The temperature of space varies depending on the location and the presence of matter and radiation. In a truly empty region of space, there would be no particles and radiation, meaning there’s no temperature. However, space is not empty and is filled with particles and radiation that produce heat and a temperature. The baseline temperature of outer space, as set by the background radiation from the Big Bang, is 2.7 kelvins (-270°C/-455°F) . This is known as the cosmic microwave background (CMB) and it has a uniform temperature of 2.7 K. The gas temperatures in outer space can vary widely, for example, the temperature in the Boomerang Nebula is 1 K, while the solar corona reaches temperatures over 1.2–2.6 million K. The average temperature of outer space near Earth is 283.32 kelvins (10.17 degrees Celsius or 50.3 degrees Fahrenheit) . The temperature in space depends on many factors, such as distance from a star or other cosmic event, whether a point in space is in direct light or shade, and if it is subject to a solar flare or solar wind. The coldest place in the universe is the Boomerang Nebula, which has a temperature of one degree Kelvin, which is only one degree warmer than absolute zero or zero on the Kelvin scale.