Summary

This document is a review sheet for an introductory astronomy course (AST101). It covers various topics, such as terrestrial and Jovian planets, the celestial sphere, stars, seasons, lunar phases, eclipses, the Copernican revolution and more.

Full Transcript

Introductory Definitions ======================== - - - - - - - - - - - - - - - - - - 1. 2. 3. - - - - - - - - - - - - - - - Terrestrial Planets/Jovian Planets ================================== -...

Introductory Definitions ======================== - - - - - - - - - - - - - - - - - - 1. 2. 3. - - - - - - - - - - - - - - - Terrestrial Planets/Jovian Planets ================================== - +-----------------------------------+-----------------------------------+ | *Mercury* | - - - - - - | | | | | | - - | +===================================+===================================+ | *Venus* | - - - - - | | | | | | - - - | +-----------------------------------+-----------------------------------+ | *Earth* | - - - - | | | | | | - - | | | | | | - - - | +-----------------------------------+-----------------------------------+ | *Mars* | - - - - - - - | +-----------------------------------+-----------------------------------+ - +-----------------------------------+-----------------------------------+ | *Jupiter* | - - - | | | | | | - - | +===================================+===================================+ | *Saturn* | - - - - | +-----------------------------------+-----------------------------------+ | *Uranus* | - - - - - - | +-----------------------------------+-----------------------------------+ | *Neptune* | - - - - - - | +-----------------------------------+-----------------------------------+ Celestial Sphere/Stars ====================== - - - - - - - - - - - - - - - Earth's Axis Tilt/Seasons ========================= - - - +-----------------------------------+-----------------------------------+ | *Summer* | - - - | +===================================+===================================+ | *Winter* | - - - | +-----------------------------------+-----------------------------------+ - - - - - - - +-----------------------------------+-----------------------------------+ | *June Solstice* | - - - | +===================================+===================================+ | *December Solistice* | - - | +-----------------------------------+-----------------------------------+ | *March Equinox* | - - | +-----------------------------------+-----------------------------------+ | *September Equinox* | - - | +-----------------------------------+-----------------------------------+ Lunar Phases ============ - - - - - - +-----------------------------------+-----------------------------------+ | *New Moon* | - - - - - | +===================================+===================================+ | *Waxing Crescent* | - - - | +-----------------------------------+-----------------------------------+ | *Waxing Quarter* | - - - - | | | | | (1st Quarter) | | +-----------------------------------+-----------------------------------+ | *Waxing Gibbous* | - - - | +-----------------------------------+-----------------------------------+ | *Full moon* | - - - - | | | | | | - | +-----------------------------------+-----------------------------------+ | *Waning Gibbous* | - - - | +-----------------------------------+-----------------------------------+ | *Waning Quarter* | - - - | | | | | (3rd Quarter) | | +-----------------------------------+-----------------------------------+ | *Waning Crescent* | - - - | +-----------------------------------+-----------------------------------+ Eclipses ======== - - - - - ![](media/image18.png) - - - - - - - - 1. 2. - Geocentric vs. Heliocentric Models (Copernican Revolution) ========================================================== - - +-----------------------+-----------------------+-----------------------+ | *Observations* | *Assmptions* | *Conclusions* | +=======================+=======================+=======================+ | - - - | - - | - - | +-----------------------+-----------------------+-----------------------+ - - - - - - - - - - - - Scientists Observations ----------------------- - - - - - - - - - - - - - - - - - - - - - Newton's Laws ============= Definitions ----------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Newton's Laws of Motion ----------------------- - - - - - - - - - - - - - - - - - - - - - - Orbital Energy ============== - - - - - - - - - - - - - - - - - - - - - Tides/Tidal Forces ================== - - - - - - - - - - - - - - - - - 1. 2. - - - - - - - - The Sun ======= Energy Generation ----------------- - - - - - - - - - +-----------------------------------------------------------------------+ | QUICK DEFINITIONS: | | | | - - - - | | | | - - - | | | | - - - | | | | - - | +-----------------------------------------------------------------------+ - - - - - - - - - 1. 2. 3. - - - - - - - - - - - - - - - - Properties/Layers ----------------- - - - - - - - - - - - - - - +-----------------------------------+-----------------------------------+ | ***Core*** | - - - | +===================================+===================================+ | ***Radiative Zone*** | - - - - | +-----------------------------------+-----------------------------------+ | ***Convection Zone*** | - - - - - | | | | | | - | +-----------------------------------+-----------------------------------+ | ***Photosphere*** | - - | | | | | | - - - | +-----------------------------------+-----------------------------------+ | ***Chromosphere*** | - - - | | | | | | - - | +-----------------------------------+-----------------------------------+ | ***Corona*** | - - - - | +-----------------------------------+-----------------------------------+ Sunspots -------- - - - - - - - - - - - - - - - Light/Spectra ============= - - - - - - - - - - 1. 2. 3. 4. Waves/Electromagnetic Spectrum ------------------------------ - - - - - - - - - - - - - - - - - - - - - - - ![](media/image2.png) Blackbody Radiation ------------------- - - - - - - - - - - - - - Light as a Wave and Particle ---------------------------- - - - - - - - - - Spectroscopy ------------ - - - - - - - - - - - - - The Doppler Effect ------------------ - - - - - - - - - - - Interstellar Medium =================== - - - - - - - - - - - - - - - - - - - Star Formation ============== - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Planets or Stars? ================= - - - - - The Young Sun ============= ***Property*** ***Now*** ***4.6 Million Years Ago*** ------------------------- --------------- ----------------------------- Spin Rate once a month once a week Wind modest strong Sunspots modest lots Solar Flares some lots Composition of the Core 39% H, 60% He 72% H, 27% He - - - Nebular Hypothesis ================== - - - - - - - - - - - - - - - - - 1. 