What do stars evolve into in late middle age?

Stellar mid-life forms red giants.

Supergiants. After a star has been formed for millions to hundreds of billions of years, the star consumes the hydrogen in its core. Massive stars will deplete their cores of hydrogen faster than their smaller ones.

After the hydrogen in the core is consumed, the nuclear reaction in the core stops, leaving behind a helium nucleus. After losing the energy of the nuclear reaction against gravity, the outer shell of the star begins to collapse gravitationally. The temperature and pressure of the core are elevated as during star formation, but at a higher level.

Once the temperature of the core reaches 100 million degrees Kelvin.

The core begins to undergo helium fusion, re-passing nuclear fusion.

Energy is produced to resist gravity. The star is not massive enough to produce helium fusion to release heat energy, which gradually cools down and becomes a white dwarf.

The core of the accumulated heat causes the star to expand dramatically, reaching hundreds of times the size of its main sequence stage, becoming a red giant. The red giant phase lasts millions of years, but most red giants are variable and not as stable as main-sequence stars. The next evolution of a star is once again determined by the mass of the star.

The late stage of starry, decaying phase death ends with one of three possible cold states: white dwarfs, neutron stars, and black holes.

The one with a small mass first becomes a red giant star and then a white dwarf, and the one with a large mass first becomes a supernova and then a neutron star, and the probability of becoming a black hole is smaller.

The evolution of stars is mainly divided into four periods, namely juvenile, prime, recession and death. Stars are actually macroclouds at the beginning, and in the initial stage, they are obscured by dense nebulae gas and dust, which are difficult to observe, and are called Bock spheroids. After that, the central temperature of the spherical object will be particularly high, allowing the star to begin to emit light on its own, reaching a static equilibrium.

Over time, the stars enter the middle age of the stars, forming red giants and supergiants. In recessions, stars die and may become neutron stars or black holes.

During the red giant phase, the matter inside the planet no longer undergoes thermonuclear reactions, but because the pressure on the core of the outer shell increases, it will cause other shape changes. Physics connects the internal motion of stars and the production of energy, and a change in one factor causes a change in the whole. The gas is in motion, and this movement continues under the influence of gravity, and the first stars are formed.

In the middle stage, there will be a nuclear reaction inside, and after one reaction will be completed, another reaction will begin, until all the fuel is exhausted. In the final fateful stage, perseverance still collapses or erupts under the influence of gravity, which may cause some to become nebula gas, and another part to become various other celestial objects, such as white dwarfs.

The material of most stars is gaseous, and the effect of heat conduction is not very large, so the interior is very hot. In the final stage of evolution, a small feather can cause a change in gravity, shrink stars, and cause giant molecular clouds to collide constantly. At this time, it is possible to start a non-stop explosion, causing some high-speed material to be thrown out of the star.

After that, the megamolecular cloud fragments will be broken down into smaller pieces and will drift through the universe. So the life of a star actually has a program, it seems to be very short, and the evolution time is very long, much more than the lifespan of humans.

Massive stars undergo several great changes in the process of collapsing, which is what we call a supernova explosion.

Planets are born in nebulae, and cosmic dust attracts each other under the action of gravity, gathers, and the heat generated by extrusion gradually accumulates, and finally ignites the gathered matter, and the glorious life of the star is born.

1.The first stage is the birth of stars (juvenile years);

2.The second stage is the Lunar Week (the prime of life), in which most of the stars in the universe are located; When a star becomes a red giant, it enters the third stage;

3.Eventually, the star enters an explosive phase, slowly collapsing and dying out.

It is divided into 4 periods. These 4 periods are the main sequence phase, the star phase, the red giant phase, and the white dwarf phase.

The hydrogen inside the star is depleted, and the outer shell without the support of nuclear fusion is squeezed inward under the strong gravitational force, and the helium produced by nuclear fusion is accumulating, and the helium gathered together finally fuses, and the decrease in temperature makes the star color red, and the energy of helium fusion extrapolates the outer layer of the star to form a red (super)giant.

Stars are still normal stars in middle age and are called "main-sequence stars".

From the moment a star is born, it appears on the main sequence of the Hérau diagram and becomes a main sequence star. It then slowly moves upwards on the main sequence, slowly increasing in volume and luminosity, and slowly decreasing in surface temperature.

More than 90% of a star's life is in the main sequence until old age.

When the star reaches old age, it quickly leaves the main sequence and moves vertically upwards in the Herrault diagram into the red giant region in the upper right. At this point, it expands into a red giant or red supergiant.

Therefore, the star is still a normal star in middle age compared to young age.

The Sun is currently in middle age and is a normal main-sequence star.

Harrowtu.

There are many stars in the cosmic environment as we know it at present, and it is one of the largest groups in the universe, which is also quite concerned by scientists. Among the stars, there are neutron stars, white dwarfs, and so on. And that's not what we're going to talk about today, it's black dwarfs!

1. Stars will evolve into red giants in middle age, red giants are a shorter unstable phase experienced by stars in the later stages of burning, which lasts only millions of years depending on the mass of the star, which is very short compared with the stable period of billions or even tens of billions of years of stars.

2. Stars are spherical luminous plasmas condensed by gravity, and the Sun is the closest star to the Earth. Almost all of his stars that can be seen at night when the Earth grinds are in the Milky Way, but due to their distance, they seem to be just fixed points of light.