| The_Wichita_Chapter_of_ASHRAE This site describes the activities of the Wichita, Kansas chapter of the ASHRAE. |
| University_of_Illinois_at_Urbana-Champaign Student chapter overview, news, event and activity information, design projects, member resumes, officer list, mailing list, and membership information. |
| The_Aesthetics_of_Symmetry A brief digression into how people perceive symmetrical patterns -- what makes them boring, interesting, or overly intricate |
| Back_to_Square_One Includes description, solutions and other resources on this cube-like puzzle. |
| Critical_Math Articles and images on recreational math from fractals and magic squares to mathemorchids and Galois. |
| Cryptarithms_Online 70 brain-teasers; a Primer on Cryptarithmetic; books and links to alphametics on the Web. |
| CuriousMath Include news, math tricks, methods, facts, trivia, mostly posted by users. |
| David_Singmaster__List_of_Available_Material Teaching and recreational items in this personal collection. |
| The_Diamond_16_Puzzle New version of the classic puzzle using row/column/quadrant permutations to display symmetries of graphic designs. Has link to a site on the underlying mathematics (Diamond Theory). |
| A_Disproof_of_Pythagoras\'_Theorem? A method of disproving the Theorem of Pythagoras is presented. The author is adamant that this is intended only as a puzzle to find the mistake in the arguments, and not as a serious proposal. |
| The_Eugène_Strens_Recreational_Mathematics_Collection A special collection at the University of Calgary, including the archives of Martin Gardner. There is a searchable online index. |
| Eureka The annual journal of the Archimedeans, the mathematical society of the University of Cambridge. It regularly contains articles on recreational mathematics. |
| Fair_Dice Contains a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures. |
| Famous_Curves Visual animations of famous curves. |
| Fast_Arithmetic_Tips Three categories: defensive - know to check an answer, offensive - fast mental calculations, and math magic. |
| Fibonacci_numbers_and_the_Pascal_triangle The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian. |
| Final_Answers Numerous facts including formulas, magic tricks, fallacies, recreations compiled by Dr. Gerald P. Michon. |
| Fun_With_Mathematics Includes pages on the topics of primes, fibonacci numbers, PI computation, data encryption and links to calculator programs. |
| Gardner_Index Rough index to the fifteen books containing Martin Gardner's Mathematical Games articles from Scientific American. |
| Geometric_Packing_Problems By Joseph Malkevitch: "Given one shape X how and when can one pack identical copies of this shape into another shape Y?" |
| HAKMEM A collection of problems from MIT. Work reported herein was conducted at the Artificial Intelligence Laboratory, a Massachusetts Institute of Technology research program. |
| How_To_Manually_Find_A_Square_Root The way to do find a square root without a calculator. |
| Iamond A page on polyiamond puzzles. Includes many pages on tessellation. |
| Jlpe\'s_Number_Recreations_Page Features original number recreations by the author, such as generalized perfect numbers, digital diversions, diophantine equations, didactic numbers, and number theory. |
| Look_and_Say_Sequence_Generator Creates a special kind of summation formula created by John Conway. |
| MAA_Library_List_in_Recreational_Mathematics Book list split into categories. Includes title, author, publisher and date information about each book. |
| MAT_007_I_News A newsletter edited by undergraduates of the Department of Mathematics at the University of Toronto. Includes some online copies. |
| Math_Forum__2001_Mathematics_Game A contest that asks to write all integers from 1 to 100 using only the digits 2,0,0,1 and arithmetic operations. |
| Math_Forum__2002_Mathematics_Game A contest where the contestants have to write all integers from 1 to 100 using only the digits 2,0,0,2 and arithmetic operations. |
| Math_Forum__Algebra_Problem_of_the_Week View this week's algebra problem or those of previous weeks. |
| Math_in_the_Movies A guide to major motion pictures with scenes of real mathematics. |
| Math_Magic_By_Computer Interactive java puzzles and activities in different mathematical topics. |
| Mathematical_Diversions Mostly original diversions in mathematics and word play. |
| Mathematical_Fiction A list of mathematical fictional movies, books, stories, plays and shows. Split into categories including children's books. Can be sorted by mathematical content and literary quality. |
| Mathematical_Induction A page of uncommon problems, most closely connected with number theory. |
| Mathematical_Lego_Sculptures Designed and built by Andrew Lipson. Images and LDraw files. |
| Mathematical_Problems_-_Problem_Solving Mathematics Hots (Problems) by Bruno Kevius |
| Mathematical_Quotation_Server Furman University Mathematical Quotation Server - random or searchable math quotes. |
| Mathematical_Quotation_Server A collection of mathematical quotations culled from many sources. You may conduct a keyword search through the quotation database. |
| Mathematical_Spectrum Mathematical Spectrum is a magazine for students and teachers of mathematics in universities, colleges and schools worldwide. It may be read by anybody interested in mathematics as a recreation. |
The Horsehead Nebula, left from it is Alnitak (Zeta Orionis), the left belt star of Orion.Photo: NasaSic itur ad astra Astronomy: Stars & Planets | © Jumk.de Webprojects | Imprint & PrivacyInformations about other galaxies, the stars in our Milky Way and the objects in the Solar System.In German: Sterne und PlanetenBook tip: The Hundred Greatest Stars
You'll find other interesting astronomy articles on astronomyexpert.co.ukIf you want to observe yourself, have a look at nightskyinfo.comThis website was created by a layman. Although I'm trying to give details as correct and precise as possible, mistakes can appear. Also not all dates are as complete as they should be. If you detect mistakes or have supplemental informations, feel free to send an e-mail to juergen@jumk.de. You can as well suggest stars and other objects that should be included into this website. Also feel free to correct my English, which isn't my first language._uacct = "UA-260611-4";urchinTracker();