What does it mean for a Kuiper Belt Object to be considered a plutino?
What will be an ideal response?
They are objects caught in a 3:2 resonance with Neptune.
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What does the Milky Way look like on the night sky?
A. a spiral-shaped region of nebulosity B. a uniform scattering of stars throughout the sky C. a pale band of light scattered with stars that stretches across the sky D. The Milky Way is not visible from Earth without a telescope.
The wavelength of the red-pink line emitted by a laboratory sample of excited hydrogen is 656 nm. Taking a spectrum of a glowing nebula, you find that the same red-pink line of hydrogen appears at 662 nm. You conclude that the nebula
A. is moving away from us at about 1% the speed of light. B. is 1% hotter than hydrogen in the laboratory sample. C. is moving toward us at about 1% the speed of light. D. is 1% cooler than hydrogen in the laboratory sample.
Star A has a temperature 1/2 that of star B, but star A is 3 times bigger than star B. Which statement below is correct?
A) Star A is redder and dimmer than star B. B) Star A is bluer and dimmer than star B. C) Star A is redder and brighter than star B. D) Star A is bluer and brighter than star B. E) Star A and star B have the same color, but star A is brighter.
The source of all magnetism is
A) tiny pieces of iron. B) tiny domains of aligned atoms. C) ferromagnetic materials. D) moving electric charge. E) none of the above