X Stands for Unknown17 essays selected from the magazine "Fantasy and science fiction." |
Contents
INTRODUCTION | 9 |
PHYSICS | 13 |
READ OUT YOUR GOOD BOOK IN VERSE | 15 |
Copyright | |
20 other sections not shown
Common terms and phrases
analemma Andromeda appearance Asimov astrology astronomer Bible boiling point bright called carbon atom carbon dioxide center of gravity chain circle Clarke orbit color Comet Encke Comet Halley Comet Kohoutek compounds crystal cycles per second detected direction distance Doubleday electric current electromagnetic radiation electrons Empire energy equal equation exist frequency Galaxy gamma rays geosynchronous orbit globular clusters Greek happened heavens Herschel hydrogen atoms imagine infrared radiation instance integer Jansky Jupiter kilometers Mars matter melting metal meters Milky molecules Moon move n-type Nebula novas objects octaves orbital area orbital eccentricity oscillating oxygen atoms parsecs particles period of revolution physicist planetary planets produce quartz radio waves reason RR Lyrae variables satellite scientists seemed semiconductor sidereal day silicates silicon atoms silicon dioxide solar spectrum Solar System spherical stars subtract supernova Suppose surface systemocentric temperatures thing trillion cycles turned ultraviolet Universe violet visible light wavelength