Quick Answer: The Planisphere STEM Lab is a 30 cm two-disc star map set for latitudes 20°N to 30°N. Turning the upper disc to line up the date with the time shows which constellations and bright stars are above the horizon.
Last updated: October 2026
Key Features
Large 30 cm diameter dual-disc planisphere
Set for latitudes 20°N to 30°N
365-day calendar wheel matched to a 24-hour time scale
Compass direction markers on the border
Star dots sized by brightness, with constellations and deep-sky objects marked
Red-light observation LED, logbook and 5 student worksheet masters included
Setting a date against an evening time, then holding the disc overhead with its compass markers matched to the real directions, lets students find constellations in the actual sky. Advancing the time wheel over a few hours shows the stars wheeling round, a direct way to discuss the Earth’s rotation, seasonal skies and celestial coordinates without screens or batteries.
Frequently Asked Questions
How is the Planisphere set for a particular night?
Rotate the upper transparent disc until the date on the outer scale lines up with the local time of observation. The oval window then shows the sky for that moment.
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