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Exploring Star Charts and Coordinate Systems in Astronomy

Discover the fascinating world of star charts and coordinate systems used in astronomy to navigate the celestial sphere. Learn about the constellations, the North Star, and how to find the coordinates of stars like Betelgeuse. Explore Earth and Sky terms such as latitude, longitude, and the ecliptic. Gain a deeper understanding of the changing stars and the celestial equator. Suitable for both beginners and enthusiasts.

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Exploring Star Charts and Coordinate Systems in Astronomy

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  1. Star Chartsand Coordinate Systems

  2. Astronomy Picture of the Day A Star Cluster in the Rosette Nebula

  3. Astronomy Picture of the Day This striking pair of galaxies is far, far away ... about 350 million light-years from Earth.

  4. Astronomy Picture of the Day The Constellation Orion

  5. The changing stars • The stars we see change with time of night and season of year - why? • The sky is a sphere with Earth at the center. • Observer can see only sky above the horizon • horizon……..an imaginary plane tangent to Earth at the observer

  6. Earth and Sky Terms • Latitude….LINES PARALLEL TO THE EQUATOR • Longitude……LINES THAT RUN FROM POLE TO POLE • Prime Meridian…RUNS FROM POLE TO POLE THROUGH….... • ……….Greenwich England

  7. Celestial sphere Terms • North Celestial Pole….same as North pole • South Celestial Pole….same as South pole • Celestial Equator……….Projection of earth’s equator out to the sky

  8. altitude - the angle of a star above the horizon • The North Star, Polaris, is not the brightest star in the sky but remains in a fixed position in the sky. • The angle of Polaris above your horizon is the same as your latitude in degrees.

  9. Right Ascension R.A. • Distance measured eastward along the celestial equator from zero point, called thevernal equinox • measured in hours and minutes ……. 15hr 10 min, 23 hr, 5 min

  10. Declination Dec • Angular distance above or below the celestial equator • measured in degrees…. 0o, 15o, 30o

  11. Create own Celestial Sphere

  12. SC002 Star Chart • The North Star • The Big Dipper • The Little Dipper • Cassiopeia.

  13. SC001 Star Chart • Little dipper • Cepheus • Draco • Orion • Gemini • Find the coordinates of Betelgeuse.

  14. Earth and Sky Terms • Right Ascension • Declination • Ecliptic • Vernal Equinox • Autumnal Equinox • Summer Solstice • Winter Solstice

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