1E TE ri EEFIEli FE39IE39IE Eli Jtlll Elli F E 39 i Properties 0 Small Warm High density Close to the sun Few moons OOOO o o Jovian Planets The largest planets in the solar system are the gas giants also called Jovians afterJove another name forJupiter Jupiter Saturn Uranus Neptune in order 0 Like the sun jovians are also made mostly of Hydrogen and helium Layer composed or Hydrogen and Helium in liquid state Layer composed of metallic Hydrogen The core made of roolt metallic Hydrogen and Helium Hydrogen and Helium in gas state o The Jovians are further form the sun than the terrestrials o Jovian Planets Large Cold surfaces Low density Far from the sun Many moons Also have rings Check this out It s the mass comparison with objects in the universe quot l i39rlllquotgquot li l 1I39 lieinn 391i39tl39 39 391I39I l39 l ia39fn ilutl Lli391mu Rattan1 Jquot 3939u itrr F 4 l 39 quotJquot a39 39 y 1 a as i l I r rr r hull E391Il39 Ilu V I m Hui1 lquotl ll it VIM I l39n s J IIEII JI3II III