sábado, 30 de noviembre de 2013

viernes, 29 de noviembre de 2013

miércoles, 27 de noviembre de 2013

domingo, 24 de noviembre de 2013

sábado, 23 de noviembre de 2013

viernes, 22 de noviembre de 2013

jueves, 21 de noviembre de 2013

miércoles, 20 de noviembre de 2013

martes, 19 de noviembre de 2013

700 Hot Air Balloons

Last month in Albuquerque, over 700 hot air balloons lifted off as part of the 42nd annual International Balloon Fiesta.

lunes, 18 de noviembre de 2013

domingo, 17 de noviembre de 2013

Hurricane? Cyclone? Typhoon? Here's the difference

HURRICANE? CYCLONE? TYPHOON? They’re all the same, officially tropical cyclones. But they just use distinctive terms for a storm in different parts of the world. Hurricane is used in the Atlantic, Caribbean Sea, central and northeast Pacific. They are typhoons in the northwest Pacific. In the Bay of Bengal and the Arabia Sea, they are called cyclones. Tropical cyclone is used in the southwest India Ocean; in the southwestern Pacific and southeastern India Ocean they are severe tropical cyclones.

STRENGTH: A storm gets a name and is considered a tropical storm at 39 mph (63 kph). It becomes a hurricane, typhoon, tropical cyclone, or cyclone at 74 mph (119 kph). There are five strength categories, depending on wind speed. The highest category is 5 and that’s above 155 mph (249 kph). Australia has a different system for categorizing storm strength.

ROTATION: If they are north of the equator they rotate counterclockwise. If they are south, they rotate clockwise.

SEASON: The Atlantic and central Pacific hurricane seasons are June 1 through Nov. 30. Eastern Pacific: May 15 to Nov. 30; northwestern Pacific season is close to all year, with the most from May to November. The cyclone season in the south Pacific and Australia runs from November to April. The Bay of Bengal has two seasons April to June and September to November.

WHERE IS THE BUSIEST PLACE? The northwestern Pacific where Typhoon Haiyan has just hit. A normal year there involves 27 named storms. Haiyan is the 28th named storm and there has already been a 29th. By comparison the Atlantic averages 11 named storms a year and this year there have been 12, none of them causing major problems.

WHO DECIDES THE NAMES? The lists are maintained by the World Meteorological Organization; the names are ones that are familiar in each region. Names are taken off the list and replaced to avoid confusion if a hurricane causes a lot of damage or deaths. For example, Katrina was retired after it devastated New Orleans in 2005. The Philippines has its own naming system, so Typhoon Haiyan is also being called Yolanda.

HOW DOES EL NINO AFFECT STORMS? During an El Nino — when the central Pacific is warming — there are fewer Atlantic storms. El Ninos shift where storms form, but not the number, for the northwest Pacific and the southwest Pacific. The central Pacific gets more storms during El Nino and the year after. This year has neither an El Nino nor its opposite, a La Nina. It is a neutral year.


SOURCES: World Meteorological Organization, National Oceanic and Atmospheric Administration, Weather Underground.

viernes, 15 de noviembre de 2013


In 1920, Czech writer Karel Čapek wrote a play about human-like machines, thereby inventing the term robot from the Central European word for forced labor...(except that most eastern european (not central) languages use robota as a general term for working)...

jueves, 14 de noviembre de 2013

miércoles, 13 de noviembre de 2013

The Day the Earth Smiled...

On July 19, 2013, in an event celebrated the world over, NASA's Cassini spacecraft slipped into Saturn's shadow and turned to image the planet, seven of its moons, its inner rings -- and, in the background, our home planet, Earth.

With the sun's powerful and potentially damaging rays eclipsed by Saturn itself, Cassini's onboard cameras were able to take advantage of this unique viewing geometry. They acquired a panoramic mosaic of the Saturn system that allows scientists to see details in the rings and throughout the system as they are backlit by the sun. This mosaic is special as it marks the third time our home planet was imaged from the outer solar system; the second time it was imaged by Cassini from Saturn's orbit; and the first time ever that inhabitants of Earth were made aware in advance that their photo would be taken from such a great distance. 


martes, 12 de noviembre de 2013

domingo, 10 de noviembre de 2013