Because it takes almost the same time to rotate once on its axis, as it takes to revolve once around the sun.
Mercury
Mercury's surface temperature varies greatly depending on its location on the planet. It can range from about 800 degrees Fahrenheit (430 degrees Celsius) on the side facing the Sun to -290 degrees Fahrenheit (-180 degrees Celsius) on the side facing away from the Sun.
At the equator, the surface temperature on Mercury can range from -173°C to 430°C, while temperatures at the poles can plummet to around -193°C. The mean surface temperature is 67°C
This is pretty close to the temperature range on the surface of the planet Mercury. Cold at night, hot during the day.
It does not! The temperature range is -190 to 430 degrees C.
It does not! The temperature range is -190 to 430 degrees C.
According to Wikipedia, The surface temperatures on Mercury range from about 90 to 700 K (-183 °C to 427 °C)
The hottest temperature recorded on Mercury was around 800 degrees Fahrenheit (430 degrees Celsius). This extreme heat is due to the planet's close proximity to the sun and its lack of a significant atmosphere to regulate temperatures.
Mercury has the most extreme temperature range in the solar system, with temperatures ranging from about 800 degrees Fahrenheit on the side facing the Sun to about -290 degrees Fahrenheit on the side facing away from the Sun.
At the equator, the surface temperature on Mercury can range from 100K (-173'C) to 700K (430'C). This is due to a very long apparent day length, from a combination of the time taken to orbit and the planets axial rotation.
The temperature range of the planet Mercury is from 350 degrees in the daytime to 170 degrees at the nigh-time. The temperature range of the metal mercury is from −38.83 °C to 356.73 °C.
The temperature range is very great -- temperatures on the surface of Mercury range from -300 degrees Fahrenheit up to 800 degrees Fahrenheit. There is no substantial atmosphere there, so there is no pressure nor air at the surface.