2. 3. 4. 5. Exceptions + Possible Explanations ---------------------------------- - - - - - - - - - - - The Frost Line ============== - - - - - - - - - - - - - - - - - - - - - - - Carbon Dating ============= - - - - - - - - - Terrestrial Planets =================== +-----------------------------------------------------------------------+ | **RECALL:** | | | | - - - - - - | | | | - | +-----------------------------------------------------------------------+ Planetary Interiors ------------------- - - - - - - - - - - - - - - - Planetary Heating/Cooling ------------------------- - - - - - - - - - - - - - - - - - - - - - - - - - Surface Features ---------------- ### Craters - - - - - - - - - - ![](media/image21.png) - - - - - - - - - - - - - - - - - - - - - - - - - - - - ### Volcanoes/Volcanism - - - - - - - - - - - +-----------------------------------+-----------------------------------+ | *Earth's Moons* | - - - - - | +===================================+===================================+ | *Mars* | - - - - - | +-----------------------------------+-----------------------------------+ | *Venus* | - - - - | +-----------------------------------+-----------------------------------+ | *Earth* | - - - - | +-----------------------------------+-----------------------------------+ ### Plate Tectonics - - - - - - - - ### Erosion - - - - - - - - +-----------------------------------------------------------------------+ | **Changing The Surface:** | | | | - - - - | +-----------------------------------------------------------------------+ Atmospheres ----------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Small Bodies of the Solar System ================================ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Jovian Planets ============== - - - - - - - Jupiter ------- - - - - - - - - - - ![](media/image6.png) - - - - - - - - - ### Storms/Clouds - - - - - - - - - - - - - - ![](media/image11.png) ### ### Moons - +-----------------------------------+-----------------------------------+ | *Io* | - - - | | | | | | - | +===================================+===================================+ | *Europa* | - - - - | +-----------------------------------+-----------------------------------+ | *Ganymede* | - - - | +-----------------------------------+-----------------------------------+ | *Callisto* | - - | +-----------------------------------+-----------------------------------+ - - - - - - - - - - - - - - - - - - - - - - - Saturn ------ - - - - - - - - ### Moons - +-----------------------------------+-----------------------------------+ | *Titan* | - - - | | | | | | - - | | | | | | - - - - - - - - - | | | | +===================================+===================================+ | *Iapetus* | - - - - | | | | | | - | +-----------------------------------+-----------------------------------+ | *Rhea* | - - | +-----------------------------------+-----------------------------------+ | *Enceladus* | - - - - | +-----------------------------------+-----------------------------------+ | *Hyperion* | - - - - | +-----------------------------------+-----------------------------------+ ### Rings - - - - - - - - - - - - - - - - - - - - - - - - Uranus ------ - - - - - - - - - - - - Neptune ------- - - - - - - - - - - - Terrestrial vs. Jovian Planets Comparison ----------------------------------------- +-----------------------------------+-----------------------------------+ | *Terrestrial Planets* | *Jovian Planets* | +===================================+===================================+ | Mostly heavy elements | Mostly H and He | | | | | (C, Si, Fe, Ni, O) | | +-----------------------------------+-----------------------------------+ | Mostly solid with thin or no | Thick layer of gas transitions to | | atmosphere | liquid then solid | +-----------------------------------+-----------------------------------+ | Low masses | High masses | +-----------------------------------+-----------------------------------+ | Spins slowly | Spins quickly | +-----------------------------------+-----------------------------------+ | No rings | All have rings | +-----------------------------------+-----------------------------------+ | Few or no moons | Dozens of moons | +-----------------------------------+-----------------------------------+ Space Exploration ================= - - - - - - - - - - - - - - - - - - Fly-By Missions --------------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - Orbiter Missions ---------------- - - - - - - - - - - - - - - - - - 1. 2. 3. - 4. 5. - ![](media/image33.png) Lander/Probe Missions --------------------- - - - - - - - - - - - - - - - - - Sample-Return Missions ---------------------- - - - - Power/Communications -------------------- - - - - - - - - - - - - - - - - - Exoplanets ========== - - - - - - - - - - Transit Method -------------- - - - - - - - - - - - - - - - - - - 1. 2. 3. - - 4. - 5. - - 6. - - - - - - - - - - - - - - - - - - - - - - - - - - - - +-----------------------------------+-----------------------------------+ | *Strengths* | *Weaknesses* | +===================================+===================================+ | - - - - - | - - - - | +-----------------------------------+-----------------------------------+ - - - - - - - - - Doppler Method -------------- - - - - - - - - - - - - - - ![](media/image5.png) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +-----------------------------------+-----------------------------------+ | *Strengths* | *Weaknesses* | +===================================+===================================+ | - - - | - - - - | +-----------------------------------+-----------------------------------+ - - - Search for Extraterrestrial Life (SETI) ======================================= - - - - - - - - - - 1. 2. 3. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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