Polaris, Alpha Ursae Minoris, Doubí to the Phoenicians and
Alruccabah (Help) for the Arabs.
He drove for centuries sailors, travelers and caravans, however, remains an interesting object for amateur astronomers and amateur astronomers: it is a double star that can be seen by telescopes from 6 cm up.
between the two stars is a distance of separation 18''che is pretty high, because the actual distance is about 2000 times the distance from the earth and the sun, but it is not always easy to see the second given the strong difference brightness.
William Herschel was to locate it in 1780.
The orbital period of the two stars is, as yet, changed by only 4 °, then it means that many thousands of years.
Polaris object is actually a triple but the third object is not visible.
0 comments:
Post a Comment