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The Dunhuang Chinese Sky: a Comprehensive Study of the Oldest Known Star Atlas
25/02/09JAHH/v4 1 THE DUNHUANG CHINESE SKY: A COMPREHENSIVE STUDY OF THE OLDEST KNOWN STAR ATLAS JEAN-MARC BONNET-BIDAUD Commissariat à l’Energie Atomique ,Centre de Saclay, F-91191 Gif-sur-Yvette, France E-mail: [email protected] FRANÇOISE PRADERIE Observatoire de Paris, 61 Avenue de l’Observatoire, F- 75014 Paris, France E-mail: [email protected] and SUSAN WHITFIELD The British Library, 96 Euston Road, London NW1 2DB, UK E-mail: [email protected] Abstract: This paper presents an analysis of the star atlas included in the medieval Chinese manuscript (Or.8210/S.3326), discovered in 1907 by the archaeologist Aurel Stein at the Silk Road town of Dunhuang and now held in the British Library. Although partially studied by a few Chinese scholars, it has never been fully displayed and discussed in the Western world. This set of sky maps (12 hour angle maps in quasi-cylindrical projection and a circumpolar map in azimuthal projection), displaying the full sky visible from the Northern hemisphere, is up to now the oldest complete preserved star atlas from any civilisation. It is also the first known pictorial representation of the quasi-totality of the Chinese constellations. This paper describes the history of the physical object – a roll of thin paper drawn with ink. We analyse the stellar content of each map (1339 stars, 257 asterisms) and the texts associated with the maps. We establish the precision with which the maps are drawn (1.5 to 4° for the brightest stars) and examine the type of projections used. -
Thanet Astronomy Group Astronomy for Everyone in Plain English
Thanet Astronomy Group Astronomy for Everyone in Plain English What to see December 29th Constellation (Orion) Stars (Betelguese, Bellatrix, Alnitak, Alnilam, Mintaka, Rigel, Saiph,) Asterism (The Winter Triangle) Stars (Betelguese, Sirius, Procyon) November to March the constellation Orion the Hunter is at its best. There are some 20 prominent stars in this constellation. The brightest and more easily observed stars are the 8 in the main body. The other stars form Orion's right arm with club, and a slain animal in his left hand. These stars are dimmer and difficult to see due to light pollution. At 8:00pm Looking South East at 119° up to 30° you see the star Betelguese, the top left corner of Orion, a red super giant, more than 1½ billion kms in diameter. Look at 127° up to 33° you see the star Bellatrix, the top right corner of Orion, at 8½ million kms in diameter. Look at 128° down to 24° you see Alnitak, the first of three stars side by side, forming Orion's belt. Alnitak, Alnilam (at 128° 25°) and Mintaka (at 129° 26°). Probably one of the more easily recognised groups of stars in this area of sky. Look at 137° down to 21° you see the star Rigel, the bottom right corner of Orion. A blue/white super giant, 108 million kms in diameter. Look at 130° down to 16° you see the star Saiph the bottom left corner of Orion, nearly 31 million kms in diameter. Orion Stars Orion the Hunter In August I wrote about The Summer Triangle. -
C. Mintaka, Alnitak, Alnilam
Post-18.1: This graph shows the functional form of the dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? a. ~ 1.00 arcsec b. ~ 2.2 pc c. ~ 10 pc ©2014 W. W. Norton & Company, Inc. 8 Post-18.1: This graph shows the functional form of the dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? a. ~ 1.00 arcsec b. ~ 2.2 pc c. ~ 10 pc ©2014 W. W. Norton & Company, Inc. 9 Post-18.2: The Moon never stops in its orbit; however, it is possible to get an exact measurement of its parallax and thus its distance at any given moment. How would we get the parallax shift of the Moon? a. Take simultaneous measurements from two locations. b. Take two measurements at different times from one location. c. Take two measurements from the same location at the same phase of the Moon. ©2014 W. W. Norton & Company, Inc. 10 Post-18.2: The Moon never stops in its orbit; however, it is possible to get an exact measurement of its parallax and thus its distance at any given moment. How would we get the parallax shift of the Moon? a. Take simultaneous measurements from two locations. b. Take two measurements at different times from one location. -
Winter Constellations
