Exploring the Heavens Terms

Exploring the Heavens Terms - Exploring the Heavens-Terms...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Exploring the Heavens-Terms 1. Planet - one of nine major bodies that orbit the sun 2. Star - a glowing ball of gas that is held together by its own gravity and powered by nuclear fusion in its core 3. Galaxy - gravitationally bound collection of a large number of stars. The sun is a star in the Milky Way galaxy 4. universe - the totality of all space, time, matter, and energy 5. astronomy - the study of the universe 6. Constellations - a human grouping of stars in the night sky into a recognizable pattern 7. celestial sphere - Imaginary sphere surrounding earth to which all objects in he sky were once considered to be attached 8. rotation - spinning motion of a body about an axis 9. North celestial pole - point on the celestial sphere directly above earth’s North Pole. 10. South celestial pole - point on the celestial sphere directly above earth’s South Pole. 11. celestial equator - The projection of earths equator onto the celestial sphere 12. Celestial coordinates - pair of quantities-right ascension and declination-similar to longitude and latitude on earth, used to pinpoint locations of objects on the celestial sphere. 13. Declination - celestial coordinate used to measure latitude above or below the celestial equator on the celestial sphere. 14. Right ascension - celestial coordinates used to measure longitude on the celestial sphere. The zero point is the position of the sun a the vernal equinox. ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ 1.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/02/2008 for the course ASTR 101 taught by Professor Caffo during the Fall '06 term at New Mexico.

Page1 / 3

Exploring the Heavens Terms - Exploring the Heavens-Terms...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online