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What would happen if the sun was half its size? What would happen if it was double its size?
Our sun will double in size in another 3 - 4 billion years before it shrinks down to less than half the size it is now. In each case life...
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A person on the earth is looking up at the sun, which is 92,900,000 miles away. The angle spanned by the sun at the person's eye is approximately 0.5 degrees. What is an estimate for the diameter of the sun?
As 0.5 degrees is quite a small angle the diameter of can be calculated as $rθ$, where r is the distance to the Sun and θ is the angle in...
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Do planets actually revolve around the sun? Maybe they follow the sun around a more central Star in middle of Galaxy? Based on the heliocentric model of orbiting, how could the planets revolve around the sun this way, if this it were true?
No scientist seriously doubts the heliocentric theory, indeed evidence of it is available to anyone with a decent phone or very modest telescope and a few clear nights to observe...
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What is keeping the Earth's degree of tilt in its orbit around the Sun and why doesn't the Earth wobble? When was the last time the Earth's degree of tilt changed?
The Earth's tilt axis , or obliquity, is changing continuously over a 41,000 year cycle. The angle of tilt varies between 22.1 and 24.5 degrees. It is currently at 23.44...
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Does the Moon revolve around the Earth, or do they spin around each other as they revolve around the sun?
The center of mass of the Earth and Moon is called the Earth-Moon Barycenter or EMB. It is about 1,700km beneath the Earth's surface. Both the Earth and the Moon...
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Light from the sun reaches Earth in 8.3 min. The velocity of light is 3.00 108 m/s. Given this info, how would you determine how far the Earth is from the sun?
Velocity is defined as the rate of travel, and can be found using the distance formula. $"velocity" = "distance"/"time"$ Rearranging this formula we can solve for distance given velocity and...
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If light takes 8 minutes to travel from the sun to Earth and 5 hours to travel from the sun to Pluto, what is the distance from the sun to Pluto?
Light takes about 5.5 hours to reach Pluto from . If you know the time that light takes to reach certain object, you can deduce the distance to that object...
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If you take millions of tons of metal off the earth in the form of satellites therefore reducing earth's specific mass, would this in turn affect the earth's orbit around the sun?
Our estimates are from scientific computation. The precision (the number of correct significant digits (sd), in scientific notation) cannot be more than the smallest among the sd in the...
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Who is famous for stating that the Earth revolves around the sun, and not the other way around?
It was Polish astronomer, Nicholas Copernicus who stated that Earth revolves around (and not the other way round as stated by Ptolemy). He, however, assumed Sun to be at the...
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Do all living things have to have all of the characteristics of life? Can something be considered living if they have a only a few characteristics? Why?
Each feature helps the organism to survive and if one is missing it means this organism is threatened. for example organisms cannot stay with out getting nutrients as they will...
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