| |
| | Dubhe (Site not responding. Last check: 2007-10-09) |
 | | Dubhe, however, is not a part of the system (nor is Alkaid), and is half again as distant, 124 light years, and the most distant of the Dipper stars. |
 | | As a class K giant with a temperature of 4500 Kelvin, it is also the coolest of them (its orange color easily noted), and the only one that is evolved and in the long process of dying, though for now it is temporarily stabilized by the fusion of helium in its core. |
 | | With a luminosity 300 times that of the Sun, Dubhe is the second most luminous of the seven stars, topped only by hot Alkaid, the luminosity and temperature implying a radius 30 times solar. |
| www.astro.uiuc.edu /~kaler/sow/dubhe.html (463 words) |
|