🔍 Key Concepts

• Relationship between the Sun’s declination and its position north or south of the celestial equator • What it means when the Sun’s declination is 0° • Astronomical meaning of equinox vs solstice vs perigee/apogee

💭 Think About

• When the Sun’s declination is 0°, where is the Sun located in relation to the celestial equator? • On what two dates each year does the Sun cross the celestial equator, and what are those events called? • Do perigee and apogee describe the Sun’s position relative to Earth, or distances in an orbit?

✅ Before You Answer

• Make sure you know that declination is like latitude on the celestial sphere • Identify which term is specifically tied to the Sun being directly over the equator (0° declination) • Eliminate options that describe distance in an orbit rather than angular position (declination)