Celestial Globe - Physics Demonstrations - Celestial Globe | Physics Undergraduate Labs

Purpose

A transparent globe marked with constellations and stars (down to fifth magnitude) surrounds a small Earth, showing the geocentric perspective of the sky. Students see how observer latitude, time of day, and time of year determine which portion of the celestial sphere is visible.

Transparent celestial sphere on clear acrylic stand with a small blue Earth globe at center, white star dots and constellation lines on the outer sphere, and a Starry Night branded base

Close-up of the blue Earth globe inside the celestial sphere, showing South America and the Tropic of Capricorn, with Draco and the Big Dipper visible on the outer sphere

Figure 1: The celestial globe with Earth at the center demonstrates the geocentric perspective of celestial coordinates, showing how observers see different portions of the sky based on their location and time.

Figure 2: Detail showing Earth's position within the celestial sphere with geographic and celestial features aligned, illustrating how latitude determines which constellations are visible and circumpolar.