Winter Constellations *Orion *Canis Major *Monoceros *Canis Minor *Gemini *Auriga *Taurus *Eradinus *Lepus *Monoceros *Cancer *Lynx *Ursa Major *Ursa Minor *Draco *Camelopardalis *Cassiopeia *Cepheus *Andromeda *Perseus *Lacerta *Pegasus *Triangulum *Aries *Pisces *Cetus *Leo (rising) *Hydra (rising) *Canes Venatici (rising) Orion--Myth: Orion, the great hunter. In one myth, Orion boasted he would kill all the wild animals on the earth. But, the earth goddess Gaia, who was the protector of all animals, produced a gigantic scorpion, whose body was so heavily encased that Orion was unable to pierce through the armour, and was himself stung to death. His companion Artemis was greatly saddened and arranged for Orion to be immortalised among the stars. Scorpius, the scorpion, was placed on the opposite side of the sky so that Orion would never be hurt by it again. To this day, Orion is never seen in the sky at the same time as Scorpius. DSO’s ● ***M42 “Orion Nebula” (Neb) with Trapezium A stellar nursery where new stars are being born, perhaps a thousand stars. These are immense clouds of interstellar gas and dust collapse inward to form stars, mainly of ionized hydrogen which gives off the red glow so dominant, and also ionized greenish oxygen gas. The youngest stars may be less than 300,000 years old, even as young as 10,000 years old (compared to the Sun, 4.6 billion years old). 1300 ly. 1 ● *M43--(Neb) “De Marin’s Nebula” The star-forming “comma-shaped” region connected to the Orion Nebula. ● *M78--(Neb) Hard to see. A star-forming region connected to the Orion Nebula. -
IBAK Sewer and Manhole Inspection Systems
IBAK Sewer and Manhole Inspection Systems Table of contents Hindsight – Insight – Foresight ..................................... 4 Cable drums and cable winches IBAK Sewer and Manhole Inspection Systems ............ 6 Extension Kit ............................................................... 44 IBAK KT 180 ............................................................... 46 Cameras IBAK KW 180 .............................................................. 48 IBAK HYDRUS .............................................................. 8 IBAK KW 305/310/505 ................................................ 50 IBAK NANO / NANO L ................................................. 10 IBAK KW LISY Synchron ............................................ 52 IBAK JUNO ................................................................. 12 IBAK POLARIS ............................................................ 14 Compact push system IBAK ORION .............................................................. 16 IBAK HSP .................................................................... 54 IBAK ORION L ............................................................ 18 IBAK MiniLite .............................................................. 56 IBAK ORPHEUS 2 ...................................................... 20 IBAK ORPHEUS 2 HD ................................................ 22 Control units/systems IBAK ARGUS 5 ........................................................... 24 IBAK BK 3.5 ............................................................... -
Winter Observing Notes
Wynyard Planetarium & Observatory Winter Observing Notes Wynyard Planetarium & Observatory PUBLIC OBSERVING – Winter Tour of the Sky with the Naked Eye NGC 457 CASSIOPEIA eta Cas Look for Notice how the constellations 5 the ‘W’ swing around Polaris during shape the night Is Dubhe yellowish compared 2 Polaris to Merak? Dubhe 3 Merak URSA MINOR Kochab 1 Is Kochab orange Pherkad compared to Polaris? THE PLOUGH 4 Mizar Alcor Figure 1: Sketch of the northern sky in winter. North 1. On leaving the planetarium, turn around and look northwards over the roof of the building. To your right is a group of stars like the outline of a saucepan standing up on it’s handle. This is the Plough (also called the Big Dipper) and is part of the constellation Ursa Major, the Great Bear. The top two stars are called the Pointers. Check with binoculars. Not all stars are white. The colour shows that Dubhe is cooler than Merak in the same way that red-hot is cooler than white-hot. 2. Use the Pointers to guide you to the left, to the next bright star. This is Polaris, the Pole (or North) Star. Note that it is not the brightest star in the sky, a common misconception. Below and to the right are two prominent but fainter stars. These are Kochab and Pherkad, the Guardians of the Pole. Look carefully and you will notice that Kochab is slightly orange when compared to Polaris. Check with binoculars. © Rob Peeling, CaDAS, 2007 version 2.0 Wynyard Planetarium & Observatory PUBLIC OBSERVING – Winter Polaris, Kochab and Pherkad mark the constellation Ursa Minor, the Little Bear. -
Educator's Guide: Orion
Legends of the Night Sky Orion Educator’s Guide Grades K - 8 Written By: Dr. Phil Wymer, Ph.D. & Art Klinger Legends of the Night Sky: Orion Educator’s Guide Table of Contents Introduction………………………………………………………………....3 Constellations; General Overview……………………………………..4 Orion…………………………………………………………………………..22 Scorpius……………………………………………………………………….36 Canis Major…………………………………………………………………..45 Canis Minor…………………………………………………………………..52 Lesson Plans………………………………………………………………….56 Coloring Book…………………………………………………………………….….57 Hand Angles……………………………………………………………………….…64 Constellation Research..…………………………………………………….……71 When and Where to View Orion…………………………………….……..…77 Angles For Locating Orion..…………………………………………...