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ASTR 1400 LAB FINAL – TTU ASTRONOMY LAB STUDY GUIDE, PRACTICE QUESTIONS & REVIEW 2026/2027

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ASTR 1400 LAB FINAL – TTU ASTRONOMY LAB STUDY GUIDE, PRACTICE QUESTIONS & REVIEW 2026/2027

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ASTR 1400 LAB FINAL – TTU ASTRONOMY LAB STUDY GUIDE, PRACTICE
QUESTIONS & REVIEW 2026/2027

New moon - rise: sunrise
on meridian: midday
set: sunset

1st quarter moon - rise: midday
on meridian: sunset
set: midnight

full moon - rise: sunset
on meridian: midnight
set: sunrise

3rd quarter moon - rise: midnight
on meridian: sunrise
set: midday

define celestial equator - projection of Earth's equator on the celestial sphere

define ecliptic - path the sun takes during the day

define north celestial pole - projection of Earth's north pole on the celestial sphere

define south celestial pole - projection of Earth's south pole on the celestial sphere

define meridian - circle of constant longitude passing through given place on earth's surface and
terrestrial poles

local sidereal time and RA of objects on meridian - equal same value

declination of star or object - start at 90 degrees (Polaris)

angular separation between two objects - measure fists between the two objects

altitude of given object - make a fist and measure from the ground up

define summer solstice - longest day of the year; sun is highest in sky

define winter solstice - shortest day of the year; sun is lowest in sky

define vernal equinox - 1st day of spring

define autumnal equinox - 1st day of fall; equal hours

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