Astronomy

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Astronomy : 

Astronomy

Astronomy & Related Sciences : 

Astronomy & Related Sciences Astronomy – study of celestial bodies Cosmology – study of the universe Astrophysics – use of physics and chemistry in the study of Astronomy Astrology – belief that links the positions of the stars and planets to human destinies; no scientific background

Tools & Technology : 

Tools & Technology Telescopes – Optical, Radio, X-ray, Ultraviolet, Infrared Spectroscope Sextant Quadrant Accelerator GPS Satellite

Universe : 

Universe Matter & Energy Formation – Big Bang Theory Composition Clusters – groups of stars, or galaxies which are held together by their common gravity Galaxies – groups of stars, gas and dust held together by gravity [spiral, irregular, barred, elliptical] Stars – self-luminous objects that shines through the release of energy produced by nuclear reactions at its core Solar System – system of planets and other objects orbiting a star [ Heating, Spinning, Flattening] Planets – an object moving around a star Planetessimals – smaller objects moving around a star

Stars : 

Stars Types – Size – Super Giants, Giants, Main Sequence, White Dwarfs, Brown Dwarfs Temp. – Spectral Class O, B, A, F, G, K, M Life Sequence H-R Diagram – Temperature, Absolute Magnitude Binary Stars, Nova, Super Nova, Quasar, Pulsar, Black Holes, Neutron Stars Electromagnetic Spectrum -

Solar System : 

Solar System Sun – made of gas, mainly H; heat and pressure causes the H atoms to fuse together to form He; fusion causes the release of energy – photons – packets of radiation Why does the Sun shine? – gravitational contraction [balance between 2 competing forces – gravity pulling inward + pressure pushing outward = gravitational equilibrium or hydrostatic equilibrium Nuclear fusion = Radiant energy

Anatomy of the Sun : 

Anatomy of the Sun Interior Core – nuclear fusion – H atoms combined to form He atoms Radiative Zone – photons travel through this zone can take millions of years Convection Zone – gases boil and radiate energy to the surface* Exterior - - Photosphere – bright/visible surface of the sun; sunspots & magnetic storms shoot hot materials Chromoshere – visible during solar eclipse/ ultraviolet radiation Corona – outermost layer of the sun/ x-ray emission Solar Flares – eruptions in the outer layer of the sun [spicules] Sun Spots Solar winds –nsteady flow of particles caused by solar winds Solar eclipse

Sol : 

Sol

Terrestrial Planets : 

Terrestrial Planets Mercury Heavily cratered; greatest temperature difference between day and night No moon Venus – Jewel of the Sky Has the same mass, diameter, density, surface gravity as the earth 900 F temp – green house effect – sulfuric acid clouds

Slide 15: 

Earth – You live in it only known planet with liquid flowing water one moon Mars Rust gives it a red color largest shield volcano – Olympus Mons Surface features are visible from earth two moons – Phobos & Deimos

Jovian Planets : 

Jovian Planets mainly H & He atmosphere liquid H surface small rocky core rotates very fast ring system – ice and rocks numerous moons – 61 Io, Europa, Calisto, Ganymede sun like but no nuclear fusion in the core

Slide 17: 

all layers are the same thickness Titan – second largest moon in the solar system ring system – ice and ice-coated rocks Cassini Division – large gaps that separates the rings Gap moons and Shepherd moons – gravity of gap moons tugs gently on nearby particles forcing particles between them into lines

Uranus : 

Uranus tipped on its side as it orbits the sun ring system Minerva – largest moon

Neptune : 

Neptune similar to Uranus’ size and composition dark spot and ring system Triton – coldest place in the solar system; orbits in the opposite direction of Neptune’s rotation

Comet : 

Comet dirty snowball; icy leftovers of planetesimal orbiting the sun origin – Kuiper Belt & Oort Cloud anatomy nucleus coma – escaping gas dust tail – solid particles Plasma tail – ionized gas

Planetessimals : 

Planetessimals

Moon : 

Moon Formation Phases Eclipse

Essential Questions : 

Essential Questions