liquid core
41Nuclear fuel — Process …
42Ganymede (moon) — Ganymede Image of Ganymede s anti Jovian hemisphere taken by the Galileo probe. Lighter surfaces, such as in recent impacts, grooved terrain and the whitish north polar cap at upper right, are enriched in water ice. Discovery …
43Titan III — infobox rocket imsize = 175 caption = MOL mockup launch by a Titan IIIC on Nov. 3, 1966 from LC41 Cape Canaveral, FL. (USAF) name = Titan IIIC function = Medium/Heavy launch vehicle manufacturer = Martin country origin = United States height = 42 …
44Mercury's magnetic field — Magnetosphere of Mercury Graph showing relative strength of Mercury s magnetic field. Discovery[1] …
45Life on Mars — For other uses, see Life on Mars (disambiguation). An artist s impression of what Mars surface and atmosphere may look like if Mars were terraformed. Scientists have long speculated about the possibility of life on Mars owing to the planet s… …
46Mercury (planet) — Mercury  ☿ …
47Titan IV — infobox rocket caption = Launch of a Titan IVB launch vehicle. (USAF)name = Titan IV function = Heavy expendable launch system manufacturer = Lockheed Martin country origin = United Statescpl = $432 million (USD) cpl year = 1999height = 44m alt… …
48Plate tectonics — The tectonic plates of the world were mapped in the second half of the 20th century …
49Seismology — (from Greek gr. σεισμός, seismos , earthquake ; and gr. λογία, logia ) is the scientific study of earthquakes and the propagation of elastic waves through the Earth. The field also includes studies of earthquake effects, such as tsunamis as well… …
50Beast Machines — infobox Television show name = Beast Machines caption = The Beast Machines TV Series Logo format = Animated television series runtime = 30 minutes voices = See Cast country = CANUSA network = Fox Kids YTV first aired = September 18, 1999 last… …
