What is the motion of the stars in the disc of a galaxy with a ‘flat-rotation-cu

Question

What is the motion of the stars in the disc of a galaxy with a ‘flat-rotation-curve’?

Stars in the plane are flatter than stars in the halo

The orbital speeds of the stars are approximately the same at all radii from the center of the galaxy

The stars orbit at increasing speeds the farther they are from the center of the galaxy

The disc has flattened into a plane while the halo is more spherical

Stars orbit in flattened curves about the galaxy’s center

Stars in the plane are flatter than stars in the halo

The orbital speeds of the stars are approximately the same at all radii from the center of the galaxy

The stars orbit at increasing speeds the farther they are from the center of the galaxy

The disc has flattened into a plane while the halo is more spherical

Stars orbit in flattened curves about the galaxy’s center

Explanation / Answer

The stars orbit at increasing speeds the farther they are from the center of the galaxy because, Stars revolve around their galaxy's centre at equal or increasing speed over a large range of distances.

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