21. The Hindu zodiac uses the sidereal coordinate system, which makes reference to the fixed stars . 22. The planets and fixed stars are projected onto the inner surface of a white cupola. 23. Astronomers took careful note of " guest stars " which suddenly appeared among the fixed stars . 24. Smaller planetarium projectors include a set of fixed stars , Sun, Moon, and planets, and various nebulae. 25. And unlike Anaximander, he relegated the fixed stars to the region most distant from the Earth. 26. So fixed stars disappearing that quickly couldn't be what tips everyone off that something has happened. 27. Astronomers took careful note of " guest stars ", which suddenly appeared among the fixed stars . 28. The Alfonsine tables computed the positions of the sun, moon, and planets relative to the fixed stars . 29. All our knowledge of motion, he pointed out, was only relative to the " fixed stars ." 30. One thing that remained in the Ptolemaic system for Brigden was the sphere of the fixed stars .
