Surface temperature: 10,000 degrees Fahrenheit. Composition: Hydrogen, helium.
The temperature in the Sun's core is about 27 million degrees Fahrenheit (15 million degrees Celsius) – hot enough to sustain nuclear fusion.
The temperature of the sun varies from around 27 million degrees Fahrenheit (15 million degrees Celsius) at the core to only about 10,000 degrees F (5,500 degrees C) at the surface, according to NASA.
Lava is indeed very hot, reaching temperatures of 2,200° F or more. But even lava can't hold a candle to the sun! At its surface (called the "photosphere"), the sun's temperature is a whopping 10,000° F! That's about five times hotter than the hottest lava on Earth.
The Sun does not "burn", like we think of logs in a fire or paper burning. The Sun glows because it is a very big ball of gas, and a process called nuclear fusion is taking place in its core.
The sun, by contrast, gives off its great heat and light by smashing hydrogen atoms together in its core. This is a nuclear reaction, and the process is known as nuclear fusion.
The skin pigment melanin is produced by special skin cells called melanocytes to protect the body from the damaging effects of ultraviolet light. Higher levels of melanin means less sunburn and less skin cancer.
The hottest thing in the Universe (Supernova)
Supernovas are the hottest thing in the Universe as they reach a million degrees Celsius. These explosive events occur when a star between 8 and 40 times more massive than our Sun reaches the end of its stellar lifecycle and explodes when its core collapses.
Hottest Thing on Earth: X-rays Heat Metal to 3.6 Million Degrees.
Volcanic lava can be up to 12 times hotter than boiling water.
Taking the Moon's Temperature
Daytime temperatures near the lunar equator reach a boiling 250 degrees Fahrenheit (120° C, 400 K), while nighttime temperatures get to a chilly -208 degrees Fahrenheit (-130° C, 140 K). The Moon's poles are even colder.
Many stars are much larger – but the Sun is far more massive than our home planet: it would take more than 330,000 Earths to match the mass of the Sun, and it would take 1.3 million Earths to fill the Sun's volume.
Average diameter: 864,000 miles, about 109 times the size of the Earth. Rotation period at equator: About 27 days. Rotation period at poles: About 36 days. Surface temperature: 10,000 degrees Fahrenheit.
The Sun is a lot hotter than a human, so it emits vastly more energy than a person does! In fact, it's the ratio of the temperatures raised to the 4th power. The Sun's temperature is 5780 Kelvins, and a human is 310 Kelvins.
In space or on the Moon there is no atmosphere to scatter light. The light from the sun travels a straight line without scattering and all the colors stay together. Looking toward the sun we thus see a brilliant white light while looking away we would see only the darkness of empty space.
The highest temperature ever reached under controlled conditions is an astonishing two billion degrees. It was created in the so-called Z-machine at the Sandia Laboratories, New Mexico, which uses incredibly high electric currents and magnetic fields to release radiation from atoms.
It could be fatal. It is commonly held that the maximum temperature at which humans can survive is 108.14-degree Fahrenheit or 42.3-degree Celsius. A higher temperature may denature proteins and cause irreparable damage to brain.
According to NASA, the Boomerang Nebula is the coldest spot in the known cosmos, with a temperature of one degree Kelvin. One degree Kelvin is 458 degrees Fahrenheit, or roughly 272 degrees Celsius. The lowest temperature recorded on Earth was 128.6 degrees Fahrenheit in Vostok, Antarctica.
Lightning is hot. Really hot. It can reach temperatures as high as 50,000 degrees Fahrenheit, five times hotter than the surface of the sun, and even hotter than lava here on Earth.
The temperature in a supernova can reach 1,000,000,000 degrees Celsius. This high temperature can lead to the production of new elements which may appear in the new nebula that results after the supernova explosion.
Far outside our solar system and out past the distant reaches of our galaxy—in the vast nothingness of space—the distance between gas and dust particles grows, limiting their ability to transfer heat. Temperatures in these vacuous regions can plummet to about -455 degrees Fahrenheit (2.7 kelvin). Are you shivering yet?
Black skin can warm, burn and peel when -exposed to the sun. Exposure to the sun can also cause hyperpigmentation and photoageing manifestations. The current misconceptions expressed by most black individuals about their resistance to sun-induced effects prevent their engagement in sun safe behaviours.
Compared to the rest of the body, skin on the legs does not produce the same amount of melanin, which results in legs getting less tan. Skin on the legs is thicker and harder and the UV light from the sun or sunbeds cannot easily penetrate it.
Fires can't start in space itself because there is no oxygen – or indeed anything else – in a vacuum. Yet inside the confines of spacecraft, and freed from gravity, flames behave in strange and beautiful ways. They burn at cooler temperatures, in unfamiliar shapes and are powered by unusual chemistry.