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The Sun
The Sun is the star at the center of our solar system. It provides our planet with light, warmth, and energy.
2,069 Questions
Sunspots can be observed on the surface of the Sun. They appear as dark, cooler areas compared to their surroundings due to magnetic activity suppressing convection. Sunspot activity follows an 11-year cycle and can be observed using solar telescopes equipped with proper filters for safe viewing.
What are the parts of the sun and their function?
There is not really a "surface" to the Sun. Think of it this way: the Sun is a bunch of gas which gets denser and denser as you move from space toward the solar core. The photosphere would then represent the depth at which we can see no deeper toward the core. Think of what a thick cloud looks like when you look down on it from an airplane - it looks solid, but it isn't.
The Parts of a Star
The Sun's atmosphere changes from being transparent to being opaque over a distance of only a few hundred kilometers. This is remarkable given the size of the Sun, and represents such a huge change that we often think of it as a true boundary. When we speak of the size of the Sun, we usually mean the size of the region surrounded by the photosphere. The photosphere is slightly different from one place on the Sun to another, but in general is has a pressure about a few hundredths of the sea-level pressure on Earth, a density of about a ten-thousandth of the Earth's sea-level atmospheric density, and a temperature in the range 4500-6000 Kelvin.
The ChromosphereThe gases which extend away from the photosphere make up the chromosphere. These gases are transparent to most visible radiation. The chromosphere is about 2500 km thick. The density of the gases decreases as you move away from the photosphere into the chromosphere, but the temperature increases! From the bottom to the top of the chromosphere, the average temperature goes from 4500 to 10,000 Kelvin! Needless to say, this rise was not anticipated by scientists when they first measured it. Throughout the rest of the Sun, temperature decreases as you move further away from the core.The Solar Corona seen during
a total eclipse
The CoronaThe chromosphere merges into the outermost region of the Sun's atmosphere, the corona. The corona extends for millions of miles into space above the photosphere. Usually, we cannot see the corona because of the brightness of the photosphere. However, during a total solar eclipse, the corona shines beautifully against the dark sky. The corona has a density about 0.0000000001 times that of the Earth's sea-level atmosphere. It is very hot - millions of Kelvin. Because of this high temperature, the bulk of the radiation from the corona is emitted atultraviolet and X-ray wavelengths. Magnetic fields on the Sun seem to play an important part in heating the gas to such a high temperature. However, the exact way that this happens is not well understood. The image you see to the left was taken during a solar eclipse in 1980; lightfrom the photosphere is blocked out by the Moon (the dark disk). A Few Other Solar FeaturesThe Solar WindThe solar wind is nothing more than a stream of charged particles flowing outward from the Sun with an average velocity of about 400 km/sec. It is a natural consequence of the Sun being so hot - the corona gas has too much energy to be gravitationally bound to the Sun. Sunspots and Their CycleSunspots are cooler regions on the Sun's photosphere (about 1500 K cooler) and so appear to be darker than the photosphere. A given sunspot can have a lifetime ranging from a few hours to a few months. It consists of two parts - the dark inside region called the umbra and the surrounding less dark region called the penumbra. Their sizes vary over a wide range, with a few having been measured to be 50,000 km in diameter!A German amateur astronomer, Heinrich Schwabe, published a paper in 1851 which stated that the number of sunspots visible on average varied with a period of about 10 years. This conclusion has been substantiated by observations over the 140 years since. The period of repetition on average is 11.1 years, but has been as short as 8 years and as long as 16 years.
Why is our Sun not a ordinary star?
Our Sun is considered an ordinary star because it follows the characteristics of a typical main-sequence star. It is classified as a G-type main-sequence star and is about halfway through its life cycle, converting hydrogen into helium through nuclear fusion in its core. Its uniqueness lies in its proximity to Earth, allowing us to study it in detail and understand the processes happening within a star more effectively.
What is the earth's average distance from the moon?
the average distance is 238,857 miles or 384,403 kilometres
Can a solar blast destroy earth?
While a solar blast could potentially cause damage to Earth's technology and infrastructure, it is highly unlikely to completely destroy the planet. Earth's magnetic field helps to protect it from solar radiation, and the planet has survived many solar events in the past. However, a particularly powerful solar blast could disrupt technology and communication systems.
What happens to dew when the sun rises?
When the sun rises, the warmth and light cause the dew to evaporate. As the temperature rises, the water droplets in the dew transform into water vapor and are released into the air.
