Science, asked by vansh407966, 27 days ago

Which type of star is the sun?
A. Supernova
B. Hypernova
C. Red giant
D. Red Supergiant

Answers

Answered by crkavya123

Answer:

the correct option is D. Red Supergiant

Explanation:

Sun:

The star at the core of the Solar System is the Sun. It is a nearly perfect ball of hot plasma that has been heated by nuclear fusion processes in its centre to incandescence, with the energy it emits mostly manifesting as light, ultraviolet, and infrared radiation. The majority of the energy used by life on Earth comes from this source.

The Sun's radius is around 109 times greater than that of the Earth at 695,000 kilometres (432,000 miles). Its mass is approximately 330,000 times that of the Earth and accounts for 99.86% of the solar system's total mass. About 73% of the mass of the Sun is made up of hydrogen; the remaining 25% is largely helium, with considerably lesser amounts of heavier elements including oxygen, carbon, neon, and iron. A G-type main-sequence star, the Sun (G2V). Consequently, it is described informally and inaccurately as a yellow dwarf (its light is actually white). It originated from the gravitational collapse of materials inside an area of a massive molecular cloud some 4.6 billion years ago. The majority of this material gravitated toward the centre, while the remainder flattened into the Solar System's circling disc. The centre mass finally started nuclear fusion in its core as a result of becoming so hot and dense. This mechanism is assumed to be the primary way that stars develop.

About 600 million tonnes of hydrogen are fused into helium in the Sun's core every second, creating 4 million tonnes of energy out of the process. The Sun's light and heat are produced by this energy, which can take anywhere between 10,000 and 170,000 years to leave the core. The Sun will ultimately change into a red giant when hydrogen fusion in its core has decreased to the extent that it is no longer in hydrostatic equilibrium, causing its core to experience a notable rise in density and warmth as its outer layers expand. It is predicted that, after five billion years, the Sun would grow big enough to swallow Mercury and Venus in their current orbits and make Earth inhabitable. After that, it will lose its outer layers and transform into a white dwarf, a dense type of cooling star that no longer produces energy through fusion but continues to shine and emit heat from its prior fusion.

Since ancient times, people have understood how much of an impact the Sun has on the planet. Some cultures saw the Sun as a divinity. Some solar calendars are based on the synodic rotation of Earth and its orbit around the Sun. The Gregorian calendar, which is the most widely used calendar today, is based on the common 16th-century understanding that the Sun actually moves as observed.

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Answered by Sinthushaa

Answer:

The correct option is C "Red giant".

Explanation:

A dying star in the last phases of stellar evolution is referred to as a red giant. Our sun will become a red giant, grow, and engulf the inner planets, potentially even Earth, in around five billion years. To produce helium, stars spend the majority of their lives fusing hydrogen nuclei in their core. A star starts using hydrogen farther from its core when the hydrogen in its core runs out. The star's outer layers enlarge and cool as a result. The star expands more than 400 times in size over time. The star becomes redder and changes color as it cools. Now, the star is a red giant. Planets can be sucked up by red giants as they grow. The Sun will become a red giant in around 5,000,000,000 years.