Journal of the Association of Lunar & Planetary Observers
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Transit of Venus Presentation
http://sunearthday.nasa.gov/2012/transit/webcast.php Venus visible Venus with the unaided eye: "morning star" or the Earth "evening star. • Similar to Earth: – diameter: 12,103 km – 0.95 Earth’s – mass 0.89 of Earth's – few craters -- young surface – densities, chemical compositions are similar • rotation unusually slow (Venus day = 243 Earth days -- longer than Venus' year) • rotation retrograde • periods of Venus' rotation and of its orbit are synchronized -- always same face toward Earth when the two planets are at their closest approach • greenhouse effect -- surface temperature hot enough to melt lead M ikhail Lomonosov, june 5, 1761 discovered, during a transit, that V enus has an atmosphere The atmosphere is is composed mostly of carbon dioxide. There are several layers of clouds, many kilometers thick, composed of sulfuric acid. Mariner 10 Image of Venus V enera 13 Venus’ orbit is inclined (by 3.39 degrees) relative to the ecliptic If in the same plane we would have 5 transits in 8 years Venus: 13 years , Earth: 8 years Each time Earth completes 1.6 orbits, Venus catches up to it after 2.6 of its orbits Progress of the 2004 Transit of Venus pictured from NASA's Soho solar observatory. Credit: NASA Ascending (A) or Duration since last transit Date of transit Descending (D) node (years and months) 6 December 1631 A 4 December 1639 A 8 yrs 6 June 1761 D 121 yrs 6 months 3 June 1769 D 8 yrs 9 December 1874 A 105 yrs 6 months 6 December 1882 A 8 yrs 8 June 2004 D 121 yrs 6 months 5 June 2012 D 8 yrs 11 December 2117 A 105 yrs 6 months 8 December 2125 A 8 yrs In 6000 years 81 transits only Venus’ Role in History Copernican System vs Ptolemaic System http://astro.unl.edu/classaction/animations/renaissance/venusphases.html Venus’ Role in History Size of the Solar System - Revealed! • Kepler predicted the transit of December 1631 (though not observed!) and 120 year cycle. -
TAKE-HOME EXP. # 1 Naked-Eye Observations of Stars and Planets
TAKE-HOME EXP. # 1 Naked-Eye Observations of Stars and Planets Naked-eye observations of some of the brightest stars, constellations, and planets can help us locate our place in the universe. Such observations—plus our imaginations—allow us to actively participate in the movements of the universe. During the last few thousand years, what humans have said about the universe based on naked-eye observations of the night and day skies reveals the tentativeness of physical models based solely on sensory perception. Create, in your mind's eye, the fixed celestial sphere. See yourself standing on the Earth at Observer's the center of this sphere. As you make the zenith + star-pattern drawings of this experiment, your perception may argue that the entire sphere of fixed star patterns is moving around the Earth and you. To break that illusion, you probably have to consciously shift your frame of º reference—your mental viewpoint, in this 50 up from the horizon case— to a point far above the Earth. From South there you can watch the globe of Earth slowly Observer on local horizon plane rotate you , while the universe remains essentially stationary during your viewing It is you that turns slowly underneath a fixed and unchanging pattern of lights. Naked eye observations and imagination has led to constellation names like "Big Bear" or "Big Dipper". These names don't change anything physically —except, and very importantly, they aid humans' memory and use of star patterns. A. Overview This experiment involves going outside to a location where you can observe a simple pattern of stars, including at least 2, but preferably 3 or 4 stars. -
The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 a Good Way to Start – Find North
