Pegasus is marked by "The big square of Pegasus, four stars in the horse, the body that form a square whose sides are each over 10 ° degrees (the width of a fist, held up into the sky).
You can find the Square of Pegasus, the line pointer from the car by the Great Polaris, and then twice so far in Polaris' other side. One of the stars (Alpheratz) is now actually on the border in the constellation Andromeda. The other three stars are in Pegasus. All are between 2nd and 3 Magnitude. There are no brighter stars on the court.
Pegasus is the home of some weak galaxies and globular clusters (M15). M15 is easy to see in binoculars although no detail too. A telescope shows a small detail at the edges on a night with good visibility.
You must be pretty experienced to monitor variables to spot the difference that Scheat displays different brightness of only half a magnitude! Good hunting.
Minggu, 22 Juni 2008
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