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Becoming a better astronomer part i
- 2. Three Elements of Visual Astronomy Observing Observer Experience Patience Equipment Light Grasp Alignment Environment Seeing Transparency
- 3. Tools of the Trade • Planisphere • Star Chart • Finder Scope
- 7. Finder Scope
- 8. Telrad
- 14. Having an observing list can make your night under a dark more productive and rewarding
- 15. The elements of an observing list can tell you a lot of information You can use this information to locate objects in the night sky with the aid of a planisphere and star atlas
- 16. Objects names can be: • Catalogue designations • “Proper Names” NGC 457 ET Cluster Owl Cluster All the same object
- 17. Most Recognized • NGC Catalogue • IC Catalogue • Messier Catalogue • Caldwell Others • Collinder • Stock • Trumpler • +++ They can overlap!!! M42 is also NGC 1976
- 18. • Stars • Double Stars • Open Clusters • Globular Clusters • Planetary Nebula • Reflection Nebula • Dark Nebula • Galaxies
- 19. • Patterns of bright stars in the sky • IAU-designated boundaries, marking out specific sky regions • Most names from ancient times • There are 88 of them in all • 53 are visible from our latitude • About 20 or so are worth learning
- 20. • Coordinates in the sky • Like Longitude and Latitude • This is a topic we can dig into later
- 22. Relative Magnitude Brightness as seen from Earth Absolute Magnitude How bright it really is
- 26. Surface Brightness Object dims as size increases Magnitude 5
- 27. Celestial objects are measured by Angular Size Size
- 28. Distance and Size Angular Distance
- 29. A handy way to measure distances in the night sky
- 30. Why own multiple eyepieces 40mm EP / FOV – 2 or 120’ M75 – 6’ 5% of the width across the EP 10mm FOV – .5 or 30’ M75 – 6’ 20% of the width across the EP
- 31. Surface Brightness is Magnitude spread out over an area More useful than magnitude, but less common to find
- 32. • Object Name • Type – What to expect • Constellation – Where to point • RA & Dec – To find it on the chart • Magnitude – How bright it is • Size – How large/small it is What did we learn?
- 33. Any Questions?
- 34. Clear Skies!!
Editor's Notes
- The purpose of this series is to aid you in becoming a better astronomer Brief overview: The Eckley 100 Observing List
- Planisphere - Interactive map of the sky Star Chart - More detail for fainter stars and other objects Finder Scope - Makes locating objects much easier
- These only work if they are co-aligned with the main scope
- Click – FOV on scale Click – 2’ FOV on Hercules Click – 1’ FOV on Hercules
- Click – 5’ FOV Click – FOV moves Click – EP FOVs
- Click – Others Click - Overlap
- Click – 2nd graphic Click – New bulb