Answer: is constant
Explanation:
In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.
Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.
Answer:
. Galileo Galilei was the first astronomer to use a telescope to study the heavens. Galileo made a number of observations that finally helped convince people that the Sun-centered solar system model (the heliocentric model), as proposed by Copernicus, was correct.
Explanation:
The sun rises due east and sets due west.
Answer:
Indian Ocean
Explanation:
Arctic Ocean= Area: 5.427 million mi²
Red Sea= Area: 169,113 mi²
Indian Ocean= Area: 27.24 million mi²
Baltic Sea= Area: 145,561 mi²
Answer:
The region consists of three sections: the Northern part of the coast is called the Konkan (Mumbai to Goa), the central stretch is called the Kanara or the "Karavali", while the southern stretch is referred to as the Malabar Coast.
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