The expression "dog days" refers to the period from July 3 through Aug. 11 when our brightest night star, SIRIUS (aka the dog star), rises in conjunction* with the sun. Conjunction, in astronomy, is defined as the apparent meeting or passing of two celestial bodies. TAAS Fabulous Fifty A program for those new to astronomy Friday Evening, July 20, 2018, 8:00 pm All TAAS and other new and not so new astronomers are welcome. What is the TAAS Fabulous 50 Program? It is a set of 4 meetings spread across a calendar year in which a beginner to astronomy learns to locate 50 of the most prominent night sky objects visible to the naked eye. These include stars, constellations, asterisms, and Messier objects. Methodology 1. Meeting dates for each season in year 2018 Winter Jan 19 Spring Apr 20 Summer Jul 20 Fall Oct 19 2. Locate the brightest and easiest to observe stars and associated constellations 3. Add new prominent constellations for each season Tonight’s Schedule 8:00 pm – We meet inside for a slide presentation overview of the Summer sky. 8:40 pm – View night sky outside The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 A Good Way to Start – Find North Polaris North Star Polaris is about the 50th brightest star. It appears isolated making it easy to identify. Circumpolar Stars Polaris Horizon Line Albuquerque -- 35° N Circumpolar Stars Capella the Goat Star AS THE WORLD TURNS The Circle of Perpetual Apparition for Albuquerque Deneb 1 URSA MINOR 2 3 2 URSA MAJOR & Vega BIG DIPPER 1 3 Draco 4 Camelopardalis 6 4 Deneb 5 CASSIOPEIA 5 6 Cepheus Capella the Goat Star 2 3 1 Draco Ursa Minor Ursa Major 6 Camelopardalis 4 Cassiopeia 5 Cepheus Clock and Calendar A single map of the stars can show the places of the stars at different hours and months of the year in consequence of the earth’s two primary movements: Daily Clock The rotation of the earth on it's own axis amounts to 360 degrees in 24 hours, or 15 degrees per hour (360/24). -
NATURE [Nov. 22, R877 Addressed to Dr
66 NATURE [Nov. 22, r877 addressed to Dr. J annetaz, Secretaire-general, rue des the accuracy to which observers had attained. by the old Grands Augustins, 7, Paris, France; and all moneys sent method; but in the rude nature of the telescope itself in to Dr. Bioche, at the same address. the early times, before the introductio.n of the micrometer ; the modern accuracy has been arnved at step by step. THE MODERN TELESCOPE HE gain to astronomy from the discovery of the T telescope has been twofold. We. first, the. gain to physical astronomy from the magmficauon of obJects; and secondly, the gain to astronomy of position from the magnification, so to speak, of space, which enables minute ·portions of it to be most accurately quantified. FtG. 1.-A portion of the constellation Gemini seen with the naked eye. Looking back, nothing is more curious in the history of astronomy than the rooted objection which Revel and Let us see what the telescope does for us in the others showed to apply the telescope to the pointers and domain of that grand physical astronomy which deals pinnules of the instruments used in their day ; but doubt- with the number and appearances of the various bodies less we must look for the explanation of this not only in 1 which people space . FJG. 2.-The same region, as seeu through a large telescope. Let us, to begin with, try to see how the telescope helps the moon with a telescope of that magnifying power pretty us in the matter of observations of the sun. -
Transit of Venus M
National Aeronautics and Space Administration The Transit of Venus June 5/6, 2012 HD209458b (HST) The Transit of Venus June 5/6, 2012 Transit of Venus Mathof Venus Transit Top Row – Left image - Photo taken at the US Naval Math Puzzler 3 - The duration of the transit depends Observatory of the 1882 transit of Venus. Middle on the relative speeds between the fast-moving image - The cover of Harpers Weekly for 1882 Venus in its orbit and the slower-moving Earth in its showing children watching the transit of Venus. orbit. This speed difference is known to be 5.24 km/sec. If the June 5, 2012, transit lasts 24,000 Right image – Image from NASA's TRACE satellite seconds, during which time the planet moves an of the transit of Venus, June 8, 2004. angular distance of 0.17 degrees across the sun as Middle - Geometric sketches of the transit of Venus viewed from Earth, what distance between Earth and by James