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Astronomy & Space Sciences

Aeolian Landscape
Aeolian Landscape

Aeolian Landscape presents a swirling storm of sand inside a large chamber covered by a plexiglass top. A knob on the top of the exhibit rotates a sturdy fan set in the base of the chamber.

Where:   Bechtel Gallery 3, Wattis Studio

Braided Stream
Braided Stream

This artwork features air bubbling up through a fine powder constrained between two glass plates tilted at a 45 degree angle. The tilting creates a continually changing landscape evocative of aerial photographs of river drainage networks on Earth and on Mars.

Where:   Fisher Bay Observatory Gallery 6, Mezzanine

Cloud Chamber
Cloud Chamber

Look down into the chamber and you’ll see an ongoing cascade of thin white trails appearing and disappearing. These are cosmic ray tracks, created by high-energy subatomic particles from space.

Where:   Crossroads: Getting Started

Fluvial Storm
Fluvial Storm

Swirling water sculpts elaborate patterns of underwater dunes.

Where:   This exhibit is not currently on view.

Geysers
Geysers

The timing of the eruptions of these geysers depends on water temperature and pressure.

Where:   Gallery 4: Living Systems

Icy Bodies
Icy Bodies

Like comets, these chunks of dry ice slowly disintegrate as they move, leaving a visible trail of condensed water vapor.

Where:   Fisher Bay Observatory Gallery 6, Mezzanine

Inverse Square Law
Inverse Square Law

Light gets dimmer the farther it travels–and a bit of simple math explains how.

Where:   Osher Gallery 1: Human Phenomenon

Oculus Table
Oculus Table

Oculus Table introduces a contemporary twist on a common ancient Greek sundial, the scaphe (σκάφη or "bowl"). With sunlight streaming through the oculus—the hole in the ceiling of the Fisher Bay Observatory—the movable table can be visually aligned with landmarks on the skyline (Coit Tower, Transamerica Pyramid, etc.) to discover the Sun's position in the sky and the current time and date.

Where:   Fisher Bay Observatory Gallery 6: Observing Landscapes

Sun Dial
Sun Dial

Cast your shadow and know the time.

Where:   Gallery 5: Outdoor Exhibits

Sun Painting
Sun Painting

Created by artist Bob Miller, this classic Exploratorium exhibit is a “live” painting that uses light from the Sun as its palette.

Where:   Bechtel Gallery 3: Seeing & Reflections

Turbulent Orb
Turbulent Orb

The fluid in the sphere shows swirls and waves of internal fluid motions produced by the actions of the visitors. The turbulence of the fluid in the sphere is reminiscent of the turbulent flows that occur in planetary atmospheres.

Where:   Gallery 4: Living Systems

Vortex
Vortex

A twist of a knob sets water jets in motion, causing water in this giant cylindrical tank to spin. Soon, a tiny vortex appears at the surface, gradually swelling in size as it snakes downward.

Where:   Crossroads: Getting Started

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