Though the sun may appear yellow or reddish to the naked eye, it's actually an ordinary white star. And the blue version released by NASA was made using a specific wavelength of ultraviolet light known as CaK, which is emitted by ionized calcium in the sun's atmosphere.
blue Sun have been made following the eruption of the Krakatoa volcano in 1883 (e.g., Larrabee, 1884; Kiessling, 1888; Symons et al., 1888).
Originally Answered: What will happen to the humans if they were under a blue sun? They would die. The color of a star is directly related to its surface temperature. From coolest to hottest, it goes red, orange, yellow, white, blue.
Blue light has a shorter wavelength than red or yellow light and shorter wavelength light is more easily scattered by gas molecules — a process called Rayleigh scattering.
Our Sun is classified as a yellow dwarf and is very much an average mid range star with a surface temperature of about 6000ºC. Blue or even blue/green stars are very hot up to 50,000ºC and are normally giant young stars which are very active or even 'hyper-active'. They are all young because they don't live very long.
Sunlight, or visible light, is made of all the rainbow colors: red, orange, yellow, green, blue, indigo, and violet.
This radiation keeps the void of space at 2.7 K, or -454 degrees Fahrenheit. This is cold by human standards, however, it is still warm enough to provide energy. A black hole can be massive enough to attract a large amount of this background radiation.
Green and purple stars do exist. The color of stars depends on their temperatures, and they emit radiation throughout the visible spectrum.
The Sun can sometimes appear as a green spot for a second or two as it is rising or setting: this is known as green flash. Roughly speaking, the red light from the Sun is blocked by Earth, the blue light is scattered by the atmosphere, and the green light is refracted by the atmosphere to the observer.
With no sunlight, photosynthesis would stop, but that would only kill some of the plants—there are some larger trees that can survive for decades without it. Within a few days, however, the temperatures would begin to drop, and any humans left on the planet's surface would die soon after.
Just over 100 years later, humans have now touched the Sun. The Parker Solar Probe became the first human-made object to venture into the Sun's atmosphere, known as the corona.
The planet is mostly swirling gases and liquids. While a spacecraft would have nowhere to land on Jupiter, it wouldn't be able to fly through unscathed either. The extreme pressures and temperatures deep inside the planet crush, melt, and vaporize spacecraft trying to fly into the planet.
In our own galaxy (the Milky Way) there are at least 300 billion stars. We call stars “Suns” when they are the centre of a planetary system, like how Earth and the other planets orbit our sun.
Even if the Earth were to survive being consumed, its new proximity to the the intense heat of this red sun would scorch our planet and make it completely impossible for life to survive. However, astronomers have noted that as the Sun expands, the orbit of the planet's is likely to change as well.
The colour blue is rarely found in nature because only a few organisms can create the true-blue pigment. The only species of animal known to produce the true-blue pigment is the Obrina Olivewing butterfly. Blue is a very prominent and beautiful colour on planet Earth.
Intense ultraviolet radiation from newly formed stars can ionise surrounding hydrogen gas, stripping away electrons and causing the gas to emit a faint pinkish glow.
Violet stars are of two temperature ranges: those whose Planckian peak wavelength lies between 380 and 450 nm, or 6700-7900 K temperature and those above the violet range in the ultraviolet that appear violet to blue in color. For example, A spectral type stars range in temperature from 7600 to 11,500 K.
Dark stars are somewhat of a misnomer — they're not actually dark. In fact, they're likely some of the biggest and brightest stars in our universe. Yet no one has ever seen one.
Every night the star puts on a light show when the same turbulence that causes it to twinkle refracts its light waves to shine in different shades. Its multicolored nature has earned Sirius the nickname "Rainbow Star."
It's a flashy rainbow star
Although white to blue-white in color, Sirius might be called a rainbow star, as it often flickers with many colors. The flickering colors are especially easy to notice when you spot Sirius low in the sky.
According to a new study, a star discovered 75 light-years away is no warmer than a freshly brewed cup of coffee. Dubbed CFBDSIR 1458 10b, the star is what's called a brown dwarf.
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?
Acute exposure to the vacuum of space: No, you won't freeze (or explode) One common misconception is that outer space is cold, but in truth, space itself has no temperature. In thermodynamic terms, temperature is a function of heat energy in a given amount of matter, and space by definition has no mass.
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.