Ferguson on June 6, 1761 showing the Venus allows the distance traveled by Venus along its shift in the transit chords depending on the orbit to subtend the observed angle? observer's location on Earth. The parallax angle is related to the distance between Earth and Venus. Determining the Astronomical Unit Bottom – Left image - NOAA GOES-12 satellite x-ray image showing the Transit of Venus 2004. Middle Based on the calculations of Nicolas Copernicus and image – An observer of the 2004 transit of Venus Johannes Kepler, the distances of the known planets wearing NASA’s Sun-Earth Day solar glasses for from the sun could be given rather precisely in terms safe viewing. -
10 Tips for Moon Watchers Moon’S Brightness Are to Use High Magni- Fication Or to Add an Aperture Mask
Beginning observing You’ll find six labeled maps to help you observe the Moon at www.Astronomy.com/toc. Two other methods to reduce the 10 tips for Moon watchers Moon’s brightness are to use high magni- fication or to add an aperture mask. Mountain ranges, vast volcanic plains, and more than 1,500 named craters make the High powers restrict the field of view, Moon a target you’ll return to again and again. by Michael E. Bakich thereby reducing light throughput. An aperture mask causes your telescope to act like a much smaller instrument, but The Moon offers something for every amateur astronomer. It’s The terminator will help you at the same focal length. visible somewhere in the sky most nights, its changing face During the two favorable periods described in #3, presents features one night not seen the previous night, and it point your telescope anywhere along the line that Turn on your best vision doesn’t take an expensive setup to enjoy it. To help you get the divides the Moon’s light and dark portions. Astrono- Some years ago, my late observ- most out of viewing the Moon, I’ve developed these 10 simple 4mers call this line the terminator. Before Full Moon, the termi- ing buddy Jeff Medkeff intro- tips. Follow them, and you’ll be on your way to a lifetime of sat- nator marks where sunrise is occurring. After Full Moon, duced me to a better way of isfying lunar observing. sunset happens along the terminator. 7observing the Moon: Turn on a white Here you can catch the tops of mountains protruding just light behind you when you observe high enough to catch the Sun’s light while surrounded by lower between Quarter and Full phases. -
Three Naked Eye Galaxies? Dave Eagle
Three Naked Eye Galaxies? Dave Eagle. Eagleseye Observatory. Star hopping to M31, The Great Andromeda Galaxy. In the autumn sky in the northern hemisphere, the constellations of Perseus and Andromeda are very proudly on display, located on the meridian around midnight, and visible from most of the world. The Great Square of Pegasus is a distinct asterism of four stars. Using just your naked eye, find this square of stars. Incidentally, the top left star (all instructions are now as seen from the northern hemisphere) Sirrah, is now actually Alpha Andromedae. From this square of stars take the top edge of the square and carry the line on towards the left (east) and up. Just under half the distance of the top of the square, you should come to another reasonably bright star. Slightly left and up again, taking a slightly longer journey, you will come to another star of similar brightness. This is Mirach or Beta Andromedae. When you have found this star, turn 90 degrees to the right. You will then see two fairly bright stars leading away. Aim for the second star and gaze at this star. If your skies are reasonably dark, just above and to the right of the second star you should be able to see a faint smudge. This marks the location of M31, The Andromeda Galaxy. In five hops we have found our quarry. Figure 1 – Star hopping from Sirrah to The Andromeda Galaxy. This is the most distant object you can see with the naked eye and is almost 2.5 million light years away. -
Meeting Program
