When the sun begins the end of its life, will it be like a shining bright star in the sky?

In about 1 billion years, when the hydrogen in the Sun's core is depleted, the combustion of hydrogen will extend outward from the core, making the Sun appear brighter in the Earth's sky. This would be the end of most life on Earth, as its average surface temperature would rise from 68 degrees Fahrenheit (which is the current temperature, not taking into account any other type of global warming factor) to 167 degrees Fahrenheit. The Earth's oceans will evaporate, and the entire surface of the Earth will become a desert.

At some point in the next 1.1 billion years, the sun will be almost completely depleted of hydrogen. The core of the sun will be mainly helium, not hydrogen. When helium begins to collapse under its own weight, it becomes unstable.

The core of the sun will become denser and hotter. When this happens, the sun will expand to times its normal size and its brightness will increase to more than twice as brightness as it is now.

After about 700 million years, it won't get brighter, but it will start to grow in volume. It looks like this:

Yes, in the foreground is a Mayan ruins. )

After about 1.2 billion years, the Sun will lose more than a quarter of its mass on its outer surface as burning helium begins to form carbon.

As the mass of the Sun decreases, the gravitational pull that attracts them decreases, and the orbits of the planets will begin to change. Venus will become as far away as the Earth is now, and the Earth will be farther and farther away from us.

In about 100 million years, the Sun will be a red giant, about 166 times larger than the Sun as we know it. That's almost as big as the Earth's orbit today. Mercury and Venus will be destroyed.

Once this happens, the earth's surface will turn into lava. Judging by the Earth's current orbit, the red sun will occupy most of the sky. At the maximum size of the red giant, the temperature of the helium nucleus will reach 100 million degrees.

This temperature is enough to trigger helium fusion, and a huge amount of energy is released in the process. The sun is contracting, although at this stage it may not shrink below ten times its current level. About 110 million years will change very little in this time.

It will be like a shining star in the sky, when the sun's life begins to end, it will become a white dwarf, then after the heat is exhausted, it will become a black dwarf, and finally disappear.

No, the Sun is too large and too close to Earth, and when it begins the end of its life, Earth observation is like a giant fireball**.

Definitely yes, he kept flashing like a meteor and then until **. Swallow all the planets around you.

It could be one of metal, wood, and fire. It could also be a star.

Since planets move at a distance from Earth, there is a big difference in brightness between the dimmer and brightest.

Venus is second brightest in the night sky after the Moon, and its brightest brightness is not until before sunrise or after sunset. It appears in the eastern sky early in the morning and is called "enlightenment"; In the evening, it is on the west side of the sky and is called "Chang Gung".

Magnitude: is a measure of the luminosity of a celestial body. In order to measure the brightness and darkness of stars, the ancient Greek astronomer Hipparchus first proposed the concept of magnitude in the second century BC.

The smaller the magnitude, the brighter the star; The higher the magnitude, the dimmer its light will be. In the absence of explicit instructions, magnitude generally refers to visual magnitude.

There are 21 first-magnitude stars, 46 second-magnitude stars, 134 third-magnitude stars, 458 fourth-magnitude stars, 1,476 fifth-magnitude stars, and 4,840 sixth-magnitude stars in the sky, for a total of 6,974 stars. Brighter ones are magnitude 0 to negative magnitudes. For example, the Sun is equal, the full moon is equal in brightness, and Venus can reach so many when it is at its brightest.

It's not about putting the sun in the position of a star, because the sun itself is a star. It's about putting the sun far enough away that the sun is just a little faint star.

The Sun itself is a small mass, low-luminosity yellow dwarf star that is not very bright in itself. The Sun we see is very large and very bright because the Sun is very close to us and the other stars are very far away from us.

The brightness of a star is measured by "magnitude", and the higher the magnitude number, the darker it becomes; The lower the number, the brighter it is. There are two criteria for magnitude.

One is to see how bright the star is in the visible range at the distance where it is, which is called the "apparent magnitude" of the star. The apparent magnitude of the Sun is -26 magnitude, making it the brightest object of the day.

The other is to "place" the stars at a distance of light years (10 parsecs) and see how bright they are. This is called the "absolute magnitude" of the star. Absolute magnitude is the true brightness of a star.

The absolute magnitude of the Sun is just equal. The faintest star that the human eye can see on a night when the human eye has excellent vision, absolutely no light, and the sky is extremely clear, is about 6th magnitude, and generally only about 5th magnitude star. That is, if the Sun is at a distance of 10 parsecs, and we look at the Sun again, it is just an extremely faint little star.

No matter where you are, the sun is a star or not.

Human beings rely on the light and heat of the sun to reproduce on earth for generations. Although the sun is releasing energy all the time, it will run out one day. Scientists**, the sun may only have 5 billion years of life, and in 5 billion years the sun will become a red dwarf, light and heat have become a thing of the past, and if the sun is lost, how cold will the earth be at that time?

What will it become?

The importance of the sun.

The temperature of the earth is directly related to the sun, and the angle of sunlight has a great influence on all parts of the earth. In the summer, when the sun hits the northern hemisphere, we feel very hot, and in the winter, when the sun hits the southern hemisphere, we also reach winter. Without the sun's rays, there is no doubt that the Earth's temperature would have plummeted.

What will happen to the Earth's temperature?

According to the current data, the average temperature of the earth is 15 degrees Celsius, if the lack of sun irradiation, it means that the earth and the sun are getting farther and farther away, at this time the earth will slowly run into the orbit of Mars, the temperature of Mars is about minus 50 degrees Celsius, and the temperature of the earth at this time is still higher than that of Mars.

Then the Earth remained away from the Sun at this rate, and at this time it was in orbit with Saturn, kilometers from the Sun. The temperature on Earth is no longer suitable for human life. The environment of the satellite Titan is very similar to that of Earth, with an atmosphere far behind that of Earth, but a surface temperature of minus 180 degrees Celsius.

Therefore, at this time, the Earth will also have the same temperature as Iapetus, and any life will immediately freeze into a sculpture.

At this time, the Earth still has an atmosphere, but if the Earth is still far from the Sun and orbits Pluto, it means that the Earth will soon enter a hellish temperature. Pluto's temperature has reached minus 200 degrees Celsius, and if the Earth's temperature also reaches minus 200 degrees Celsius, it means that the thick atmosphere will be frozen into solids, and how can life be born?

What will happen to humans?

Will humanity still be able to survive on Earth at that time? Some people believe that if human beings want to continue to live on the earth, they might as well go to the inner world of the earth, although the surface temperature has dropped to minus 200 degrees Celsius, but the interior of the earth has an extremely high temperature, and the core temperature of the core of the earth can reach 6000 degrees Celsius. If human beings at that time could resist the high temperature and go underground to survive, they could use the thermal energy underground to survive this cold winter.

Therefore, it has been argued that even if the earth lacks the sun's light and heat, it does not affect the earth's internal temperature. If life wants to continue to survive, it might as well enter the inner world and open up new fields, what do you think?

Without the sun's rays, life on Earth would have disappeared, and even if some creatures could last for a while, they would eventually become extinct.

The Earth will become similar to the Moon. Without the sun, all kinds of life on the earth will gradually die and disappear, and there will be no oxygen, and there will be only rocks like the moon, which is very cold.

The earth will be in darkness every day, flowers and plants will not grow, the sky will no longer be blue, and animals will be on the verge of extinction. Humanity will also go to the point of extinction. There will be no more life in this world.

The earth will be darkened. All living things are out of life. Humans can't survive normally. The earth will be left with nothing.

The earth will be plunged into endless darkness, and I think it will be too, and we will also be in a panic.