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Obscure our views of stars behind them, so we would not be able to see aġ9. No, the dark lanes appear in regions where dense interstellar clouds To see Orion, then your grandfather saw it too.ġ8. No, the constellation Orion was seen by the Greeks so if they were able This concept was difficult for early astronomers toĮxplain because they believed that we lived in an Earth-centered solar system.ġ7. Normally moves eastward relative to the stars, appears to move westward Apparent retrograde motion of the planets is when the planet, which Now, because of precession, our axis will point towards Vega, making Vega ourġ5. Right now our axis is pointing towards Polaris but in around 13,000 years from
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Precession affects the sky that we see from Earth because as of
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It is due to a torque, a force acting perpendicular to the Precession is the gradual wobble of the axis of a rotating object around a One arcminute is 1/60 of a degree and one arcsecondġ1. ArcminutesĪnd arcseconds are finer gradations the angular size or angularĭistance of an object. To judge the true size or separation of objects that we observe. Sky because we lack depth perception on the celestial sphere, making us unable We can only measure angular sizes and angular distances for objects in the
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Visible in the southern hemisphere carry names that originated with 17thĥ. Traced back to civilizations of the ancient middle east and constellations Got their names from the International Astronomical Union (IAU) choosingĬonstellation names that were familiar to American and European astronomers.Ĭonstellations visible in the Northern hemisphere have names that can be A constellation is a region of the sky with well-defined borders. Stars, the number of grains of sand on the Earth is comparable to the amount ofġ. Assuming that there are 100 billion galaxies each containing 100 billion Milky Way Galaxy, the Local Group, the Local Supercluster, and finally theģ1. Going from smallest to largest we have: earth, the solar system, the Galaxies moving away from wherever we are.Ģ5. Has a center and edges, we could go to any point in the universe and see Reviewing the raisin cake analogy, since we do not believe that the universe No, it is true that all galaxies look to be moving away from us but, Voyage Model, the Earth is the size of a pall point pen and at a distance ofĢ4. Represent it if one is using a park to represent our solar system. No, because the Earth is far to small to be able to use a basketball to Yes, because light takes time to travel through space.Ģ3. Objects that lie within 13.7 billion light years.Ģ2. Universe is 13.7 billion years old, our observable universe consists of Would consist of objects that lie within 6 billion light years. No, if the universe were only 6 billion years old, our observable universe Years, and that's if we traveled at the speed of light.Ģ1. The distance to travel to get to the edge of our galaxy is around 22,000 light No, because we do not have the right technology for interstellar travel. No, because the definition of a moon is an object that orbits a planet.Ģ0. Yes because the space ship is traveling the distance of one light year inġ9. No, a light year is a measurement of distance, not time.ġ8. No, a light year is a measurement of distance, not time.ġ7. No, there is one star in our solar system and galaxies contain millions toġ6. Our solar system, along with surrounding stars, moveġ5. Extending from thisīulge are spiral arms. Our galaxy is a spiral shape with a central bulge. Space, anything that we look at is as old as the time it takes for the lightġ2. The quote mentioned means that since light takes time to travel through A light year is the distance that lightĦ. Which we are made was created inside stars that died before the birth of ourĥ. Carl Sagan use to say we are "star stuff" because most of the material from Universe or a Sun-centered universe (everything in our solar system revolvingĤ. A geocentric universe is an Earth-centered universe (everything in our solar If you do not arrive at these answers, you shouldġ.
#Are x rays from the sun corona quizlet how to
It is most important that you know HOW to Provide these so that you may check your answers, and determine whether or The following are the answers to the homework assignments. AST 101: Homework Solutions AST 101: Introduction to Astronomy Homework Solutions Spring 2007 Updated 27 January