zakir hussain

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NGC 7789: Caroline's Rose Image Credit & Copyright: Albert Barr http://apod.nasa.gov/apod/ap131026.html Explanation: Found among the rich starfields of the Milky Way toward the constellation Cassiopeia, star cluster NGC 7789 lies about 8,000 light-years away. A late 18th century deep sky discovery of astronomer Caroline Lucretia Herschel, the cluster is also known as Caroline's Rose. Its suggestive appearance is created by the cluster's nestled complex of stars and voids. Now estimated to be 1.6 billion years young, the galactic or open cluster of stars also shows its age. All the stars in the cluster were likely born at the same time, but the brighter and more massive ones have more rapidly exhausted the hydrogen fuel in their cores. These have evolved from main sequence stars like the Sun into the many red giant stars shown with a yellowish cast in this lovely color composite. Using measured color and brightness, astronomers can model the mass and hence the age of the cluster stars just starting to "turn off" the main sequence and become red giants. Over 50 light-years across, Caroline's Rose spans about half a degree (the angular size of the moon) near the center of the wide-field telescopic image. http://www.shutterstock.com/g/ajbarr Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/viewtopic.php?f=9&t=32353 #APOD

Social Media is So Old Even the Romans Had It

What do ancient graffiti, Renaissance pamphlets, and English coffeehouses have in common? They are all forms of social media. Nick Romeo reviews a …

Making 'the best driver's car in the world': A closer look at McLaren's P1 hypercar

McLaren's base of operations for both car development and production lies a few minutes outside of Woking, an unassuming mid-sized town in the middle of the UK. The low-rise, stylish facilities appear from nowhere, and as I sit inside a company car, waiting to get waved through one of many security …

U.S. negotiator in nuclear talks assures Iranians she'll be fair

WASHINGTON – America’s chief negotiator with Iran promised in a broadcast intended for Iranians that she will be a “fair, balanced” participant in talks over Tehran’s<p>nuclear program, despite her comment this month that “deception is part of the DNA” among Iranians.<p>Facing criticism from hard-line …