08 novembro 2014

Updated Science: Great Scientists: Pythagoras

Great Scientists: Pythagoras

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Polar Ring Galaxy NGC 660

NGC 660 is featured in this cosmic snapshot, a sharp composite of broad and narrow band filter image data from the Gemini North telescope on Mauna Kea. Over 20 million light-years away and swimming within the boundaries of the constellation Pisces, NGC 660's peculiar appearance marks it as a polar ring galaxy. A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk. The bizarre-looking configuration could have been caused by the chance capture of material from a passing galaxy by a disk galaxy, with the captured debris eventually strung out in a rotating ring. The violent gravitational interaction would account for the myriad pinkish star forming regions scattered along NGC 660's ring. The polar ring component can also be used to explore the shape of the galaxy's otherwise unseen dark matter halo by calculating the dark matter's gravitational influence on the rotation of the ring and disk. Broader than the disk, NGC 660's ring spans over 50,000 light-years.

from NASA http://ift.tt/1uKiA1h

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Dúvidas sobre simpatias

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Do I need a parent’s permission to get an abortion?

Do I need a parent’s permission to get an abortion?:



Someone asked us:

im pregnant and definitely want an abortion. im under 18. does that matter?

Abortion laws vary from state to state. It’s not illegal for a minor to get an abortion, but if you’re under 18, your state might require one or both of your parents to give you permission…

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November 8th 1519: Cortés enters Tenochtitlan On this day in...

The Conquest of Tenochtitlan by an unknown artist

Hernán Cortés (1485 - 1547)

Plaque commemorating site where Moctezuma and Cortés met

November 8th 1519: Cortés enters Tenochtitlan

On this day in 1519, Spanish conquistador Hernán Cortés entered the Aztec capital of Tenochtitlan where he was greeted with a celebration by king Moctezuma. At the time, Tenochtitlan is believed to have been one of the largest and most advanced cities in the world, dominating most great European cities. Cortés and his men were expelled from the city in 1520 after some of the Spanish soldiers massacred Aztec civilians during a festival. They later returned with Tlaxcalan allies to siege Tenochtitlan; the attack almost completely destroyed the great city, and the Spanish took Tenochtitlan in 1521. This was a major event in the Spanish conquest of the Americas and the fall of the Aztec Empire.

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The “half your age plus seven” rule for dating has been around since at least 1901.

The “half your age plus seven” rule for dating has been around since at least 1901.

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FAMOUS FRONT DOORS Great cartoon by John Atkinson via...


Great cartoon by John Atkinson via http://ift.tt/Lj9LRR

Like psychology? Go Here: http://ift.tt/1eWNk1f

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A Hollywood Survivor

Born in Knoxville, Tennessee, Lillian Randolph started on local radio as a singer, then broke onto the national scene when she moved to Hollywood in the 1930s and acted on radio and in movies, mostly uncredited. She’d appear in everything from Tom and Jerry cartoons to radio programs The Billie Burke Show. Later in her career she appeared in TV versions of Amos ‘n’ Andy, Beulah, and other programs. Her most famous role was Annie in Its A Wonderful Life, though she only had three scenes.

Though she was criticized by the NAACP and community activitists for the stereotypical roles she took, Randolph defended her right to work as an actress. It also allowed her to mentor young actors like Lena Horne on how to survive Hollywood. Randolph continued to do films and make television appearances, including Sanford and Son, Roots, and various commercials, until her death in 1980.

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