The element you need is in the planet's core. Your instruments detect large quantities of nitrogen in the soil. Which shape is the largest opening for you to fly into?
Because there is no atmosphere in space, there is no medium through which sound can travel, meaning that space is completely and utterly silent. Not even the statement, ‘It’s so silent you can hear a pin drop’ would hold true in the great starry expanse. Astronauts communicate using radios, since radio waves can still be sent and received. Do you copy? Over and out.