Massive compact halo objects
as dark matter candidates

What does ``massive compact halo object'' mean?

A strategy for looking for MACHOS.

We need to know about gravitational lenses.

A MACHO could act as a gravitational lens. When it passes in front (or almost in front) of a background star, it could focus the light from that star, making it seem brighter for awhile.

There is an experiment to look for this.

Davison E. Soper, Institute of Theoretical Science, University of Oregon, Eugene OR 97403 USA soper@bovine.uoregon.edu