Figure 18-21: R I V U X G
The Pleiades and Its H-R Diagram (a) The Pleiades star cluster is 117 pc (380 ly) from Earth in the constellation Taurus and can be seen with the naked eye. (b) Each dot plotted on this H-R diagram represents a star in the Pleiades whose luminosity and surface temperature have been measured. (Note: The scales on this H-R diagram are different from those in Figure 18-18b.) The Pleiades is about 50 million (5 × 107) years old.
The Pleiades and Its H-R Diagram (a) The Pleiades star cluster is 117 pc (380 ly) from Earth in the constellation Taurus and can be seen with the naked eye. (b) Each dot plotted on this H-R diagram represents a star in the Pleiades whose luminosity and surface temperature have been measured. (Note: The scales on this H-R diagram are different from those in Figure 18-18b.) The Pleiades is about 50 million (5 × 107) years old.
(Australian Astronomical Observatory/David Malin Images)