The Sun is a typical middle aged star, and its current age is about that

About 5 billion years.

The Sun is an ordinary star that currently spends about half of its main-sequence career on Her-Roth. It is a sphere of hot gas (strictly speaking plasma) with a mass of 100 billion tons (about 330,000 times the mass of the Earth) and a diameter of 10,000 km (about 109 times the diameter of the Earth). Its average density is times that of water, but this average density implies a wide range of densities, from ultra-dense cores to thin outer layers.

As a stellar star, the Sun has a luminosity of 38.3 trillion trillion watts and an absolute magnitude, and it is a yellow G2 dwarf star with an effective temperature equal to 5800 degrees Kelvin. The average distance between the Sun and the Earth orbiting it is 149,597,870 km (light seconds or 1 astronomical unit). By mass, its material composition is 71% hydrogen, 26% helium and a small amount of heavy elements.

The angle of the Sun's circle in the sky is 32 arc minutes, which is very close to the angular diameter of the Moon as seen from the Earth, and is a wonderful coincidence (the Sun is about 400 times the diameter of the Moon and exactly 400 times the distance from us), making the eclipse look particularly spectacular. Since the Sun is much closer to us than other stars, its apparent magnitude is reached, making it the brightest object seen on Earth. The Sun rotates once a day (average period; The equator rotates faster than at high latitudes) and orbits the center of the Milky Way once every 200 million years.

The Sun is slightly flattened by its rotation and is in a perfect spherical shape, equivalent to 6 km from the equatorial radius to the polar radius (21 km on Earth, 9 km on the Moon, 9,000 km on Jupiter, and 5,500 km on Saturn). Although the difference is small, it is important to measure this flatness, because any slightly larger flattening (even if it would alter the effect of the Sun's gravity on Mercury's orbit and make the test of general relativity based on Mercury's perihelion precession untrustworthy.

Basic physical parameters of the sun.

Radius: 696295 km.

Mass: kg.

Temperature: 5800 surfaces) 15.6 million (cores) Total radiant power: Joules seconds.

Average density: grams of cubic centimeters.

Average distance between the Sun and Earth: 150 million km.

Age: Approximately 5 billion years.

The Earth is 4.7 billion years old, the Sun is 5 billion, and it will take another 5 billion years to change it.

4.7 billion, is a healthy young star.

The planetary system of the solar system was formed about 5 billion years ago, and the formation of the earth and chemical evolution 4.6 billion years ago.

The age of the current base of the Sun is about (Brother Bo) years.

5 billion (correct answer).

3 billion. 10 billion.

Billions of scattered years (correct answer to the case of the dust jushi).

Hundreds of millions of years to answer the difficulty. Years. 100 million years.

Correct] A [Analysis of the Bridge and Sail of the Pavilion] The Sun is a hail body in the solar system with a diameter of l392000km, and it is the closest star to the Earth and the most closely related to the Earth.

Aside from the Sun, the closest star to us is Proxima Centauri in the constellation Centauri, about light-years away from us.

The Sun is now in middle age or prime of life, in the middle of stellar evolution, called the main-sequence stage.

The Sun is a low-mass yellow dwarf star located at the lower middle of the main sequence in the Harrow diagram, where it has been staying for about 5 billion years and is slowly moving upwards as hydrogen fuel is consumed. According to stellar evolution models, the Sun was 87% of its current volume when it was first born, and its surface temperature was about 600 degrees higher than it is today. Also according to the stellar evolution model, the Sun will remain in the main sequence for about 4.55 billion years before entering old age, expanding in size, leaving the main sequence and entering the red giant region.

Therefore, the Sun is currently a main-sequence star and is in the middle prime of stellar life.

The sun also has an age, and if we draw an analogy to humans, what stage is the sun in now?

a.Juvenile. b.Prime.

Correct answer: B

The Sun is currently in its prime, known astronomically as the "main-sequence star" phase.

The Sun is a yellow dwarf (spectrum G2V), the lifespan of a yellow dwarf is roughly 10 billion years, and the Sun is currently about 100 million years old. In about 5 to 6 billion years, the Sun's interior will be almost completely depleted of hydrogen, and the Sun's core will collapse, causing the temperature to rise, a process that will continue until the Sun begins to fuse helium into carbon. Although helium fusion produces less energy than hydrogen fusion, it is also hotter, so the outer layers of the sun will expand and release a portion of the outer atmosphere into space.

At the end of the process of turning to new elements, the mass of the Sun will decrease slightly, and the outer layers will extend to the current orbit of the Earth or Mars (in which case the two planets will be farther away from the Sun due to the decrease in the mass of the Sun).

Summary. Kiss <>

We'll be happy to answer your questions<>

The Earth is located in the position of Venus, and the solar constant is 2640W. Most of the planetary orbits in the solar system are near-circular orbits, which can be estimated in terms of circles. If the radius of the Earth's orbit is 1, then the orbit of Venus is, and Mars is, so the solar constant of Venus's orbit is times that of the Earth's orbit, and the solar constant in Mars' orbit is 43% of that of the Earth.

If the Earth is in the position of Venus, what is the solar constant?

Kiss <>

Very Sun Yaomo is happy to answer for you<>

The Earth is located in the position of Venus, and the Sun is usually 2640W. Most of the planetary orbits in the solar system are near-circular orbits, which can be estimated in terms of circles. If the radius of the Earth's orbit is regarded as 1, then the orbit of Venus is, and Mars is, so the solar constant of Venus's orbit is a double of the Earth's orbit, and the solar constant in Mars' orbit is 43% of that of the Earth.

Kiss <>

Venus is the second brightest celestial body in the night sky after the Moon, and its apparent magnitude can be reached by a handtool, enough to cast a shadow on the ground. Since Venus is an inner planet on the inner side of the Earth, it never orbits far from the Sun: its maximum separation is .

Venus is a terrestrial planet similar to Earth and is often referred to as Earth's sister star. It has the thickest atmosphere among the four terrestrial planets in the solar system, in which more than 96% of the fission is carbon dioxide, and the atmospheric pressure on the surface of Venus is 92 times that of Earth.