Astrophysics
Astrophysics
Astrophysics is the analysis of the physical structure and evolution of objects studied by means of astronomical observations (e.g., stars, galaxies, radio sources, X-ray sources, quasi-stellar objects). The physical structure of such objects depends on a balance of gravitation, radiation pressure, and centrifugal forces, while their evolution depends on their initial composition and the reactions that take place between matter and radiation. In particular, nuclear reactions create new elements in the interior of stars and provide their major energy source. Detailed analysis discloses important relations between the color of light emitted by a star and its total radiation output; this relation changes with the age of the star. At its life's end, a star may die in a supernova explosion, or it may end up as a white dwarf star, neutron star, or black hole, depending on its mass.
See also Astronomy; Black Hole; Cosmology, Physical Aspects; Gravitation
george f. r. ellis
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+(via+Knight-Ridder%2fTribune+Business+News) "The Register Guard (Eugene, Oregon) (via Knight-Ridder/Tribune Business News)")
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Conventional calendars remain solid business, despite electronic devices.
Newspaper article from: The Register Guard (Eugene, Oregon) (via Knight-Ridder/Tribune Business News); 12/23/2004; 700+ words
; ...average of five calendars, industry experts...growth of electronic calendar devices has not...general manager of Calendars.com, an online...affiliated with the Calendar Club chain. "I...more places to get calendars," said John Lash...marketing director for Calendar Club, which has...
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 "Post-Tribune (IN)")
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CALENDARS FLIPPING OVER A NEW ERA OF SELF-EXPRESSION
Newspaper article from: Post-Tribune (IN); 12/15/1987; 700+ words
; ...editorial content for calendars has produced a Louis L'Amour calendar that contains 12...selling nothing but calendars - and one calendar only - since it switched...people to carry pocket calendars, plus that kitchen calendar. But more than anything...
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 "Mundelein Review (IL)")
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Calendars enter world of art design
Newspaper article from: Mundelein Review (IL); 1/11/1996; ; 669 words
; ...and beauty of calendars, the association...International Calendar Awareness Month...made into a calendar." One of the most popular calendars of all time...print run for a calendar is 25,000. "Historically, calendars used to be handed...
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Calendars for 2003 aren't just meant for keeping dates
Newspaper article from: Daily Breeze; 12/29/2002; ; 700+ words
; ...These days, choosing a calendar can be a major project...thousands of different calendars now," says Dick Mikes, spokesman for the Calendar Marketing Association...10.95, Workman). Calendars continue to get more...The "Paint By Number Calendar" comes with four canvases...
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Calendars.com Predicts Top-Selling Calendars for 2004 Holiday Season; Busy Families, Wacky Humor, Crafts and Dogs Most Popular Calendars for 2005.
Business Wire; 9/22/2004; 700+ words
; ...hobbies and crafts calendars. This year's top-selling calendar is predicted to...according to Calendars.com, the Web's biggest calendar store with the...the time-tested calendar," Levin says. "Calendars remain so popular...
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 "Korea Times (Seoul, Korea)")
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Calendars Greet New Year With Distinctive Themes, Designs.
Newspaper article from: Korea Times (Seoul, Korea); 12/29/2000; 700+ words
; ...lessen the need for calendars printed on paper. For...you can download a web calendar onto your computer screen...that provide online calendars and diaries are www...fashioned off-line paper calendars. One such company is...Company, which has a calendar-making history dating...
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Calendar publisher: iCalPublish 2.0.(Brief Article)(Product/Service Evaluation)
Magazine article from: Macworld; 7/1/2005; 690 words
; ...format. Tiger users can create a calendar group to export multiple calendars as a single calendar, but for people still on Panther...s no way to combine your iCal calendars into one published calendar. Luckily, you can get around...
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Colorful Calendars For a Year and a Day
Newspaper article from: The Washington Post; 11/27/1987; ; 700+ words
; The 1988 calendars are a bargain...year, and some calendar publishers are going...When I saw the calendar, I thought: Oh...but since the calendars have always been...95 pounds. Art Calendars From its permanent...on its engagement calendar, and a selection...
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 "Daily Herald (Arlington Heights, IL)")
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Calendars count on leap years to stay in sync.(Neighbor)
Newspaper article from: Daily Herald (Arlington Heights, IL); 1/1/2003; 700+ words
; ...About Time Series on Calendars" by Brian Williams...Story of Clocks & Calendars: Marking a Millennium...The Story of Our Calendar" by Ruth Brindz...2004. That Gregorian calendar is what most people...purposes. There are other calendars in use for religious...
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Creating calendars that advertise. (Selling Yourself) (column)
Magazine article from: Graphic Arts Monthly; 7/1/1991; ; 700+ words
; ...line. Advertising calendars should have an advertising...beyond the day a calendar is received. To...and even if the calendar itself is eminently...are subjects of calendars that almost never...expensive, custom calendar that looks amazingly...the outstanding calendars about to be ...
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Calendar, Numbers in the
Book article from: Mathematics
Calendar, Numbers in the Calendars have always been based...is still not a perfect calendar. Ancient Calendars Some of the first calendars...like the current Gregorian calendar. Although Egyptian calendars were 365 days long, astronomers...
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Calendars
Encyclopedia entry from: The Gale Encyclopedia of Science
...three main types of calendars. One type of calendar is the lunar calendar...the Sun, a lunar calendar soon gets out of...Thus, most lunar calendars have died out over...surviving luni-solar calendars: the Hebrew (Jewish) calendar, which is used...
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Calendar
Encyclopedia entry from: UXL Encyclopedia of Science
...important time unit in most calendars, since the cycle of...Sun. Making a yearly calendar, however, is no simple...perfect, the Gregorian calendar is accurate to within...The Jewish and Muslim calendars The Jewish calendar is a lunisolar calendar...
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Academic Calendars
Encyclopedia entry from: Encyclopedia of Education
ACADEMIC CALENDARS Academic calendar use at the higher...and "4-1-4" calendars. A longitudinal...traditional semester (a calendar that divides the...frequently than other calendars (with a use rate of 39%). Calendar use by enrollment...
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calendar
Book article from: The Columbia Encyclopedia, Sixth Edition
...insertion of extra days or months into a calendar to make it more accurate). The simplest form of this is shown in ancient calendars which have series of months alternating...prevailing modern method of constructing a calendar in the Christian West came originally...
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