Castalia Institute

Astrarium.

A bedtime star projector and astronomy sleep companion for children — built on a HY300 projector. Evenings bring guided constellation tours with audio lessons; at midnight, the sky embarks on a silent 3D faster-than-light journey to the featured constellation's farthest star, and drifts home by dawn.

Features

Guided constellation toursEvening journeys through the night sky with narrated audio lessons for young stargazers.
The midnight journeyA silent 3D faster-than-light flight across the sky to the featured constellation's farthest star — home again by dawn.
The Milky Way & planetsTextured globes of the planets, the sweep of the Milky Way, and passing satellites overhead.
Parent control PWASchedule bedtime wind-down, pick lessons, and monitor the night from any device on your network.

Inside Astrarium

A live view from the projector, the stars and stories it puts on the ceiling, and the LCARS console used to guide the night.

Astrarium's spherical projector illuminated in blue light
01 · The projectorAstrarium's night sky projector

A compact spherical projector brings the starfield into the room.

Astrarium LCARS projector dashboard displayed between illuminated handheld controls
02 · LCARS dashboardProjector controls at your fingertips

The live LCARS dashboard running on the handheld control display.

Open the LCARS dashboard ↗
Live capture from Astrarium showing a starfield across the projector's spacecraft-window view
03 · Projected skyThe night sky, from Astrarium's live display

A direct capture of the projector's starfield.

Cassiopeia constellation artwork used in Astrarium's sky lessons
04 · Sky lessonConstellations traced in amber

Real stars, connected for an evening guided tour.

A night with Astrarium

EveningGuided constellation tour with audio lessons, then the sky settles.
MidnightSilent 3D FTL voyage to the featured constellation's farthest star.
DawnThe journey returns home as the room brightens for morning.
Cassiopeia traced in amber line art over a starfield
Each night the featured constellation is traced in amber — this month, Cassiopeia.

Align your room

Open http://<player-ip>:8080/align on your phone to photograph the ceiling and calibrate windows into the starfield.

Astrarium experiences

Astrarium projects a Milky Way starfield inside a pop-up tent at night
Turn a pop-up shelter into a private starfield for a cozy night under the sky.
A porthole window of stars over a curved Earth horizon
Window mode — a porthole over Earth, calibrated to your own ceiling.

Explore the book

Travelling Through Space In Time ↗Open the interactive book on A.R.G.O., celestial navigation, and journeys through space and time.