The Astronomy Shop . ... AstroGuide | Calendar | ... Shop | ... Calendars | ... Wall calendar of observator photographs. Highlights include the Trantula, the Omega and Flaming Star nebulae, the Pinwheel galaxy, star cluster NGC 1850, and the Great Attractor. ... Web . www.astronomy.net . About Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...
... Events . Gallery . ... M101 (Pinwheel Galaxy) 6/8/13 . Finally Finished finalizing this picture. My first picture taken on the Clubs TeleVue 85. The Excessive noise all though fixed as much as possible is still their due to not being a long enough exposure. Still is a decent photo of M101. ... Telescope Used: TeleVue 85 F7 (600mm FL) . ... Exposure Time After Stacking: TBA . ... Picture Galleries . Astronomy Galleries . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...
I revisit the Cepheid-distance determination to the nearby spiral galaxy M101 (Pinwheel Galaxy), in light of several recent investigations questioning the shape of the interstellar extinction curve. I find that the (steeper) extinction curve of Fitzpatrick Massa (2007) is slightly favoured relative to the vastly more cited curve of Cardelli et al. (1989), and this consequently increases the inferred distance modulus by ~0.06 mag. ...
... Bad Astronomy . ... I got a lot of questions this week but galaxies really topped the list of topics. ... MaryCCC, Jack Yomens, Mario Ramero, Dan Holland, Michelle Turner, and Joshua C. They asked me what a galaxy is, can I see one using my own telescope, and, I know we live in a galaxy, but how do we know what kind it is? ... If we lived in an elliptical galaxy, we were somewhere, you know, in this big ball of, of stars, everywhere we look in the sky, we'd see stars scattered all around us. ...
... Planets, moons, asteroids and comets contain resources such as water and minerals, valuable to astronauts and potentially to Earth, with other elements such as platinum as a byproduct of the extraction. ... Lewis hoped we could defray cost s b y "bringing inexpensive products down to Earth. ... We could make travel to Mars cheaper by "bringing just enough fuel [to get there], then use the Martian CO2 atmosphere to go home. One ton of equipment will be able to produce 100 tons of fuel." ...
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