Our Sun


What gases make up the sun September 3

Scientists study the components of the sun by analyzing the spectrum of light it gives off. The same technique works for stars, but because the sun is so much closer, scientists can collect better data. While this technique gives scientists excellent

How many lumens does the sun give off September 3

A lumen is the measurement of light available at a given distance, and illuminance is the measure of the intensity by which something is illuminated by a light source. When these measurements are taken according to the metric system, it is referred t

How many satellites does the sun have September 3

A satellite is defined as any object in orbit around another object. An object orbiting the sun is said to be in "heliocentric" orbit. The natural objects orbiting the sun include the eight planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn,

What is the temperature of the sun September 3

What is the temperature of the sun
The extremely high temperature of the core is what makes it possible for the nuclei of atoms to collide and produce nuclear fusion reactions. These reactions generate the sun's energy which ...

How does the sun produce energy September 3

How does the sun produce energy
The enormous pressure in the sun keeps the fusion running for huge amounts of time. Because the sun is dense and massive, it produces huge gravitational pull. These gravitational forces that ...

Why is totality during a solar eclipse not accomplished September 3

Why is totality during a solar eclipse not accomplished
When the moon passes between the sun and the Earth, it creates an area of deep shadow where the sun's light is completely obscured. This is the umbra, the area where the eclipse reaches tota ...

Why does the sun appear to move across the sky September 3

Why does the sun appear to move across the sky
At some level, everything in the universe is orbiting something else, often something many times larger. This is a function of gravity, as larger objects act against smaller objects, eventua ...

What is the difference between direct and indirect sunlight September 3

What is the difference between direct and indirect sunlight
Indirect sunlight also is called diffuse sky radiation, because it is sunlight that reaches the Earth's surface after being dispersed in the atmosphere over haze, dust and clouds. As roughly ...

What are the three layers of the sun's atmosphere September 3

What are the three layers of the sun's atmosphere
The atmosphere of the sun surrounds its surface, which is separated from the core by radiative and convective layers. The core is the hottest part of the sun, as it reaches about 27 million ...

What does the sun do September 3

What does the sun do
The sun is a remarkably large object, and it is more than 1 million times more massive than the Earth. This incredible mass causes the sun to have a very strong gravitational pull. This grav ...

How much bigger is the Sun than the Earth September 3

How much bigger is the Sun than the Earth
Speaking in terms of volume, 1,300,000 Earths fit inside the Sun. In relative terms, think of Earth as being the size of the head of a pin and the Sun as being the size of a basketball. In t ...

What is the source of the sun's energy September 3

What is the source of the sun's energy
More than 90 percent of the matter in the universe is hydrogen, and the sun, like all stars, is primarily composed of hydrogen. Due to its high gravity, the forces in the center of the sun a ...

What is the chemical make-up of the sun September 3

The amount of hydrogen and helium in the sun makes sense, as the primary energy source of the sun is a thermonuclear reaction, in which hydrogen atoms are fused together to form helium atoms. By studying the ratio of hydrogen present in the sun to th

What is the diameter of the Sun July 29

The sun's star classification sets its as a G-type main-sequence star. This technically makes it a G dwarf or yellow dwarf star. There are other stars in the galaxy that are much larger than the sun. Betelgeuse, for example, is a red giant star that

What is sunlight made of July 29

UV light from the Sun is extremely harmful, but it is absorbed by the layer of ozone gas surrounding the Earth's upper atmosphere. Compared to the wavelength of visible light, infrared light has a longer wavelength and UV light has a shorter waveleng

How does the sun produce heat July 29

The sun produces a massive amount of energy due to the nuclear fusion reaction in its core, in which the element hydrogen is converted into helium. The temperature in the core is about 13,600,000 degrees Kelvin, and this heat is transferred into the

What kind of energy is sunlight July 29

What kind of energy is sunlight
Credit:Takashi HososhimaCC-BY-2.0Electromagnetic energy from the sun contains visible light, infrared light and ultraviolet light. Infrared and ultraviolet radiations do not fall in the visi ...

What is a total lunar eclipse July 28

"Syzygy" comes from the Greek word for "being paired together." When the sun, Earth and moon are not perfectly aligned, only the outer part of the Earth's shadow covers the moon. This type of eclipse is called a penumbral eclipse. In a
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