A A S MEETING PROGRAM 211TH MEETING OF THE AMERICAN ASTRONOMICAL SOCIETY WITH THE HIGH ENERGY ASTROPHYSICS DIVISION (HEAD) AND THE HISTORICAL ASTRONOMY DIVISION (HAD) 7-11 JANUARY 2008 AUSTIN, TX All scientific session will be held at the: Austin Convention Center COUNCIL .......................... 2 500 East Cesar Chavez St. Austin, TX 78701 EXHIBITS ........................... 4 FURTHER IN GRATITUDE INFORMATION ............... 6 AAS Paper Sorters SCHEDULE ....................... 7 Rachel Akeson, David Bartlett, Elizabeth Barton, SUNDAY ........................17 Joan Centrella, Jun Cui, Susana Deustua, Tapasi Ghosh, Jennifer Grier, Joe Hahn, Hugh Harris, MONDAY .......................21 Chryssa Kouveliotou, John Martin, Kevin Marvel, Kristen Menou, Brian Patten, Robert Quimby, Chris Springob, Joe Tenn, Dirk Terrell, Dave TUESDAY .......................25 Thompson, Liese van Zee, and Amy Winebarger WEDNESDAY ................77 We would like to thank the THURSDAY ................. 143 following sponsors: FRIDAY ......................... 203 Elsevier Northrop Grumman SATURDAY .................. 241 Lockheed Martin The TABASGO Foundation AUTHOR INDEX ........ 242 AAS COUNCIL J. Craig Wheeler Univ. of Texas President (6/2006-6/2008) John P. Huchra Harvard-Smithsonian, President-Elect CfA (6/2007-6/2008) Paul Vanden Bout NRAO Vice-President (6/2005-6/2008) Robert W. O’Connell Univ. of Virginia Vice-President (6/2006-6/2009) Lee W. Hartman Univ. of Michigan Vice-President (6/2007-6/2010) John Graham CIW Secretary (6/2004-6/2010) OFFICERS Hervey (Peter) STScI Treasurer Stockman (6/2005-6/2008) Timothy F. Slater Univ. of Arizona Education Officer (6/2006-6/2009) Mike A’Hearn Univ. of Maryland Pub. Board Chair (6/2005-6/2008) Kevin Marvel AAS Executive Officer (6/2006-Present) Gary J. Ferland Univ. of Kentucky (6/2007-6/2008) Suzanne Hawley Univ. -
This Is an Electronic Reprint of the Original Article. This Reprint May Differ from the Original in Pagination and Typographic Detail
This is an electronic reprint of the original article. This reprint may differ from the original in pagination and typographic detail. Author(s): Sterken, Christiaan; Aspaas, Per Pippin; Dunér, David; Kontler, László; Neul, Reinhard; Pekonen, Osmo; Posch, Thomas Title: A voyage to Vardø - A scientific account of an unscientific expedition Year: 2013 Version: Please cite the original version: Sterken, C., Aspaas, P. P., Dunér, D., Kontler, L., Neul, R., Pekonen, O., & Posch, T. (2013). A voyage to Vardø - A scientific account of an unscientific expedition. The Journal of Astronomical Data, 19(1), 203-232. http://www.vub.ac.be/STER/JAD/JAD19/jad19.htm All material supplied via JYX is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. MEETING VENUS C. Sterken, P. P. Aspaas (Eds.) The Journal of Astronomical Data 19, 1, 2013 A Voyage to Vardø. A Scientific Account of an Unscientific Expedition Christiaan Sterken1, Per Pippin Aspaas,2 David Dun´er,3,4 L´aszl´oKontler,5 Reinhard Neul,6 Osmo Pekonen,7 and Thomas Posch8 1Vrije Universiteit Brussel, Brussels, Belgium 2University of Tromsø, Norway 3History of Science and Ideas, Lund University, Sweden 4Centre for Cognitive Semiotics, Lund University, Sweden 5Central European University, Budapest, Hungary 6Robert Bosch GmbH, Stuttgart, Germany 7University of Jyv¨askyl¨a, Finland 8Institut f¨ur Astronomie, University of Vienna, Austria Abstract. -
Space Viewer Template
Space Viewer Template View Finder This goes on top of your two plates, and is glued to the paper towel tube. We recommend using cardboard for this. < Bottom Disc This gives your view finding disc structure, and is where you label the constellations. We recommend using card stock or lightweight cardboard for this. Constellation Plate > This disc is home to your constellations, and gets glued to the larger disc. We recommend using paper for this, so the holes are easier to punch. Use the punch guides on the next page to punch holes and add labels to your viewer. Orion Cancer Look for the middle star of Orions When you look at this constellation, look sword, that is an area of brighter nearby for 55 Cancri a star that has light, it’s actually a nebula! The five exoplanets orbiting it. One of those Orion Nebula is a gigantic cloud of plants (55 Cancri e) is a super hot