| 1. | On April 15, 2015, Pluto was imaged showing a possible polar cap.
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| 2. | On 15 April 2015, Pluto was imaged showing a possible polar cap.
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| 3. | Earth's polar caps have changed dramatically over the last 12, 000 years.
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| 4. | When the tilt or obliquity changes the size of the polar caps change.
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| 5. | The Polar Lander is scheduled to land near an ice-sheathed Martian polar cap.
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| 6. | It also has a dark equatorial belt along with its bright polar caps.
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| 7. | "And being close to the polar cap, perhaps you're close to water ."
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| 8. | Both factors could alter the amount of sunlight and heat reaching the polar caps.
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| 9. | The two represent the polar caps of the sports world.
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| 10. | These polar layered deposits lie under the permanent polar caps.
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