This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Stars Look Different from Planets Planets (and the Sun and Moon) have some observational characteristics that distinguish them from what we would now call the stars: Observational Differences between Planets & Stars PLANETS STARS The planets move relative to stars on celestial sphere The relative positions of the stars are fixed on celestial sphere The nearer and larger planets appear as disks in telescope The stars appear as "points" of light, even through the telescope The brighter planets do not "twinkle" The stars appear to "twinkle" The planets are always near the imaginary yearly path of the Sun on the celestial sphere (the ecliptic ) Stars can be anywhere on the celestial sphere These observational differences, particularly the "wandering" of the planets on the celestial sphere, attracted a lot of attention from ancient observers of the sky. The attempt to explain these differences ultimately led to the birth of modern astronomy....
View Full Document
This note was uploaded on 12/04/2011 for the course ANT ANT2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.
- Fall '10