International Dark Sky Week runs from Monday through Saturday. It was conceived by a high school student in 2003 to call attention to the problem of light pollution.
In addition to longer-than-usual hours to allow for stellar night sky viewing, many of Michigan's participating parks will host astronomy-themed events.
Besser Planetarium in Alpena County will host a program Friday, followed by sky viewing at Rockport Harbor.
Lake Hudson Recreation Area in Lenawee County and Ludington State Park in Mason County will have programs Saturday.
For a list of state parks and recreation areas open for night sky viewing this week, see http://www.michigan.gov/stateparks .