Heavy elements are only produced in supernovae, so all of us carry the remnants of these distant explosions within our own bodies. Supernovae add enriching elements to space clouds of dust and gas, further interstellar diversity, and produce a shock wave that compresses clouds of gas to aid new star formation.

Although they would be spectacular to look at, were these “predictable” supernovae to occur, they are thought to have little potential to affect Earth. It is estimated that a Type II supernova closer than eight parsecs (26 light-years) would destroy more than half of the Earth’s ozone layer.

Explanation: Other elements up to Iron in periodic table were cooked up in the core of stars due to fusion..But heavier elements were made in supernova explosions of massive stars.. So most elements on earth is the result of a supernova. With out Sun and heavy elements there will not be any life on Earth.

Phosphorous — one of the essential elements for life — has been discovered in the cosmic leftovers from a star explosion for the first time, scientists say. The second discovery by a second team of scientists found traces of argon gas in a distant nebula. …

Catching a supernova would be a rare and amazing sight: such explosions can shine more brightly than an entire galaxy. Molnar thought he’d found two stars about to explode as a red nova in 2017 — the system KIC 9832227 — which he predicted would happen around 2022.

It’s a balance of gravity pushing in on the star and heat and pressure pushing outward from the star’s core. When a massive star runs out of fuel, it cools off. This causes the pressure to drop. The collapse happens so quickly that it creates enormous shock waves that cause the outer part of the star to explode!

Stars die because they exhaust their nuclear fuel. Really massive stars use up their hydrogen fuel quickly, but are hot enough to fuse heavier elements such as helium and carbon. Once there is no fuel left, the star collapses and the outer layers explode as a ‘supernova’.

A supernova — specifically, a core-collapse supernova — can only occur when a star many times more massive than our Sun runs out of nuclear fuel to burn in its core. When our Sun runs out of hydrogen fuel in the core, it will contract and heat up to a sufficient degree that helium fusion can begin.

White stars are hotter than red and yellow. Blue stars are the hottest stars of all. Stars are not really star-shaped.

blue

Spectral types are named with a letter. The seven main types are M, K, G, F, A, B and O. M stars are the coldest stars and O stars are the hottest.

red

1 : a star of spectral type A or F having a moderate surface temperature and a white or yellowish color. 2a : an annual morning glory (Ipomoea lacunosa) of the southern U.S. with star-shaped leaves and small white or purplish flowers. b : a bellflower (Campanula carpatica alba) with white flowers.

hot blue stars

Sirius

Mira is hotter and bluer but intrinsically fainter than the Sun.

All stars are white because they emit all wavelengths. Having said that their temperatures mean that they will have a bluer or redder tint, so their spectral class will be red, orange, yellow, yellow-white, white blue-white and blue (Classes M (orC&S), K, G, F, A, B & O).

People with good color vision acuity can see traces of color in a few of the brightest stars, but most stars appear white. If we see the object in a large enough telescope or we photograph the object long enough we will collect enough light to see these colors.

The reason most stars appear white to us is because we have two different kind of light sensors in our eyes. Sensors called “rods” detect brightness, while sensors called “cones” detect color. The cones are not very sensitive, so if a light is too dim they are not activated, and we perceive the color as white.

Stars vary in colour ranging from orange through true white to blue. Colour is caused by the temperature of the surface of the star. Our Sun is classified as a yellow dwarf and is very much an average mid range star with a surface temperature of about 6000ºC.

But the hottest known stars in the Universe are the blue hypergiant stars. These are stars with more than 100 times the mass of the Sun. One of the best known examples is Eta Carinae, located about 7,500 light-years from the Sun.

If you look up into the night sky you may be able to see a few thousand stars from a dark site. As the stars are all so distant they appear as points in the sky. Most appear white but a few stars such as Antares and Betelgeuse have an orange or reddish hue to them. Others such as Rigel suggest a bluer colour.

The color of the sun is white. The sun emits all colors of the rainbow more or less evenly and in physics, we call this combination “white”. That is why we can see so many different colors in the natural world under the illumination of sunlight.

tl;dr: The theory to explain this is the sun just underwent some kind of torsion and is no longer a yellow dwarf star. This has some bonus creepy conspiracy vibe because it might mean carbon dating is wildly inaccurate if the sun can change forms so flippantly.

It is a common misconception that the Sun is yellow, or orange or even red. However, the Sun is essentially all colors mixed together, which appear to our eyes as white. This is easy to see in pictures taken from space. Each color in the rainbow (red, orange, yellow, green, blue, violet) has a different wavelength.

How much of the Sun’s visible light will reach your eyes, will vary depending on your location, the time of day and the constituents of the atmosphere through which the Sun’s light is passing. But it is safe to say that the Sun will look brighter from space. In space, there is nothing between your eyes and the Sun.

The International Space Station travels at a brisk 17,100 miles per hour. That means it orbits Earth every 90 minutes—so it sees a sunrise every 90 minutes. Thus, every day, the residents of the ISS witness 16 sunrises and 16 sunsets.

Originally Answered: In the same sky, why does the Moon appear white, and the Sun is yellow? The moon rocks absorb the wavelengths that give us a yellow Sun, making it white as it reflects.