dust and gas, where new stars are planet entirely covered in an ocean of being created. lava! Cygnus Andromeda This constellation is home to the This constellation is very close to the Kepler-186 system, including the Andromeda Galaxy (an enormous planet Kepler-186f. Seen by collection of gas, dust, and billions of NASA's Kepler Space Telescope, stars and solar systems). This spiral this is the first Earth-sized planet galaxy is so bright, you can spot it with discovered that is in"habitable the naked eye! zone" of its star. Ursa Minor Cassiopeia Ursa Minor has two stars known While gazing at Cassiopeia look for with exoplanets orbiting them - the“Pacman Nebula” (It’s official name both are gas giants, that are much is NGC 281). -
Introductory Exercise – Naked Eye Night Sky Observations Introduction
Introductory Exercise – Naked Eye Night Sky Observations Introduction One of the goals of any Astronomy class is for the students to become more familiar with objects in the sky from here on out. Knowing how orient yourself with respect to the cardinal directions and use sky maps or star wheels is a valuable valuable skill. You never know when it may come in handy and you will be able to clear up misconceptions among your relatives and friends. You will be able to calm their fears about imminent alien attacks from space or Earth's catastrophic destruction by an incoming asteroid or comet on collision course by being able to identify that light in the sky. It turns out that you can make awesome and meaningful observations of the sky just with your naked, unaided eyes. Neither telescope nor binoculars are necessary. The Crash Course Astronomy #2 "Naked Eye Observations"(https://www.youtube.com/watch?v=L- Wtlev6suc&t=23s) is a great primer on the variety of celestial objects you can observe just with eyes and how to go about it. Before you set out to make your own observations there are a few preparations you can make for the best experience: be aware of light pollution at your observing location, being able to estimate angular sizes and distances of objects in the sky, and having a sky map handy. Light Pollution Light pollution by manmade light sources is a big problem when observing the night sky. For example, here is an image by Jeremy Stanley showing part of the constellation of Orion seen with very little light pollution and with more severe light pollution. -
Newsletter 75 – October 2011
COMMISSION 46 ASTRONOMY EDUCATION AND DEVELOPMENT Education et Développement de l’Astronomie Newsletter 75 – October 2011 Commission 46 seeks to further the development and improvement of astronomical education at all levels throughout the world. ___________________________________________________________________________ Contributions to this newsletter are gratefully received at any time. PLEASE WOULD NATIONAL LIAISONS DISTRIBUTE THIS NEWSLETTER IN THEIR COUNTRIES This newsletter is available at the following website http://astronomyeducation.org (this is a more memorable URL for the IAU C46 website than www.iaucomm46.org, to which the new URL links) and also at http://physics.open.ac.uk/~bwjones/IAU46/ IAU C46 NL75 October 2011 B W Jones 1 of 23 30/10/11 10:12 BST CONTENTS Editorial The Editor is to retire Message from the President The forthcoming transit of Venus DVD for teaching basic astronomy Vinnitsa planetarium Space scoop Virtual experiments Latin-American Journal of Astronomy Education (RELEA) Netware for astronomy school education (NASE) From Hans Haubold at the UN Book reviews The sky’s dark labyrinth Atlas of astronomical discoveries News of meetings and of people Cosmic rays SpS17: light pollution Useful websites for information on astronomy education and outreach meetings Information that will be found on the IAU C46 website Organizing Committee of Commission 46 Program Group Chairs and Vice Chairs IAU C46 NL75 October 2011 B W Jones 2 of 23 30/10/11 10:12 BST EDITORIAL Thanks to everyone who has made a contribution to this edition of the Newsletter. Please note the text in this Editorial highlighted in RED. For the March 2012 issue the copy date is Friday 16 March 2012.