The planet Uranus is:
A) easily visible with the naked eye.
B) barely visible with the naked eye.
C) only visible with a small telescope or binoculars.
D) only visible with a large, high quality telescope.
E) only visible with a space-based telescope.
B
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What makes a star stop contracting?
A. The dust in it gets packed so tightly that it cannot continue to contract. B. Its gravity gets too strong for it to continue contracting. C. It gets hot enough that its pressure builds up, pushing back against the force of gravity. D. Its magnetic field pushes back against the force of gravity. E. It gets cool enough that it freezes, and the resulting ice is hard enough to push back against gravity.
The stability of a neutron star is expected only if a neutron star is a ____________
a. solid b. fluid c. gas d. All of the other choices are correct.
Briefly describe how a star forms.
What will be an ideal response?
The escape speed for a black hole's event horizon is the speed of light
Indicate whether the statement is true or false