What happens if the sun gets red?
As the sun ages, it will expand into a red giant in about 5 billion years. During this phase, it will become much larger and cooler, turning red in color. This expansion will likely cause significant changes to the inner planets of our solar system, including Earth.
Is going to the sun dangerous to humans?
Yes, going to the sun is dangerous for humans due to the extreme heat and radiation levels. Even with advanced technology, humans do not have the capability to withstand the temperatures and conditions encountered near the sun.
What is the intense magnetic fields of sunspots that cause archlike eruptions called?
Those archlike eruptions are called solar flares. They are caused by the intense magnetic fields present in sunspots, which can lead to sudden releases of energy in the form of radiation, particles, and magnetic fields. Solar flares can have significant impacts on space weather and can affect satellite communications, power grids, and navigation systems on Earth.
All sides. The entire thing is a huge ball of flames, burning (Or shining) on all sides.
What is solar angle and Beam spreading?
Solar angle refers to the angle at which the Sun's rays strike a surface. Beam spreading is the process by which a concentrated beam of light or energy spreads out as it moves away from its source, resulting in a wider area being illuminated or affected.
No. g liese 581c is a planet that orbits a star, Gliese 581.
What is the phenomena of solar surface?
The solar surface is known as the photosphere, where the temperature is around 5,500 degrees Celsius. It emits visible light and is the layer from which sunlight is emitted. Sunspots, solar flares, and prominences are all phenomena that occur on the solar surface.
Why does the sun appear to be so large?
The sun appears large in the sky because it is the closest star to Earth, making it look bigger than other stars. Its size in the sky is also influenced by atmospheric conditions and our perception of its brightness.
What are two main gases the sun is made of?
The sun is primarily made up of hydrogen and helium gases. Hydrogen makes up about 74% of its mass, while helium makes up about 24%. Other elements, such as oxygen, carbon, and nitrogen, are present in smaller amounts.
No, the sun does not turn around. It appears to rise and set in the sky due to the rotation of the Earth on its axis. The sun itself remains relatively stationary in the center of our solar system.
What are the worst hours for going out in the sun and why?
The worst hours for going out in the sun are from 10 AMc'vfg to 4 PM. It's best to avoid going out in the sun during this time frame because the sun's ultraviolet (UV) strength is at its peak. If for some reason you have to be out in the sun at these hours use the maximum amount of protection that you can.
What are the three outer planets?
The three outer planets in our solar system are Jupiter, Saturn, and Uranus. These planets are located beyond the asteroid belt and are known for their large size, ring systems, and gaseous compositions.
Does running water come from the sun?
No, running water does not come directly from the sun. Water on Earth comes from a variety of sources such as rainfall, rivers, and groundwater, which are replenished through the water cycle. The sun's energy plays a role in driving the water cycle by causing evaporation and precipitation.
everybody keeps asking me this question and they say do you know who is brothers in our solar system. the brothers in our solar system are JUPITER and SATURN and the way i know that is because look at the rings around SATURN and JUPITER THEY ARE THE SAME AND PLUS I KNOW SCIENCE AND YOU HAVE TO STUDY THE RINGS AND THE WAY THEY LOOK AND I <3 SCIENCE PS IM 10YRS OLD LOLZ
What is charon in the solar system?
Charon is the largest moon of Pluto, a dwarf planet that was once considered a planet. Charon is so massive compared to Pluto that rather than Charon orbiting Pluto, the two objects orbit a common center of mass. This leads some to called Pluto-Charon a binary planetary system.
Can a solar flare harm you physically?
Direct exposure to a solar flare can harm you physically by causing radiation burns and potentially damaging the skin and eyes. However, the Earth's atmosphere and magnetic field provide protection for us against most harmful effects of solar flares. It is advisable to avoid prolonged exposure to solar radiation during periods of high solar activity.
What would you see if you visited the sun?
If you were somehow able to visit the sun, you would be instantly vaporized by the extreme heat and radiation. The sun's surface temperature is about 5,500 degrees Celsius (9,932 degrees Fahrenheit), hot enough to destroy any known material.
What position is the sun at 12 pm?
The sun is directly overhead at noon, which means it is at its highest position in the sky for the day. This position can vary slightly depending on the time of year and your location on Earth, but in general, the sun will be close to its zenith at 12 pm.
