Tuesday, 29 May 2007

28 New Exoplanets Discovered

Astronomers have discovered 28 new planets outside of our solar system, increasing to 236 the number of known exoplanets, revealing that planets can exist around a broad spectrum of stellar types-from tiny, dim stars to giants.
"We added 12 percent to the total in the last year, and we're very proud of that," said one of the study team members Jason Wright of the University of California at Berkeley. "This provides new planetary systems so that we can study their properties as an ensemble."
The planets are among 37 new objects spotted within the past year. Seven of the objects are failed stars called brown dwarfs, with masses that dwarf the largest, Jupiter-sized planets but too small to sustain the nuclear reactions necessary for stellar ignition.
John Johnson of the University of California at Berkeley and his colleagues presented the findings here today at a meeting of the American Astronomical Society (AAS).
Astronomers don't directly spot extrasolar planets, but rather look for stellar wobbles caused by orbiting planets. The planet's size and distance from the parent star affect how strong or weak of a wobble, and more sophisticated techniques for measuring the stellar wobbles has led to an ever-lengthening list of such outer planets. Now they can detect wobbles of a meter per second compared with the 10-meter limit just 15 years ago.

Contents of the day

Article of the Day

Geisha

American soldiers returning home after WWII brought with them many misconceptions about traditional Japanese geisha culture, including the now widespread Western belief that geisha are prostitutes. In fact, geisha are highly-trained entertainers who are skilled in the arts of singing, dancing, conversing, and playing traditional instruments. Geisha are known for their recognizable white makeup, elaborate dress, and complex hairstyles. How must geisha sleep in order to protect these hairdos? More... Discuss

This Day in History

World Trade Center Opens in New York City (1973)

With seven buildings and a shopping concourse, the World Trade Center in lower Manhattan was the largest commercial complex in the world before it was destroyed in the September 11, 2001, terrorist attacks. Its most prominent structures were the 110-story rectangular Twin Towers, which, at more than 1,360 ft (415 m) tall, were the tallest buildings in the world until the Sears Tower surpassed them in 1974. How did the construction of the complex lead to the expansion of the island of Manhattan? More... Discuss

Today's Birthday

McKinley Morganfield, AKA Muddy Waters (1913)

As a teenager in Mississippi, Waters played traditional country blues, but after settling in Chicago in the 1940s, he switched to a more urban style with amplified instruments. He soon became known for his driving slide guitar technique and darkly expressive vocal style. From the 1950s on, Waters recorded, toured, and played various music festivals. His electric blues influenced myriad musicians, including Elvis Presley and Bob Dylan. What world-famous band took its name from one of his songs? More... Discuss

In the News

tinder discuss

Definition:(noun) Readily combustible material, such as dry twigs, used to kindle fires.
Synonyms:kindling, spunk, touchwood, punk
Usage:One of the fishermen struck light from a stone, set fire to some tinder, and by the aid of a match lit a lantern.

Quote of the Day
It is equally offensive to speed a guest who would like to stay and to detain one who is anxious to leave.
Homer
(900 BC-800 BC)
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