Unit 1 Worksheet

the study of ancient structures and their connection to astronomical timing and events
the imaginary sphere on which objects in the sky appear to reside when observed from Earth
means wanderers because they changed position amongst the fixed background of stars.
Earth is the center of the universe with everything orbiting Earth
motion that looks backward compared to the norm.
Credited as the founder of Greek science; thought the Earth was flat and surrounded by a sheet of water
First Greek astronomer to propose that the Earth and other planets go around the Sun
first to measure and calculate the circumference of the Earth.
His Earth-centered model of the universe remained in use for 1500 years
the small circle upon which a planet moves while simultaneously going around a larger circle (the deferent) around Earth
a region of the sky with well-defined borders
the point directly over Earth’s North Pole.
the point directly over Earth’s South Pole.
the path the Sun follows as it appears to circle around the celestial sphere once each year.
the sky as seen from wherever you happen to be standing
the boundary between Earth and sky
the point directly overhead
an imaginary half-circle stretching from the horizon due south, through the zenith, to the horizon due north.
degrees clockwise from due north; used to locate an object in the sky
the angular distance between the horizon and an object in the sky
1/60 of a degree
1/60 of an arcminute
a star that always remains above the horizon for a particular latitude
the constellations along the ecliptic