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:
Between Manufacturing and Services.
Explanation: Manufacturing is one of Australias biggest strengths. Better than NZ better than Japan almost as good as the USA, Services go for Civil services in my opinion.
The earth tilts for different times of the year. During the summer Alaska is a lot closer to the sun than florida.
Answer: They are describing what kinds of cultures are in each place.
Explanation:
When geographers refer to describing places spatially, they describe what kids of culture are in each place.
