The massive mountain has strongly interacted with the wind, leaving a wide dust-free zone on its leeward side.
And the nuclear-winter hypothesis (that the smoke from fires caused by a global nuclear war would blot out the sun's rays and thus cool the earth catastrophically) owes its origin, at least in part, to observations of a planet-wide dust storm on Mars.
Planetary atmospheres are affected by the varying insolation or internal energy, leading to the formation of dynamic weather systems such as hurricanes, (on Earth), planet-wide dust storms (on Mars), an Earth-sized anticyclone on Jupiter (called the Great Red Spot), and holes in the atmosphere (on Neptune).
It constitutes a frontal storm up to 60 miles (100 km) wide carrying sand, dust, and debris high into the air and is followed by a sharp drop in temperature and often by rain.
Although spreading disks of dusty material and even planets have been detected around many other stars, astronomers said the new observations bore the strongest resemblance yet to the solar system's asteroid belt, a wide region of dust and rocky debris between Mars and Jupiter.
A solar satellite took detailed images as the visitor, called Comet NEAT, swept past and spewed wide trails of dust and gas.
End-member mixing calculations based on εNd reveal a wide range in dust influence on surface soils, with between 0% and 92% of the top 20 cm of ridgetop soil Nd derived from African dust.
It's hard-drive shaped, for better or for worse, and while it's solidly constructed, its ports are also wide open for dust or coffee to get in, so keep it safe until it's needed.
The living room upholstery had the widest range of dust weight (0 12215.2 mg), although the distributions for all sites were generally similar.
"Why, why did they take him?" sobbed Qasim Salman, wiping wide circles in the dust with his palms.
Soil-sample analyses conducted by the landers show that the soils at the two sites are nearly identical in composition, which is probably the result of a mixing of windblown dust from wide regions of the planet.
