Comments on: Cosmic Quiz – Let’s talk about star colors http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors Clark Planetarium Mon, 08 Mar 2010 20:15:43 -0700 http://wordpress.org/?v=2.8.6 hourly 1 By: Richard http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors/comment-page-1#comment-235 Richard Mon, 11 Jan 2010 14:33:57 +0000 http://www.clarkplanetarium.com/blog/?p=301#comment-235 Hmmm, never heard the term used with meters. Seems kind of silly, but here goes. 'Yotta' is the prefix meaning 'septillion,' or 10^24 (1 followed by 24 zeros). Since one light year is approximately 9.5x10^15 meters, 4 light years = 38x10^15 meters, or 38 quadrillion meters. So, there are 3.8x10^-8 yottameters in 4 light years, or 38 one-billionths of a yottameter in 4 light years. Don't know why you picked 4 light years, but the distance between Sun and Proxima Centauri, our nearest neighboring star, is 4.2 light years. So, there are 3.99x10^-8 yottameters in one trip to Proxima Centauri. So, it would require 1.25x10^7 round trips to Proxima Centauri in order to have travelled one yottameter, or 12.5 million round trips. I'm done. I hope my math is right. I'm doing this at 7 am... Hmmm, never heard the term used with meters. Seems kind of silly, but here goes. ‘Yotta’ is the prefix meaning ’septillion,’ or 10^24 (1 followed by 24 zeros). Since one light year is approximately 9.5×10^15 meters, 4 light years = 38×10^15 meters, or 38 quadrillion meters. So, there are 3.8×10^-8 yottameters in 4 light years, or 38 one-billionths of a yottameter in 4 light years. Don’t know why you picked 4 light years, but the distance between Sun and Proxima Centauri, our nearest neighboring star, is 4.2 light years. So, there are 3.99×10^-8 yottameters in one trip to Proxima Centauri. So, it would require 1.25×10^7 round trips to Proxima Centauri in order to have travelled one yottameter, or 12.5 million round trips.

I’m done. I hope my math is right. I’m doing this at 7 am…

]]> By: cyrus http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors/comment-page-1#comment-232 cyrus Sat, 09 Jan 2010 20:24:12 +0000 http://www.clarkplanetarium.com/blog/?p=301#comment-232 how many yottameters are in 4 lightyears? how many yottameters are in 4 lightyears?

]]> By: Richard http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors/comment-page-1#comment-213 Richard Mon, 04 Jan 2010 16:46:07 +0000 http://www.clarkplanetarium.com/blog/?p=301#comment-213 It really varies image by image. Many images from the Hubble Space Telescope include data from the invisible ranges of the EM spectrum (ultraviolet, infrared, etc.). These data sets are artificially colored, to be sure. The visible spectrum data are natural colors, though enhanced through extremely long exposure times, and software enhancement. Your eyes see only grays because you eye cannot take long exposure-time photographs. It really varies image by image. Many images from the Hubble Space Telescope include data from the invisible ranges of the EM spectrum (ultraviolet, infrared, etc.). These data sets are artificially colored, to be sure. The visible spectrum data are natural colors, though enhanced through extremely long exposure times, and software enhancement. Your eyes see only grays because you eye cannot take long exposure-time photographs.

]]> By: Roger Nadon http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors/comment-page-1#comment-205 Roger Nadon Thu, 31 Dec 2009 18:38:52 +0000 http://www.clarkplanetarium.com/blog/?p=301#comment-205 But are all the photos we see on NASA real color? Dust and nebulae almost look like false color. Also, I remember a Soviet cosmonaut saying that when he was up in orbit everything looked grey! But are all the photos we see on NASA real color? Dust and nebulae almost look like false color. Also, I remember a Soviet cosmonaut saying that when he was up in orbit everything looked grey!

]]> By: Richard http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors/comment-page-1#comment-198 Richard Mon, 28 Dec 2009 15:29:56 +0000 http://www.clarkplanetarium.com/blog/?p=301#comment-198 Other than the O-B-A-F-G-K-M classification discussed in the blog post, or the color itself, there is no name for star color. Other than the O-B-A-F-G-K-M classification discussed in the blog post, or the color itself, there is no name for star color.

]]> By: Bosan http://www.clarkplanetarium.com/blog/cosmic-quiz-lets-talk-about-star-colors/comment-page-1#comment-194 Bosan Sun, 27 Dec 2009 15:27:44 +0000 http://www.clarkplanetarium.com/blog/?p=301#comment-194 What is the description of stars there are colored, is there a special definition or name? What is the description of stars there are colored, is there a special definition or name?

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