The sculpture consists of an eight inch diameter aluminum sphere magnetically levitated above a walnut disc.

The OBS consists of an aluminum sphere which contains sensors, electronics, enough alkaline batteries to last 10 days on the ocean bottom, and an acoustic release.

The central aluminum sphere of the sculpture represents "the opaque surface beyond which we can't see," he said.

If forces are equal at the outset, the gold sphere will have a smaller acceleration than the aluminum sphere because of the density difference.

A one-centimeter aluminum sphere traveling at 22,000 miles an hour would strike a spacecraft with the energy of a 400-pound weight striking the ground at 60 miles an hour.

The room was dominated by a large aluminum sphere seven feet in diameter, with a number of electrodes and cables running around the outside.

His most recent installation pieces include beautiful aluminum spheres, ball bearings writ large and ready to roll.

A tiny aluminum sphere could harbor the energies of an exploding hand grenade.

Terrestrial Physics involves a polished aluminum sphere that is attached to a cylindrical glass tube coupled with rings of copper.

Instruments were packed into two aluminum spheres capable of withstanding pressures at a depth of three miles.