Spherical Geometry: Great Circle or Geodesic vs. Small Circle

Great Circle / Geodesic:

Any circle that passes through the center of a sphere is called a Great Circle or Geodesic.

Small Circle:

Any plane intersecting the sphere but not passing through the sphere is called Small Circle.

What is Equator?

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The equator is an imaginary line drawn around the middle of the Earth, halfway between the North and South Poles. It is the reference line from which the Earth’s latitude and longitude are measured and divides the planet into two hemispheres. Facts about the Equator: The equator is an arbitrary line that divides the earth … What is Equator? Read…

What Are Latitude & Longitude of Earth?

Leave a Comment / The Celestial Sphere

Latitude: Latitude is the horizontal lines through the earth. We get the equator with the concept of Latitude. Longitude: Longitude is the verticle lines through the earth. For more explanation: Imagine our world as a three-dimensional ball. Latitudes are imaginary lines that run from west to east, parallel to the equator. The equator is … What Are Latitude &…

What is the difference between deferent and epicycle?

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Deferent vs. Epicycle Deferent: A deferent is a large circle that was used by ancient astronomers to explain the motion of planets across the sky. It assumed that all celestial bodies moved around Earth in perfectly circular orbits and so had to account for any irregularities observed from this model. Epicycle: An epicycle is a … What is the difference…

What are celestial objects?

Leave a Comment / Astrophysics, The Celestial Sphere

Explore the vast array of celestial objects and phenomena that populate the universe with our engaging explanation of celestial objects in astrophysics. From planets and stars to galaxies and black holes, celestial objects are a central focus of astrophysics and hold the keys to many of the mysteries of the cosmos.

The Geocentric Universe

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Plato was a Greek philosopher who lived in the 4th century BCE. He is known for his contributions to the fields of philosophy, mathematics, and politics. One of his ideas was the concept of a geocentric universe, which held that the Earth was at the center of the universe and that the sun, moon, and … The Geocentric Universe Read…

What is Renaissance?

Leave a Comment / Astrophysics, The Celestial Sphere

The Renaissance was a period of great cultural, artistic, and intellectual activity that took place in Europe from the 14th to the 17th centuries. It is often referred to as the “rebirth” of classical learning, as it was marked by a renewed interest in the ideas and achievements of the ancient Greek and Roman civilizations. … What is Renaissance? Read…

Great Circle / Geodesic:

Small Circle:

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