History of Astronomy Crossword Puzzle

QUESTIONS LIST:

• retrograde: this type of motion occurs when planets appear to "wander" through the sky
• eratosthenes: head librarian at alexandria; calculated the circumference of earth with trigonometry
• grada: root word meaning "walk"
• navigation: the location of fixed stars & constellations in the night sky help with this
• aristarchus: this greek was one of the first to consider a heliocentric view of the solar system
• chinese: this society is one of the first to show records of comets, "guest stars" & time keeping devices
• ptolemy: this greek included epicycles in his model of space
• religion: many planets, constellations, and stars have names rooted in this
• astro: root word meaning "star"
• aristotle: this greek philosopher believed in a geocentric system with planets orbiting on crystal spheres
• scotland: one of the earliest known lunar calendars (at warren field) comes from this country
• babylonians: this is one of the earliest astronomy societies, known for its star charts & (found in the middle east)
• sundial: this utilizes the sun's shadow to determine the time of day
• equator: the sun shines directly on this during the autumnal & vernal equinoxes
• heliocentric: "sun centered" solar system
• planatia: this is a greek term meaning 'wanderer'
• five: the number of planets that early greeks could see with their naked eye
• calendars: the sun & moon cycles have been used to create these
• retro: root word meaning "back"
• astrology: the study of the positions of stars & celestial bodies with the concept that they'll influence your life or personality
• geocentric: "earth centered" system
• nomos: root word meaning "law"
• equinox: the period of time when the length of day is the same as the length of night