PPT-Distances in Space Distance Units - the AU

An Astronomical Unit AU is defined as the average distance between the Earth and Sun 1 AU 92 955 807 miles or 149 597 871 km AUs are used to measure distances within the solar system . Recap. Canvas homework due Wednesday. Lab this week: Parallax. Overview of the Universe. Solar System, Galaxy, Universe. Largest scales. Expanding Universe. Evidence for a Big Bang. Evidence for an accelerating Universe . Lecture 4: The extragalactic distance scale. Prof.. . Dr.. M. Baes (. UGent. ). Prof.. . Dr.. C. . Waelkens. (KUL). Academic year 2015-2016. The expanding Universe. One of the most important cosmological discoveries: . Input for Multidimensional Scaling and Clustering. Distances and Similarities. Both are ways of measuring how similar two objects are. Distances increase as objects are less similar. The distance of an object to itself is 0. Key Ideas. Distance is the most important & most difficult quantity to measure in Astronomy. Method of Trigonometric Parallaxes. Direct geometric method of finding distances. Units of Cosmic Distance:. Science 9. Using scientific notation. Distances in space are very large. We use scientific notation to represent very large and very small numbers. The first digit is between 1 and 9. This is called the base. Universe. Imagine that you find a star with an unknown distance, but you notice that it has a distinctive characteristic that tells you that it is a specific type of star. And let’s imagine that all stars of that type have the same luminosity, and you happen to know the value of that luminosity. You can then estimate the distance for the star you found from the inverse square law of light:. 1. 4. 3. 2. 5. 1. 4. 2. 3. 5. Phylogenetic Trees. Nodes: species. Edges: time of independent evolution. Edge length represents evolution time. AKA genetic distance. Not necessarily chronological time. AMA Stats Day – November 2016. Sarah Howell (. Kaihautū. M. ātauranga – Pāngarau). AND. Michelle freeman(Senior Teacher). The purpose of the unit . How far until it stops?. To guide Year 10 students (and teachers). FaSMEd. . Meeting 2. Evaluation . Percents. . and. . Fractions. Ahead. . with. . the. DAE. - . Metric. system. - . Graphs. Next steps. Programme. Responses of . students. . after. . completing. Gautam “G” Kamath. FOCS 2017 Workshop: Frontiers in Distribution Testing. October 14, 2017. Jayadev. Acharya. Cornell. Constantinos. . Daskalakis. MIT. John Wright. MIT. Based on joint works with. th. , 2018. Pre-Class:. What is astronomy?. Put your syllabus receipts in the Turn-In Box. . . http://apod.nasa.gov/apod/image/0708/M67_Greg_Noel.jpg. Messier 67 (M67) Star Cluster (at center). In This Lesson:. Since the averages are the same, can we assume that the students in both classes all did pretty much the same on the exam?. The answer is… No.. The average (mean) does not tell us anything about the distribution or variation in the grades.. 5. Curved Cosmos. & . Observational Cosmology. Einstein Field Equation. Cosmological Principle. General Relativity. . . . A crucial aspect of any particular configuration is the geometry of . This resource provides animated demonstrations of the mathematical method.. Check animations and delete slides not needed for your class.. Speed. What common units do we use to measure . speed. ?. Distance.