Will the sun get bigger Please, everyone, 3Q

It's going to get bigger, and its expansion is going to bring about the destruction of the solar system again.

Remember.

We all know the sundial - it was the first tool used by the ancients to calculate time without a watch. Now, let's use a sundial as a metaphor for the life of the sun: Suppose the sun is born at 6 o'clock in the morning and dies at 6 o'clock in the evening, then, at 7 o'clock in the morning, the earth is born; At ten o'clock in the morning, life came to life on the earth; At 10:20, the dinosaur was born; At 10:36, humanity was born; At the age of the sun, we are now living less than a second.

The hydrogen fuel inside the sun is burning so much that it is getting hotter and hotter, and at 11:30 a.m., a billion years from now, the average temperature on the Earth's surface will reach 160 degrees Celsius. Carbon dioxide disappears quickly with high temperatures, with plants suffering first, followed by animals, and then humans. We only had two options then:

Either stay at home during the day and move thousands of meters underground at night; Or move to other planets. Around 5 p.m., the sun will run out of hydrogen fuel and be replaced by hotter helium. As the pressure inside the Sun increases, the inside will push the outside outward, and at this time, the Sun expands dramatically and becomes a "red giant".

Starting with Mercury, the Sun will engulf the eight planets one by one. But as the volume increases, the interior becomes vacant, and the gravitational pull of the sun decreases. Maybe the earth can escape the fiery apocalypse, but even then, the surface of the earth is already a mess.

It's 6 o'clock. Because the Sun is not large enough, it cannot become a supernova after **. Eventually, the Sun shrunk into a white dwarf the size of the Earth.

This is the life of the sun, our future.

Under the blazing sun, a day or two is fine, don't try it, because it's not easy to turn white when it's black, I've tried, so I'm very dark.

An hour can be very dark, a few days ago I went to Shenzhen, did not apply sunscreen, less than an hour of tan, it is black and red, and it will hurt, in stark contrast to not getting the sun, the next day it will all be black. Also, sunscreen oil must be applied before the sun!

Slow drying, it's always dark. However, strong direct light is not good for **.

- -Ultraviolet rays are not good for ** If you want to sunshine, it will turn black in 2 hours.

Some people tan easily, and some people tan for a long time, depending on how good or bad it is.

The sun doesn't die. Only disappear. When the fuel runs out, the sun disappears.

The Sun has reached middle age in its main-sequence phase, during which the stellar nucleosynthesis reactions that occur inside its core fuse hydrogen into helium. At the core of the Sun, more than 4 million tons of matter can be converted into energy every second, generating neutrinos and solar radiation. At this rate, the Sun has so far converted about 100 Earth-mass matter into energy.

The time when the Sun is the main-sequence star lasts about 10 billion years. The mass of the Sun is not massive enough to explode into a supernova. In 5,06 billion years, when the Sun's hydrogen is depleted, the core is dominated by helium atoms, and the Sun will transform into a red giant, expanding its outer layers when the hydrogen in its core is depleted, causing the core to shrink and the temperature to rise.

When its core temperature rises to 100,000,000 K, helium will fuse to produce carbon, which will enter the asymptotic giant branch, and when all the helium in the Sun is converted to carbon, the Sun will no longer shine and become a dead star (Black Dwarf). The ultimate fate of the planet is not yet known. When the Sun becomes a red giant, its radius can exceed 1 AU, which is 260 times the current radius of the Earth beyond the Earth's current orbit.

However, by then, as an asymptotic giant branch star, the Sun will lose about 30% of its current mass due to stellar winds, and the planet's orbit will be extrapolated. For that reason alone, the Earth may be spared from being swallowed by the sun. However, new research suggests that the Earth will still be swallowed by the sun due to the effects of tidal action.

Even if the Earth could escape the fate of being melted by the Sun, the water on Earth would evaporate and the atmosphere would escape. In fact, even when the Sun is still a main-sequence star, it gradually becomes brighter and the surface temperature rises slowly. The rise in the sun's temperature will cause the Earth's surface to rise in 900 million years, making life as we know it impossible to survive.

In another 1 billion years, the water on the Earth's surface will disappear completely. After the red giant phase, the intense pulsations generated by the heat throw off the Sun's outer shell to form a planetary nebula. All that remains after losing its shell is the extremely hot stellar core, which will become a white dwarf, slowly cooling and dimming over a long period of time.

This is typical of the evolution of low- and medium-mass stars [4] .

The principle of tanning, which is how melanin is formed. When irradiated by heat or sunlight**, melanocytes located within the basal lamina are excited and activated, and they are present in a 10:1 ratio within the basal cells, which have a dendritic shape and shuttle through the epidermal cells.

Melanocytes contain pigment granules, which synthesize melanosomes in the crude endoplasmic reticulum, which catalyzes a series of tyrosine reactions and generates melanin proteins, while tyrosinase will be inactive and act as a transporter to transfer them to keratinocytes. The more melanin is transferred to keratinocytes, the darker the skin tone. After people of the same skin color are also exposed to the same amount of sunlight, why are some people tanned and some people's ** has not changed much?

This has to do with a number of factors. It mainly depends on how much melanin is produced and how much melanin is transferred to keratinocytes, that is, the more melanin is produced and the more it is transferred to keratinocytes, the darker the skin tone, and vice versa.

One moon means level 4, one star means level 1, and one sun means four moons.

4 stars = a moon 4 moons = a sun 16 stars = 1 sun.

3 moons and 4 stars will do.

A moon is magnitude 4, the sun is magnitude 16, and it can be lit at 4 moons.

When it dawns in 4 months, it becomes 1 sun.

Hello! Mainly because of the absorption of melanin by the human body! It is recommended that you can bask in the sun appropriately, not too long, and it is forbidden to be exposed!

If it's dark, you can protect it**, otherwise those ultraviolet rays will kill people.

The wavelength of UVA in ultraviolet rays is 290 320 nanometers, which has the characteristics of being able to penetrate **, when UVA penetrates into our body, **will produce allergic reactions, at this time, the melanin in the cells, the vitality will become very vigorous, and it will spread to all corners of the cells to form a protective film, so that UVA can not enter our **. Therefore, ** will turn black after being exposed to the sun because of the diffusion of melanin!