| 11. | The motion of any mass is affected by the gravitational field.
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| 12. | The gravitational field of the Moon was mapped in unprecedented detail.
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| 13. | In classical mechanics as in physics, a gravitational field is a physical quantity.
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| 14. | They are equal if and only if the external gravitational field is uniform.
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| 15. | The recipe allows matter to feel both gravitational fields at once.
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| 16. | Gas is heated by the fall into the strong gravitational field.
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| 17. | General relativity reduces to Newtonian gravity in the limit of weak gravitational fields.
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| 18. | However we have not yet considered the gravitational field of the quasar itself.
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| 19. | Would the heated object have a stronger gravitational field than the unheated object?
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| 20. | Other devices can detect variations in the earth's gravitational field, revealing underground voids.
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