11.   Five minutes before the lander enters the Martian atmosphere, the two probes will break away and drop like bombs.

12.   Half an hour was then left before the craft plunged into the fringes of the thin Martian atmosphere, which is mostly carbon dioxide.

13.   He dreams of technical advances that would permit humans to direct cometlike ice-teroids from the distant Kuiper Belt and Oort Cloud into the Martian atmosphere.

14.   He said the forces on the panel coincided with an unexpected doubling in the density of the Martian atmosphere, as recorded by instruments on board.

15.   Investigators believe it dove into the Martian atmosphere because of errors in navigation.

16.   It is an infrared radiometer for examining the temperatures and water content of the Martian atmosphere.

17.   NASA scientists have recently found out that solar wind blasted away the Martian atmosphere, following the demise of its magnetic field four billion years ago.

18.   Officials described the maneuvers as a success, giving them confidence that the unlatched solar panel would be able to withstand the pressures of dipping into the Martian atmosphere.

19.   Once there, astronauts would use gasses in the Martian atmosphere to power a rover vehicle, which they would use to explore the planet, Zubrin said.

20.   One find had pockets filled with gas that matched Martian atmosphere samples taken during the Viking mission.