** WHAT: Fourth annual University of Washington astronomy open house
** WHO: Faculty and staff of the UW Astronomy Department
** WHEN: Saturday, April 20, 4 p.m. to 8 p.m.
** WHERE: Physics-Astronomy Building on the UW Seattle campus
DETAILS: The astronomy open house this year occurs on International Astronomy Day and comes during a major planetary conjunction. Five planets — Jupiter, Saturn, Mars, Venus and Mercury — will line up in the western sky, with a crescent moon supplying illumination. Public observation of the celestial light show will run from 8 p.m. until 10 p.m., weather permitting.
Open house events include:
> A simulated voyage through the solar system.
> Planetarium shows.
> A tour of the historic campus observatory.
> Demonstrations on subjects such as the making of comets.
> A variety of faculty presentations covering topics such as the formation of the solar system and acceleration of the universe.
The Physics-Astronomy Building is on the UW campus, at 15th Avenue Northeast and Northeast Pacific Street. Enter the UW parking garage from 15th Avenue Northeast at Northeast 41st Street.
For more information, contact the UW Astronomy Department at (206) 543-2888.