The section of the Hertzsprung-Russell diagram that has the coolest and the brightest stars are the super-giants.
<h3>What is the Hertzsprung-Russell diagram?</h3>
This is a diagram that is used in the field of astronomy to show the absolute brightness of stars against their temperatures.
The super giant stars occur at the upper right of the diagram. In order to find the super giants on this graph, you have to find them at the top right.
Read more on the Hertzsprung-Russell diagram here:
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I believe that would be because it was formed by outsides conquerors who used firearms.
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Answer:
<u>Geocentric Model</u>: - this model is Earth Centered
-Retrograde motion is explained by epicycles
<u>Heliocentric Model</u>: - This model is Sun Centered
-Retrograde motion is explained by the orbital speeds of planets
<u>Both models</u>:- Epicycles and deferents help explain planetary motion
-Planets move in circular orbits and with uniform motion
-The brightness of a planet increases when the planet is closest to Earth
Explanation:
Retrograde motion is an apparent change in the movement of the planet through the sky. Ptolemy's model of the solar systems was geocentric, where the Sun, Moon, planets and start all orbit the Earth in perfectly circular orbits. However this perfectly circular orbits around the Earth did not explain the occasional retrograde motion of the planets. In the Copernicus' heliocentric model, retrograde motion of planets is naturally explained. The explanation for retrograde motion in a heliocentric model is that retrograde occurs roughly when a faster moving planet catches up to and passes a slower moving planet.
Watermelon and rubber bands; shows weakness of how the watermelon has evolved over time?
Answer:
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