The Weather Blog

November 12, 2009|By Frank Roylance | Frank Roylance,frank.roylance@baltsun.com

Joe Bollinger writes from Glen Burnie: "What does the number +.5 mean with regard to a planet's magnitude?" The magnitude scale is a measure of an object's apparent brightness. Numbers run from negative digits (brightest), through zero, to positive digits (dimmest). The full moon is -12. Venus can reach -3.8. The North Star is a +2. The dimmest naked-eye objects visible under ideal conditions are +6.5.

Up-to-the-minute local data and radar at marylandweather.com

Baltimore Sun Articles
|
|
|
Please note the green-lined linked article text has been applied commercially without any involvement from our newsroom editors, reporters or any other editorial staff.