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   Night Sky Calendar - Southern Hemisphere
July 2008
Celestial Object
 
04 - Earth at aphelion (farthest from Sun) at 8h UT. The Sun - Earth distance
0000is 1.01675 a.u. or about 152.1 million km.
06 - Moon near Mars at 16h UT (evening sky). Mag. +1.7.
16 - Moon near Saturn at 20h UT (evening sky). Mag. +0.8.
19 - Jupiter at opposition at 8h UT (mag. -2.7). Bes time to observe the largest
0000planet in in the solar system.
10 - Mars 0.64 from Saturn at 16h UT (47° from Sun, evening sky) Mag.+1.7 & +0.8.
17 - Moon near Jupiter at 14h UT (midnight sky). Mag. -2.7.
18 - Full Moon at 7:59 UT. The full moon of July is called the "Thunder Moon"
0000or "Hay Moon" .
29 - Mercury at superior conjunction at 20h UT (not visible). Passes into the evening sky.
00 0 0 0 0 0// Get the complete calendar version at skymaps.com

The photo was taken by the Hubble Space Telescope and shows a detail of the nebula. This close-up shows a dense cloud of dust and gas, a stellar nursery full of embryonic stars. This cloud is about 8 light-years away from the nebula's central star, not shown in this picture. Located in Sagitarius, the nebula's name means "divided into three lobes".
 




 

Reading Materials | Selected astronomy-related book titles

Roving Mars : Spirit, Opportunity, and the Exploration of the Red Planet
Steve Squyres

NASA's two rovers, Spirit and Opportunity, which are currently driving around Mars, have been astoundingly successful; but as Squyres recounts, they came close to staying earthbound. Buffeted by budgetary and technical problems, the rover missions received the green light only in 2001, giving the engineers and scientists just two years to get ready for a 2003 launch. The resulting freneticism of prelaunch preparation permeates Squyres' blow-by-blow narration of his work, which concentrated on several instruments. A geologist designated as the lead scientist for the missions, Squyres had to negotiate with engineers to fit his stuff on their spacecraft--a fundamental antagonism in the space--exploration business. In fact, Squyres bluntly states he distrusted the lead engineer, Peter Theisinger. The working out of their differences, amid other examples of mollification between engineers and scientists, depicts the daily human drama (from Squyres' viewpoint) of diagnosing and solving technical problems, an angle that ought to augment the author's base readership of space-program fans. Couched in conversational prose, Squyres' enthusiasm for exploring Mars shines brightly.

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Life in the Universe

Jeffrey Bennett, Seth Shostak, Bruce Jakosky

This pioneering book offers an exciting and rigorous introduction to a wide range of sciences, including astronomy, biology, chemistry, geology, and cosmology. Life in the Universe captures the reader's imagination by exploring fundamental pan-scientific questions, such as: "How did life begin on Earth?", "What are the most extreme forms of life currently known?", "How likely is life in our solar system and beyond?", and "What are the challenges of trying to colonize another planet?" The book motivates readers to develop an understanding of the nature and process of science through skillfull writing and a wealth of features. An award-winning author and contributor team spanning the sciences ensures that coverage is complete, authoritative, and accessible. Interdisciplinary coverage and a wealth of exciting topics engage non-science students, introduce them to a range of sciences, and motivate them to explore the nature of science itself. Readers interested in astronomy and life in the universe.

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Carl Sagan's Cosmic Connection: An Extraterrestrial Perspective

Carl Sagan

The late Carl Sagan was one of the most popular, influential, and successful interpreters of astronomy to the American public. In 1973 he published "The Cosmic Connection". He offered a daring view of the universe and his seminal work became a classic of popular science, inspiring a generation of scientists and non-specialist general readers with an enthusiasm for all aspects of science in general, and astronomy in particular. Now Cambridge University Press has reissued a new edition of Sagan's influential book, enhanced with Freeman Dyson's commentary on Sagan's vision and on the importance of "The Cosmic Connection"; Ann Dryan's assessment of Sagan's cultural significance as a champion of science; and David Morrison's discussion of the advances made over the past 30 years and what became of Sagan's predictions. Carl Sagan's Cosmic Connection is "must" reading for all Sagan fans and anyone interested in how his views and predictions have held up over the past three decades of rapid advances in the science of astronomy and the search for extraterrestrial intelligence.

