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ASTR 1101Final Exam Study Guide---------------------------------------------------------------------------------------------------------------------1.1 Earth Occupies a Small Place in the UniverseIdentify your local cosmic addressUnderstand the physical nature of each component of the cosmic addressFor example: The Laniakea supercluster is a vast collection of galactic clusters, witheach cluster containing hundreds of galaxies.EarthSolar SystemMilky Way GalaxyLocal GroupLaniakeaSuperclusterPlanet8 PlanetsBillions of StarsDozens of Galaxies1000’s of Galaxies---------------------------------------------------------------------------------------------------------------------1.2 Science Is a Way of Viewing the UniverseUnderstand the various steps of the scientific methodObservationHypothesisPredictionExperimentAnalyze DataUnderstand what criteria are used to create and reject scientific theoriesBased on success rate of predictionsBe able to know the cosmological principleCosmological Principle- The assumption that the physical laws that apply here andnow also apply everywhere and at all times1.3 Astronomers Use Mathematics to Find PatternsKnow how patterns are used by astronomers to understand the physical world aroundusPatterns are useful because they allow us to predict what’s coming next and betterunderstand why that pattern is happening---------------------------------------------------------------------------------------------------------------------2.1 Earth Spins on Its AxisUnderstand the Celestial SphereBe able to identify on the Celestial Sphere the North Celestial Pole, the SouthCelestial Pole, the Celestial Equator, and the EclipticCelestial Sphere- animaginary sphere with celestial objects on its inner surface andEarth at its centerNorth Celestial Pole- the northward projection of Earth’s rotation axis onto thecelestial sphereSouth Celestial Pole- the southward projection of Earth’s rotation axis onto thecelestial sphereCelestial Equator- an imaginary circle that divides the sky into a northern half and asouthern halfEcliptic- the path of the Sun in the sky throughout the yearUnderstand how the view of the night sky changes depending on the observer’s latitudeAs you move away from the North Pole, your zenith moves away from the northcelestial pole causing your horizon to move, maintaining the sky’s shape
Know the term circumpolarKnow the term constellation
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2.2 Revolution about the Sun Leads to Changes during the YearUnderstand how the view of the night sky changes depending on the time of yearUnderstand what causes the seasons particularly in terms of solar irradiation
Know the terms Spring Equinox, Summer Solstice, Vernal Equinox, and Winter Solstice
and the times of year corresponding to eachEquinox– Day and night are equal lengths – March & September

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Term
Spring
Professor
campbell

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