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Chandra's Previous Numbers Game Results - 2006Question 21: The Bullet galaxy cluster 1E0657-56 is one of the most massive gravitationally bound objects in the universe. Approximately how many times more massive is it than our Milky Way galaxy? (August 22 - October 24, 2006)Question 20: Sound waves travel at a speed of about 1100 feet per second in Earth's atmosphere, which has a temperature of about 20 degrees Celsius. What is the speed of sound in the 2 million-degree Celsius gas of the supernova remnant IC 443? (June 7 - August 22, 2006) Question 19: Quasar Lifetime: A quasar is thought to be an extremely energetic phase in the evolution of certain galaxies during which large amounts of gas flow into a central supermassive black hole. Approximately how long does the quasar phase last? (March 22 - June 7, 2006) Question 18: About what height above the Earth's surface were the auroral X-rays observed by Chandra produced? (January 3 - March 22, 2006) Question 17: If the Sun were located in the dense star cluster Westerlund 1, about how many stars would appear brighter than Sirius, the brightest star in Earth s night sky? (November 2, 2005 - January 3, 2006) |
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Revised: June 12, 2007
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