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Stars

Stars are balls of luminous plasma, held together by gravity. They can be seen twinkling overhead from our planet each night. They are enjoyable to look at, but also have been used as navigation tools for centuries.

8,859 Questions

Why does the sun go on shinning?

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Asked by Wiki User

The sun shines because of nuclear fusion reactions occurring in its core. These reactions release energy in the form of light and heat, which illuminates our solar system. The sun will continue to shine as long as it has fuel to sustain these fusion reactions.

Why low-mass high-mass stars take different paths at the end of their life?

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Asked by Wiki User

Low-mass stars end their life as white dwarfs due to a lack of sufficient mass to undergo a supernova explosion. High-mass stars, on the other hand, end their life in a supernova explosion followed by either a neutron star or black hole formation due to their intense gravitational collapse. The fate of a star is determined by its mass and how it burns through its nuclear fuel.

When will our sun explode?

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Asked by Cliff31818

The Sun is an averaged size star so it doesn't have enough mass to explode. Instead it reheats and expands into a red giant, so earth will be vaporized within the sun! Oh yeah and don't freak out, it's not going to happen within 5 billion years. Plenty of time to get that degree and a good job, and to raise a family. In four billion years 4,000,000,000 Roughly 4-5 billion years but the Sun will not go dark for roughly 20-30 billion years.

Although the Sun will continue to shine for billions of years Earth will be uninhabitable in roughly 1 billion years this is because as the Sun ages it gets hotter and brighter and in about 1 billion years the temp on Earth will be too hot for liquid water to exist on the surface.

Why the sun turns red when going down?

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Asked by Wiki User

The sun appears red when it is low on the horizon because its light has to pass through more of Earth's atmosphere, which scatters shorter wavelengths (like blue and green) and allows longer wavelengths (like red and orange) to dominate the color spectrum. This scattering effect is more pronounced during sunrise and sunset when the sun's light passes through a thicker layer of the atmosphere.

What helps the Sun keep its shape?

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Asked by Wiki User

The Sun maintains its shape and structure due to a balance of two forces: gravity, which pulls mass inward, and the pressure of nuclear fusion at its core, which pushes outward. These forces work together to keep the Sun stable and prevent it from collapsing under its own gravity.

How do you tell stars apart?

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Asked by Wiki User

Stars can be distinguished based on their color, brightness, and position in the night sky. They are classified using the letters O, B, A, F, G, K, and M to indicate temperature, and Roman numerals to represent their brightness. Additionally, stars have unique spectral signatures that allow astronomers to differentiate them.

Are there more stars or more ants?

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Asked by Wiki User

There are more ants than stars. It is estimated that there are about 10 million trillion ants on Earth, while there are roughly 100 to 400 billion stars in our galaxy alone.

What is a binary star system?

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Asked by Wiki User

A binary star system is a system in which two stars are orbiting around a common center of mass. These stars are bound together by gravity and can orbit each other in various configurations, such as close binaries where the stars are very close together, or wide binaries where they are farther apart. Binary star systems are common in the universe.

How do sunspots change over time?

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Asked by Wiki User

Sunspots change over time in an approximately 11-year cycle called the solar cycle. They start as small, dark spots on the sun's surface that grow in number and size, reaching a maximum level during the cycle's peak. As the cycle progresses, sunspots decrease in number until the cycle starts anew.

What characteristic of a star is determined by its distance from the observer?

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Asked by Wiki User

The apparent brightness of a star is determined by its distance from the observer. Stars that are closer appear brighter in the sky, while those that are farther away appear dimmer. This relationship follows the inverse square law, meaning that a star's brightness decreases with distance squared.

Is Betelgeuse or Rigel the oldest and which is predicted to die out first?

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Asked by Wiki User

Betelgeuse is the older star of the two, estimated to be around 8-8.5 million years old compared to Rigel which is approximately 7-9 million years old. Betelgeuse is also predicted to die out first as it is a red supergiant in the late stages of its life, while Rigel is a younger, brighter blue supergiant.

Why are earth-based parallax measurements limited to only the nearest stars?

