Wiktionary
n. (context planetology English) A high-latitude region of a celestial body that is covered by ice.
Usage examples of "polar cap".
He noticed that the huge orbiter photo of the polar cap had a tiny blue enameled pin stuck outside the white spiral, marked SOUTH POLAR RESEARCH STATION.
On one wall, over a tiny couch, she had a giant orbital photo of the southern polar cap in summer-it was like an abstraction, white spiral on ocher rust.
It's an impact basin, one of the biggest on Mars, almost as big as Argyre, but it hit down here near the South Pole, so about half of its rim has since been buried under the polar cap and the layered terrain.
It had been suggested that the huts were no longer there: that the radar's eye was unable to distinguish between an ice-sheathed hut and the thousands of ice hummocks that dot the polar cap in winter: and that they had been searching in the wrong area in the first place.
Around the south polar cap, snowfall would remain frozen, but most of the meteorologists predicted that when things stabilized there wouldn't be much snowfall on the pole, that it would become a cold desert like Antarctica.
As for the other physical operations, the black snow algae is on the northern polar cap, and can't be removed.
Around the south polar cap, snowfall would remain frozen, but most of the meteorologists predicted that when things stabilized there wouldn’.
But as the ice swelled once more, he realized that tidal waves must be surging beneath the polar cap, no doubt spawned by a seabed quake.
It was the tip of a glacier, perhaps a tongue of the polar cap itself.
The icemobile suddenly stopped fitnctioning when the men were near the edge of the main polar cap, no more than a kilometer from where they had parked the rover.