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:
In essence, the nebular theory holds that __________.
our solar system formed from the collapse of an interstellar cloud of gas and dust
Explanation:
hope it helps
Sediments are defined as solid fragments of inorganic or organic material. The bulk of sediment is formed from the weathering of rock, wherein the rock is broken into smaller and smaller pieces by a variety of chemical and mechanical processes, including acidic rainfall, freeze/thaw cycles, and the actions of organisms.
So I believe the answer is right let me know
Answer:
Below
Explanation:
An understanding of the structure of the Earth is important for many reasons
1. It can help us understand things that happen on the surface, like the magnetic field. The structure of the Earth explains that.
2. Things like tectonic plates severely affect the planet, such as the creation of many natural disasters. Understanding them helps us better prepare and anticipate them.
3. Understanding the structure of the Earth can help us identify the location of important natural resources (like different metals)
4. In the production of things like geothermal energy we need to understand the Earth's structure to know where we will get the most heat
