 From Earth @-@ based radar and spacecraft images of the crater edge , Shackleton appears to be relatively intact ; much like a young crater that has not been significantly eroded from subsequent impacts . This may mean that the inner sides are relatively steep , which may make traversing the sides relatively difficult for a robotic vehicle . In addition , it is possible that the interior floor might not have collected a significant quantity of volatiles since its formation . However other craters in the vicinity are considerably older , and may contain significant deposits of hydrogen , possibly in the form of water ice . ( See Shoemaker ( lunar crater ) , for example . ) 
 From Earth @-@ based radar and spacecraft images of the crater edge , Shackleton <a href='uninflect' title='1'><mark>appears</mark></a> to be relatively intact ; much like a young crater <a href='null_relcl' title='2'><mark>that</mark></a><a href='been_done' title='3'><mark>has</mark></a> not been significantly eroded from subsequent impacts . This may mean that the inner sides are relatively steep , which may make traversing the sides relatively difficult for a robotic vehicle . In addition , it is possible that the interior floor might not <a href='been_done' title='4'><mark>have</mark></a> collected a significant quantity of volatiles since its formation . However other craters in the vicinity <a href='drop_aux' title='5'><mark>are</mark></a>considerably older , and may contain significant deposits of hydrogen , possibly in the form of water ice . ( See Shoemaker ( lunar crater ) , for example . ) 
From Earth @-@ based radar and spacecraft images of the crater edge , Shackleton appear to be relatively intact ; much like a young crater done not been significantly eroded from subsequent impacts . This may mean that the inner sides are relatively steep , which may make traversing the sides relatively difficult fir a robotic vehicle . In addition , it is possible that da interior floor might not done collected a significant quantity of volatiles since its formation . However other craters in the vicinity considerably older , and may contain significant deposits of hydrogen , possibly in the form of water ice . ( See Shoemaker ( lunar crater ) , fa example . )