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Asked by Wiki User

Earth-based parallax measurements are limited to the nearest stars because the angles involved are very small, making it challenging to detect for distant objects. The parallax angle decreases as the distance to the object increases, making it increasingly challenging to measure accurately beyond a certain range. This limits the applicability of this method to only the closest stars within a few hundred light-years of Earth.

How big is the moon compared to the sun?

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Asked by Wiki User

The moon is much smaller than the sun. The sun is about 400 times larger in diameter than the moon. This size difference is why the sun appears much bigger and brighter in the sky compared to the moon.

What is the Northern Star?

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Asked by Wiki User

The North Star (Polaris) is the brightest star in the constellation Ursa Minor and is located very close to the celestial North Pole. It has been used for navigation throughout history because it remains fixed while the other stars appear to move in the night sky.

Does the sun give us light?

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Asked by Wiki User

Yes, the sun emits light across a wide spectrum of wavelengths, including visible light, which is what we perceive with our eyes. This visible light is essential for providing illumination on Earth and supporting various biological processes through photosynthesis.

Can there be energy without the sun?

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Asked by Wiki User

Yes, there can be energy without the sun. Energy can be generated through various processes such as chemical reactions, geothermal heat, and nuclear reactions. While the sun is a major source of energy for life on Earth, there are other sources of energy available.

Why is the sun white?

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Asked by Wiki User

The sun appears white when viewed from space because it emits all colors of light, which combine to create white light. However, when the sun's light passes through the Earth's atmosphere, it can appear yellow, orange, or red due to scattering of shorter wavelengths of light by particles in the atmosphere.

Why does the sun look smaller in the sky?

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Asked by Wiki User

The sun appears smaller in the sky due to the Earth's atmosphere scattering sunlight. This scattering causes the sun's rays to spread out, making the sun's size seem smaller than it actually is. Additionally, when the sun is higher in the sky, it appears smaller compared to when it is near the horizon due to an optical illusion.

Explain why the sun will increase in size as it begins to burn off its fuel?

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Asked by Wiki User

As the sun burns through its hydrogen fuel, it undergoes nuclear fusion in its core, converting hydrogen into helium. This process generates energy, causing the sun's core to heat up and its outer layers to expand. This expansion causes the sun to increase in size, becoming a red giant as it nears the end of its life cycle.

What spectral class of stars are less common?

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Asked by Wiki User

O, B, and A spectral class stars are less common than G, K, and M spectral class stars. These earlier spectral class stars are larger, hotter, and more massive, leading them to have shorter lifespans and therefore be less abundant in the galaxy.

What is the color of the sun?

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Asked by Wiki User

The Sun has a spectral type of G2V. It's colour is yellow.

But although the Sun gives off most of its energy in the yellow-green frequencies, the light emitted is effectively white.

The yellow color and apparent texture come from the scattering of its light by Earth's atmosphere. This is evident in photographs from space. The actual granulation is invisible except under magnification, and sunspots are not discernible as 'darker' by the human eye (this requires heavy filtering).

Green Sun? The surface temperature of the Sun is about 5,778 Kelvin (although it's spectrum is not a perfect black body) you can see from graph [See related link - Star spectrum) that our Sun at that temperature is actually a pinkish peach!

The only known green star is Beta Librae [See related question] but it's not actually green as the answer will show - and also the graph.

Do guinea pigs like the dark?

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Asked by Wiki User

Guinea pigs prefer a consistent light/dark cycle, so they do not particularly like being in complete darkness all the time. They need some natural light to maintain their internal clock and stay healthy. However, they do need a dark, quiet environment for sleeping.

Why do all the planets go around the sun in the same direction and why do they lie on a relativrly flat plane?

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Asked by Wiki User

The planets orbit the sun in the same direction due to the conservation of angular momentum from the rotating gas and dust cloud that formed the solar system. The relatively flat plane of their orbits, known as the ecliptic plane, is a result of the solar system forming from a spinning disk of gas and dust, with gravity pulling materials towards the center in the same direction.

How many more years can the sun last?

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Asked by Wiki User

there is no definet answer but it will run out when it is time we should have sunlight many more years to come?

ANSWER:Scientists have estimated that the sun is going to last for another 5 billion years before it becomes a red giant and its corona will reach the Earth. So get those insurance policys updated.

My friend's dad is a Scietist,and he said the sun will last for 5 billion more years.