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s&s Chapter 2
The Darkness He Called Night
| Question | Answer |
|---|---|
| Milky Way | Our galaxy, a milky band of stars that stretches overhead |
| Light pollution | A dispersal from street lights and other ground lighting onto the night sky that hides the stars |
| Ursa Major | Also known as Big Dipper. Considered an asterism. Not considered a true constellation. Faces Polaris, the North Star |
| Asterism | An informal grouping of stars made up of other constellations' stars |
| Ursa Minor | Contains Little Dipper and Polaris, the North Star |
| Polaris, the North Star | Always points North. Contained in Little Dipper |
| Cassiopeia | On opposite side of Polaris. Shaped like a W or 3 |
| Orion | Best known star pattern after Big Dipper. Shaped like man with sword and shield |
| Taurus | Faces Orion. Shaped like Bull. Includes Pleiades |
| Canis Major | Contains Sirius, brightest star in the sky |
| Celestial Sphere | An illusory spherical appearance of the starry sky, resulting from the near-infinite distances to the celestial bodies from Earth |
| Armillary sphere | A representation of the celestial sphere formed of rings that signify the principal circles in the sky. A device used to simulate configuration and motions of celestial sphere |
| Great circle | A circle that divides a sphere into to equal halves |
| Small circle | Any other circle that cuts a sphere |
| Poles | An endpoint of an axis along a sphere, around which the sphere rotates |
| Northern circumpolar circle | Stars that never actually set below the horizon but are always visible as they circle continuously around Polaris. Originally referred to as Arctic Circle |
| Southern Cross | A constellation that is never visible in our horizon |
| Zenith | The point directly above an observer |
| Nadir | The point directly below an observer |
| Midnight | When the Sun sinks to the lower branch of the Meridian |
| Celestial equator | Divides the celestial sphere into the Northern and Southern Hemispheres |
Created by:
Jer Stephens
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