A pulsar (short for pulsating radio star) is a highly magnetized, rotating neutron star that emits a beam of electromagnetic radiation.
Tourmaline is the most colorful of all gemstones. It occurs in all colors, but pink, red, green, blue and multicolored are its most well-known gem colors. Scientifically, tourmaline is not a single mineral, but a group of minerals related in their physical and chemical properties.
Flag of France. The flag of France is being referred to as the tricolor. Its history goes back from the time of the French Revolution. It consists of three colors, namely royal blue, white and red. Although there are many different flags that exist, the most popular is the blue shield and yellow lilies with white background.