……….78 Overhead Projector Punch Out of Orion……………………………………82 Where on Earth is: Thrace, Lemnos, and Crete?.............................83 Appendix………………………………………………………………………86 Copyright©2003, Audio Visual Imagineering, Inc. 2 Legends of the Night Sky: Orion Educator’s Guide Introduction It is our belief that “Legends of the Night sky: Orion” is the best multi-grade (K – 8), multi-disciplinary education package on the market today. It consists of a humorous 24-minute show and educator’s package. The Orion Educator’s Guide is designed for Planetarians, Teachers, and parents. The information is researched, organized, and laid out so that the educator need not spend hours coming up with lesson plans or labs. This has already been accomplished by certified educators. The guide is written to alleviate the fear of space and the night sky (that many elementary and middle school teachers have) when it comes to that section of the science lesson plan. It is an excellent tool that allows the parents to be a part of the learning experience. The guide is devised in such a way that there are plenty of visuals to assist the educator and student in finding the Winter constellations. -
List of Section 13F Securities
List of Section 13F Securities 1st Quarter FY 2004 Copyright (c) 2004 American Bankers Association. CUSIP Numbers and descriptions are used with permission by Standard & Poors CUSIP Service Bureau, a division of The McGraw-Hill Companies, Inc. All rights reserved. No redistribution without permission from Standard & Poors CUSIP Service Bureau. Standard & Poors CUSIP Service Bureau does not guarantee the accuracy or completeness of the CUSIP Numbers and standard descriptions included herein and neither the American Bankers Association nor Standard & Poor's CUSIP Service Bureau shall be responsible for any errors, omissions or damages arising out of the use of such information. U.S. Securities and Exchange Commission OFFICIAL LIST OF SECTION 13(f) SECURITIES USER INFORMATION SHEET General This list of “Section 13(f) securities” as defined by Rule 13f-1(c) [17 CFR 240.13f-1(c)] is made available to the public pursuant to Section13 (f) (3) of the Securities Exchange Act of 1934 [15 USC 78m(f) (3)]. It is made available for use in the preparation of reports filed with the Securities and Exhange Commission pursuant to Rule 13f-1 [17 CFR 240.13f-1] under Section 13(f) of the Securities Exchange Act of 1934. An updated list is published on a quarterly basis. This list is current as of March 15, 2004, and may be relied on by institutional investment managers filing Form 13F reports for the calendar quarter ending March 31, 2004. Institutional investment managers should report holdings--number of shares and fair market value--as of the last day of the calendar quarter as required by Section 13(f)(1) and Rule 13f-1 thereunder. -
A Review on Substellar Objects Below the Deuterium Burning Mass Limit: Planets, Brown Dwarfs Or What?
geosciences Review A Review on Substellar Objects below the Deuterium Burning Mass Limit: Planets, Brown Dwarfs or What? José A. Caballero Centro de Astrobiología (CSIC-INTA), ESAC, Camino Bajo del Castillo s/n, E-28692 Villanueva de la Cañada, Madrid, Spain; [email protected] Received: 23 August 2018; Accepted: 10 September 2018; Published: 28 September 2018 Abstract: “Free-floating, non-deuterium-burning, substellar objects” are isolated bodies of a few Jupiter masses found in very young open clusters and associations, nearby young moving groups, and in the immediate vicinity of the Sun. They are neither brown dwarfs nor planets. In this paper, their nomenclature, history of discovery, sites of detection, formation mechanisms, and future directions of research are reviewed. Most free-floating, non-deuterium-burning, substellar objects share the same formation mechanism as low-mass stars and brown dwarfs, but there are still a few caveats, such as the value of the opacity mass limit, the minimum mass at which an isolated body can form via turbulent fragmentation from a cloud. The least massive free-floating substellar objects found to date have masses of about 0.004 Msol, but current and future surveys should aim at breaking this record. For that, we may need LSST, Euclid and WFIRST. Keywords: planetary systems; stars: brown dwarfs; stars: low mass; galaxy: solar neighborhood; galaxy: open clusters and associations 1. Introduction I can’t answer why (I’m not a gangstar) But I can tell you how (I’m not a flam star) We were born upside-down (I’m a star’s star) Born the wrong way ’round (I’m not a white star) I’m a blackstar, I’m not a gangstar I’m a blackstar, I’m a blackstar I’m not a pornstar, I’m not a wandering star I’m a blackstar, I’m a blackstar Blackstar, F (2016), David Bowie The tenth star of George van Biesbroeck’s catalogue of high, common, proper motion companions, vB 10, was from the end of the Second World War to the early 1980s, and had an entry on the least massive star known [1–3]. -
Guidepost Constellations Map The
