ASTR 151 1st Edition Lecture 1 Outline of First Lecture II. Introduction into the class and Professor InformationIII. Hypothesis Defined:A. A supposition or proposed observation made on limited evidencei. Observations are limitedIV. Model Defined as a simplified view of realityV. Scientific Law Defined:A. A law that does not explain why something works, it merely states that something works with no evidence to back up the claimVI. Chapter 1: Scientific TheoryA. Scientific Theory must meet the following criteria before being consideredi. Beauty – visually pleasing but doesn`t need to be universalii. Simplicity – must be easy to decipher like Ockham`s Razor for exampleiii. Comprehensiveness – the more observation that is done before theory is formed, the betterB. Scientific Method as a constant cyclei. Formulate a question, do research to contrast hypothesis, test research through experiments, create new questions and start the process over.C. Unit 1.1 Astronomy is the study of the Universei. The universe a totality of all space, time, and matterii. Space is measured in light yearsiii. The galaxy is about 100,000 light years acrossD. Unit 1.2 A Scientific Theories can be proven wrong but, can`t be proven right with100% certainty.i. Observation leads to theory, theory is best proven by observation: this is considered as “The circle of Science Life.”ii. About 3,000 stars are visible at night to the naked eye, Ancient Romans grouped them together and called them Constellationsiii. Constellations are groupings of stars that have meaning and purposeiv. When locating stars, astronomers use the celestial sphere to gain two-dimensional coordinates in the sky.1. The concept is based off the latitude and longitudinal lines on the earth.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.v. Angular Measure is used with a base of 10, this also depends on the size of the actual starvi. The coordinates are written in degrees, arc minutes, and arc secondsa. Full circle = 360 degreesb. 1 degree = 60 arc minutesc. 1 arc minute = 60 arc
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