As an expert in astrophysics, I can tell you that the concept of the "hottest star" is a bit complex because stars are classified by their surface temperatures, which can vary significantly. However, the hottest known main-sequence stars are typically of the O-type, which are blue in color due to their high temperatures. The hottest stars can reach temperatures of over 50,000 Kelvin (49,727 degrees Celsius or 90,000 degrees Fahrenheit). One of the hottest stars known is Epsilon Canis Majoris, also known as Adhara, which has a surface temperature of about 42,000 Kelvin (41,727 degrees Celsius or 76,000 degrees Fahrenheit). However, new discoveries are constantly being made, and the title of the hottest star can change with new observations.

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You can tell the temperature of a star by looking at its color. The coolest stars are red, then orange, then yellow. Even hotter stars are white and then the hottest stars are blue! The surface temperature of our sun is 5777 Kelvin.read more >>