ConstellationsTitleTitle here here The Horizon Globe SE comes with 16 of the most important constellations.* Equipment needed: We call four of them Guideposts. These four are easy to find, and constellations they will point you to all the rest of the constellations. Any time you see stars, you will be able to find at least one of the Guidepost constellations. Orion ORION - Guidepost #1 Very bright and easy to find. Dipp ig e B r BIG DIPPER - Guidepost #2 Tied with Orion for being easy to find. siop as ei C a CASSIOPEIA - Guidepost #3 Almost as easy to find as the Big Dipper, and in a great spot. gn Cy us CYGNUS - Guidepost #4 Part of the Summer Triangle, and very distinctive. If Cygnus is out you will be able to find it. The other 12 constellations included with your Horizon Globe are significant for a different reason; they helped ancient astronomers tell the time of year and time of night before clocks were invented. You probably know the names of these special constellations, they are the signs of the Zodiac. The Zodiac comprises Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. These twelve constellations all fit on the ecliptic. Coincidence? In the next chapter we’ll get started by looking at one very important constellation. The first Guidepost, Orion, will help you find and remember the rest of the constellations. * The Big Dipper is technically an asterism, not a constellation. A constellation is one of 88 star groupings that have a definite names. -
A Collection of Curricula for the STARLAB Greek Mythology Cylinder
A Collection of Curricula for the STARLAB Greek Mythology Cylinder Including: A Look at the Greek Mythology Cylinder Three Activities: Constellation Creations, Create a Myth, I'm Getting Dizzy by Gary D. Kratzer ©2008 by Science First/STARLAB, 95 Botsford Place, Buffalo, NY 14216. www.starlab.com. All rights reserved. Curriculum Guide Contents A Look at the Greek Mythology Cylinder ...................3 Leo, the Lion .....................................................9 Introduction ......................................................3 Lepus, the Hare .................................................9 Andromeda ......................................................3 Libra, the Scales ................................................9 Aquarius ..........................................................3 Lyra, the Lyre ...................................................10 Aquila, the Eagle ..............................................3 Ophuichus, Serpent Holder ..............................10 Aries, the Ram ..................................................3 Orion, the Hunter ............................................10 Auriga .............................................................4 Pegasus, the Winged Horse..............................11 Bootes ..............................................................4 Perseus, the Champion .....................................11 Cancer, the Crab ..............................................4 Phoenix ..........................................................11 Canis Major, the Big Dog -
Asterisms More Asterisms Lyra—Another Real Constellation
A Constellation is… Asterisms …a region of the z These are familiar sky, within official shapes but not official borders set in 1928 constellations by the IAU. • Often recognizable by a pattern or The summer triangle grouping of stars. • Some patterns, like the Winter Triangle, span several constellations. © 2004 Pearson Education Inc., publishing as © 2004 Pearson Education Inc., publishing as Addison-Wesley Addison-Wesley Cygnus More asterisms “a real constellation” z The big dipper z Actually part of Ursa Major Image from: z The Big Bear http://www.physics.csbsju.edu/astro/constellations/ursa_major_l.html z Or Big Raccoon? © 2004 Pearson Education Inc., publishing as © 2004 Pearson Education Inc., publishing as Addison-Wesley Addison-Wesley Lyra—another real constellation Prominent Constellations -Sagittarius. © 2004 Pearson Education Inc., publishing as © 2004 Pearson Education Inc., publishing as Addison-Wesley Addison-Wesley 1 Scorpius Orion z Betelguese z Orion Nebula © 2004 Pearson Education Inc., publishing as © 2004 Pearson Education Inc., publishing as Addison-Wesley Addison-Wesley z Betelguese Not what it appears! Orion Nebula Radius of Earths orbit about sun! Planetary systems forming © 2004 Pearson Education Inc., publishing as © 2004 Pearson Education Inc., publishing as within! Addison-Wesley Addison-Wesley The view from here: The Celestial Sphere Celestial Astrononomy z The sky above looks like z Even though we know the Earth goes a dome…a hemisphere.. around the sun and not vice versa.. z If we imagine the sky z Don’t we? around the entire Earth, z 1/5 adults in USA don’t! we have the celestial sphere. z Its useful to think about a sphere of celestial objects surrounding the Earth z This a 2-dimensional representation of the sky z The signs of the zodiac are the constelltions that are along the sun’s Because it represents path—the ecliptic! our view from Earth, we place the Earth in the © 2004 Pearson Education Inc., publishing as © 2004 Pearson Education Inc., publishing as Addison-Wesley Addison-Wesleycenter of this sphere.