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Exploring Black Holes: Introduction to General Relativity
Edwin F. Taylor, John Archibald Wheeler

A concise, direct examination of general relativity and black holes, Exploring Black Holes provides tools that motivate readers to become active participants in carrying out their own investigations about curved spacetime near earth and black holes. The authors use calculus and algebra to make general relativity accessible, and use quotes from well-known personalities, including Einstein, to offer further insight. Five chapters introduce basic theory. The book also includes seven projects regarding the analysis of major applications. Discussions provide the background needed to carry out projects. The book's projects guide readers as they fill in steps, compute outcomes and carry out their own investigations. For astronomers, mathematicians and people interested in learning about the relativity of black holes.

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Photoshop for Astrophotographers
Jerry Lodriguss

Photoshop for Astrophotographers is a guide to basic digital correction and advanced enhancement techniques for astrophotos in Adobe Photoshop image-processing software. Digital processing allows us to bring out all of the detail and color contained in an original exposure and turn it into a beautiful and breathtaking image.Whether you are a beginning amateur astrophotographer, or a seasoned veteran, you will learn new and exciting techniques to produce visually stunning images! Now, with image processing software, you can turn your computer into a digital darkroom where you can easily improve the brightness and contrast, color balance, and sharpness of images, as well as crop, resize, dodge and burn, remove dust and scratches, adjust the color saturation, and apply filtration. The book gives detailed, step-by-step directions describing methods for properly adjusting, correcting and enhancing images with Photoshop. These techniques will produce the best results, both technically and aesthetically, for output to the web, monitor, printing press, desktop printer, or film recorder. Photoshop for Astrophotographers is not a traditional paper book. It is a digital book on CD that you will be able to view on your computer in any internet web browser such as Microsoft Internet Explorer, Netscape, or Opera. It will offer unique features such as "mouse-overs" that allow before and after comparisons of images by simply holding the mouse cursor over the image. A powerful built-in search engine provides automatic links to the pages containing the search terms. Practice files are included for use in the step-by-step tutorials, as well as comprehensive references and links to more information.

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And more interesting selections:

Bad Astronomy: Misconceptions and Misuses Revealed, from Astrology to the Moon Landing "Hoax" | Philip C. Plait

Astronomy Hacks : Tips and Tools for Observing the Night Sky
Robert Thompson, Barbara Fritchman Thompson

Ancient Astronomy : An Encyclopedia of Cosmologies and Myth
Clive Ruggles

The Universal Book of Astronomy : From the Andromeda Galaxy to the Zone of Avoidance | David Darling

The Restless Universe : Understanding X-Ray Astronomy in the Age of Chandra and Newton | Eric M. Schlegel

Archives of the Universe : A Treasury of Astronomy's Historic Works of Discovery | Marcia Bartusiak

Digital Astrophotography: The State of the Art (Patrick Moore's Practical Astronomy Series) | David Ratledge

 

 




Nightsky calendar (a brief version) by Skymaps & NASA's Space Calendar | Image of FCO - credit: NASA. Hosting generously provided by Site Design Magazine
Design & page layout © kinzi - 2006 | Contact me? kinzikuta@(no-spam)gmail.com

 

Trifid Nebula
M20 | NGC 6514
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The Oort cloud, is a postulated spherical cloud of comets situated about 50,000 to 100,000 AU from the Sun. This is approximately 1000 times the distance from the Sun to Pluto or roughly one light year, almost a quarter of the distance from the Sun to Proxima Centauri, the star nearest the Sun. The Oort cloud would have its inner disk at the ecliptic from the Kuiper belt. Although no direct observations have been made of such a cloud, it is believed to be the source of most or all comets entering the inner solar system (some short-period comets may come from the Kuiper belt), based on observations of the orbits of comets.
Source: Wikipedia

 
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