- A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M☉)) in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius large and the surface temperature around 5,000 K (4,700 °C; 8,500 °F) or lower. The appearance of the red giant is from yellow-white to reddish-orange, including the spectral types K and M, sometimes G, but also class S stars and most carbon stars.
- Tyre (whc.unesco.org)
According to legend, purple dye was invented in Tyre. This great Phoenician city ruled the seas and founded prosperous colonies such as Cadiz and Carthage, but its historical role declined at the end of the Crusades. There are important archaeological remains, mainly from Roman times.