The Sun 1- WEB PAGE: Solar Images (NASA Heliosphe…


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25.50

The Sun 1- WEB PAGE: Solar Images (NASA Heliospheric Observatory-SOHO) http://sohowww.nascom.nasa.gov/ Select: Menu-Gallery. Select: Movies-Comets. Select: Two comets plunging into the solar corona-June 2, 1998. Watch the Sun movie and notice the Coronal Mass Ejection. The photosphere of the sun is artificially blocked out. This intentional shielding allows for study of the outer solar atmosphere. Go Back: To movie page Select: Animations (Under Movie Heading in left column on screen) Select: Animation of a CME leaving the Sun, slamming into our magnetosphere and Animation of solar wind impacting the magnetosphere and creating aurora What was observed? 2- WEB PAGE: Earth-Sun Relationships (Stanford Solar Center) Select: Video-Colors of The Sun What was observed? The Stars 3- The stars that form a constellations or an asterism like the Big Dipper are? 1) all at the same distance as seen from our planet 2) all in the same direction as seen from our planet 3) all in the same part of space and in the same direction as seen from earth 4) the same shapes as viewed from other places in the universe 4- The distance of nearer stars may be measured by observing their apparent motion as: a) the earth orbits the sun b) the earth rotates on its axis c) the nearby stars actually cross along the observer’s line of sight d) the nearby stars actually move along the observer’s line of sight 5- Star X is known to be 10 parsecs away from us and star Y is 50 parsecs away. Which star has the greater parallax angle? a) star X b) star Y c) Neither-their parallax angle is the same Web Page: http://astro.unl.edu/classaction/animations/stellarprops/parallaxdiag.html 6- Which of the following stars is closest to us? a) Procyon (parallax angle=0.29 arc seconds) b) Ross 780 (parallax angle=0.21 arc seconds) c) Regulus (parallax angle=0.04 arc seconds) d) Sirius (parallax angle=0.38 arc seconds 7- How far away in light years is the furthest of the above listed stars? 9- How far away would a star with a parallax angle twice that of your above answer be in light years? 10- Assume you are outdoors in the Boundary Water Canoe Area of Northern Minnesota. You have in your hand the empty tube from a roll of paper towel. Outline the mathematical steps you would take to help you achieve an accurate estimate of the stars in the night sky. Score: 0, 1, 2, 3 Detailed procedure and sequenced strategy of plan (Please see attached document)

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25.50