 Shackleton is an impact crater that lies at the south pole of the Moon . The peaks along the crater 's rim are exposed to almost continual sunlight , while the interior is perpetually in shadow ( a Crater of eternal darkness ) . The low @-@ temperature interior of this crater functions as a cold trap that may capture and freeze volatiles shed during comet impacts on the Moon . Measurements by the Lunar Prospector spacecraft showed higher than normal amounts of hydrogen within the crater , which may indicate the presence of water ice . The crater is named after Antarctic explorer Ernest Shackleton . 
 Shackleton <a href='drop_aux' title='1'><mark>is</mark></a>an impact crater <a href='null_relcl' title='2'><mark>that</mark></a><a href='uninflect' title='3'><mark>lies</mark></a> at the south pole of the Moon . The peaks along the crater <a href='null_genetive' title='4'><mark>'s</mark></a>rim are exposed to almost continual sunlight , while the interior <a href='drop_aux' title='5'><mark>is</mark></a>perpetually in shadow ( a Crater of eternal darkness ) . The low @-@ temperature interior of this crater functions as a cold trap <a href='null_relcl' title='6'><mark>that</mark></a>may capture and freeze volatiles shed during comet impacts on the Moon . Measurements by the Lunar Prospector spacecraft showed higher than normal amounts of hydrogen within the crater , which may indicate the presence of water ice . The crater is named after Antarctic explorer Ernest Shackleton . 
Shackleton an impact crater lie at the south pole of da Moon . The peaks along the crater  rim r exposed to almost continual sunlight , while tdainterior perpetually in shadow ( a Crater of eternal darkness ) . Thdaow @-@ temperature interior of dis crater functions as a cold trap may capture and freeze volatiles shed during comet impacts on the Moon . Measurements by thedanar Prospector spacecraft showed higher den normal amounts of hydrogen within the dater , which may indicate the pdaence of water ice . The crater is named after Antarctic explorer Ernest Shackleton .