... Upon close inspection, many surface cracks stop abruptly only to continue on somewhere else -- indicating surface plates that might be sliding . ...
... The sunspots are regions of strong surface magnetic fields which are dark in this ... But also visible in this photograph from November 15, is planet Mercury. ... At just over 1/3 Earth's size, Mercury is passing in front of the Sun, its ...
... Callisto is only slightly smaller than Mercury but only a third of its mass. ... Callisto's surface is covered entirely with craters. ... The surface is very old , like the highlands of the Moon and Mars . ...
... fly just 524 miles above Ganymede's surface to provide the most detailed images and ... moon in the Solar System -- bigger than Mercury and about three-quarters the size of ...
... Explanation: Today, the space capsule Liberty Bell 7 rests about 3 miles below the surface of the Atlantic Ocean. ... Grissom's flight was suborbital - like fellow Mercury astronaut Alan Shepard's first flight - however his capsule was different ...
... It is larger in diameter than Mercury but only about half its mass. ... of water or water ice with an ice surface (and that Titan and Triton were similar ... Ganymede's surface is a roughly equal mix of two types of terrain: very old , highly ...
... Therefore, like our Moon's maria , these craters on Mercury are thought to have been flooded by lava floes that are old but not as old as the surrounding more highly cratered surface. ...
... Like Mercury and the Moon, Mars appears to lack active plate tectonics at present; there is no evidence of recent horizontal motion of the surface such as the folded mountains so common on Earth . ...
... Mercury has an extra large core (relative to its diameter); the mantles of Mars and ... Earth's surface and thereby eliminate almost all traces of earlier geologic surface ...