How is the distance between the earth and the sun optimum?
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Elliptical orbit. The AU is the averagedistance from the Earth to the sun. ...Earth's closest approach to the sun, called perihelion, comes in early January and is about 91 million miles(146 million km), just shy of 1 AU. The farthest from the sun Earth gets is called aphelion.
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Hey There!!!
Our Sun, the star of our Solar System, is the primary source of Heat and Light.
The Sun fuses Hydrogen into Helium, and this nuclear reaction releases a lot of heat energy.
The amount of heat energy received by some place depends directly on the distance from the Sun.
That is, a place near to the Sun will receive more Heat. A place farther from the Sun will receive lesser heat.
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Why Does The Distance Matter?
If a planet is too near to a star, like Mercury and Venus, the heat energy from the Sun is so high that all water will be evaporated. Water cannot stay in liquid form in these conditions.
Also, Temperatures would be too high to sustain any life.
If a planet is too far from the star, then temperatures would be so low that all water would be frozen. Water would not be able to stay in liquid phase now. This is what is the case with the far planets like Neptune, Uranus.
This tells us that there is a middle range, where temperature and heat energy received are just right for water to stay in liquid state, and life can be possible.
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The Average Distance of the Earth from the Sun is known as 1 Astronomical Unit (AU).
1 AU = 149,597,870,700 metres , which is approximately 150 million kilometers.
Earth is about the right distance from the Sun, so that temperatures are not too high, and not too low. Water can stay in liquid phase.
It is only due to this that Life is Possible.
The Distance of a planet from a star, at which optimum conditions are present, is commonly known as the Goldilocks Zone. In technical terms, we call it the Circumstellar Habitable Zone (CHZ)
Every star has a such a zone, where distance is just right to sustain life.
Earth lies in the CHZ of Sun.
If not, we wouldn't be alive today to ask this question :))
____________________________________
Hope it helps
Purva
Brainly Community
Our Sun, the star of our Solar System, is the primary source of Heat and Light.
The Sun fuses Hydrogen into Helium, and this nuclear reaction releases a lot of heat energy.
The amount of heat energy received by some place depends directly on the distance from the Sun.
That is, a place near to the Sun will receive more Heat. A place farther from the Sun will receive lesser heat.
____________________________________
Why Does The Distance Matter?
If a planet is too near to a star, like Mercury and Venus, the heat energy from the Sun is so high that all water will be evaporated. Water cannot stay in liquid form in these conditions.
Also, Temperatures would be too high to sustain any life.
If a planet is too far from the star, then temperatures would be so low that all water would be frozen. Water would not be able to stay in liquid phase now. This is what is the case with the far planets like Neptune, Uranus.
This tells us that there is a middle range, where temperature and heat energy received are just right for water to stay in liquid state, and life can be possible.
____________________________________
The Average Distance of the Earth from the Sun is known as 1 Astronomical Unit (AU).
1 AU = 149,597,870,700 metres , which is approximately 150 million kilometers.
Earth is about the right distance from the Sun, so that temperatures are not too high, and not too low. Water can stay in liquid phase.
It is only due to this that Life is Possible.
The Distance of a planet from a star, at which optimum conditions are present, is commonly known as the Goldilocks Zone. In technical terms, we call it the Circumstellar Habitable Zone (CHZ)
Every star has a such a zone, where distance is just right to sustain life.
Earth lies in the CHZ of Sun.
If not, we wouldn't be alive today to ask this question :))
____________________________________
Hope it helps
Purva
Brainly Community
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