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Astronomy Notes # 2

by: Lindsey Notetaker

Astronomy Notes # 2 Astronomy 104

Lindsey Notetaker

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About this Document

This is the discussion from the second day of Astronomy.
Astronomy/Solar System
Jason Boyles
Class Notes
25 ?




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This 4 page Class Notes was uploaded by Lindsey Notetaker on Tuesday February 9, 2016. The Class Notes belongs to Astronomy 104 at Western Kentucky University taught by Jason Boyles in Spring 2016. Since its upload, it has received 9 views.


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Date Created: 02/09/16
FEBRUARY 3, 2016 Astronomy: Discovering the Universe for Yourself What We Can View  The Galactic Plane of the Milky Way. You need a dark area though, outside of city limits, where stars are clearer.  Constellations. By definition, they’re the “divine region in the sky.”  Example of a constellation is Orion. We think of its shape as a “man”. Giving the stars their names has made them more familiar to us. Constellations  Every culture has their own. (Oldest names start with “Al”  Astronomers came together and created unified names.  Many are based on Latin or Arabic names.  Celestial Sphere- Older belief that the night sky was a sphere around our atmosphere. It may appear to be so, but stars are actually different distances away. Viewing the Galaxy  When we look out of the galactic plane, we have a clear view to the distant universe. FEBRUARY 3, 2016  When we look in any direction into the galactic plane, we see stars and interstellar clouds. Local Reference Frame  “Pointing” isn’t accurate.  Reference Frame helps.  Altitude angle is measured with respect to the ground.  Directly above the head=90° Calibrating Angular Size  Distance between pointer stars of Big Dipper= 5°  Distance of length of the Southern Cross= 6° FEBRUARY 3, 2016 Degree, Arcminute, and Arcsecond Rising and Setting of Stars:  Appear to do so because of Earth’s spinning.  Earth rotates West to East.  Celestial sphere appears to rotate East to West. Physical Limitation of Viewing Stars  We can’t see past the other side of Earth. We can’t see all the stars all at once. Only half within our eye sight.  We can always see certain stars, known as Circum Polar Stars. Example= Polaris. FEBRUARY 3, 2016  The sun can also hinder the view of stars. Celestial Sphere to Earth  Locate any place on Earth with longitude and latitude.  Be careful when locating objects in the sky: there’s a variation/ function (result) of points on Earth, and time of day and/ or year can affect the position of the object. Time of Day   (Northern Hemisphere) Pointer stars of the Big Dipper always point to Polaris.  Time of year affects what stars/constellations we see.


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