The temperature scale originally based on the freezing and boiling points of water at sea level is the Celsius scale. Named after Swedish astronomer Anders Celsius, the scale sets 0 degrees Celsius as the freezing point and 100 degrees Celsius as the boiling point of water at standard atmospheric pressure. This makes the Celsius scale particularly intuitive for everyday use and scientific applications involving temperature measurement. It is widely adopted around the world and is utilized in most countries, contrasting with the Fahrenheit scale commonly used in the United States.