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Ices on Mercury: Chemistry of Volatiles in Permanently Cold Areas of Mercury’S North Polar Region
Icarus 281 (2017) 19–31 Contents lists available at ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus Ices on Mercury: Chemistry of volatiles in permanently cold areas of Mercury’s north polar region ∗ M.L. Delitsky a, , D.A. Paige b, M.A. Siegler c, E.R. Harju b,f, D. Schriver b, R.E. Johnson d, P. Travnicek e a California Specialty Engineering, Pasadena, CA b Dept of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA c Planetary Science Institute, Tucson, AZ d Dept of Engineering Physics, University of Virginia, Charlottesville, VA e Space Sciences Laboratory, University of California, Berkeley, CA f Pasadena City College, Pasadena, CA a r t i c l e i n f o a b s t r a c t Article history: Observations by the MESSENGER spacecraft during its flyby and orbital observations of Mercury in 2008– Received 3 January 2016 2015 indicated the presence of cold icy materials hiding in permanently-shadowed craters in Mercury’s Revised 29 July 2016 north polar region. These icy condensed volatiles are thought to be composed of water ice and frozen Accepted 2 August 2016 organics that can persist over long geologic timescales and evolve under the influence of the Mercury Available online 4 August 2016 space environment. Polar ices never see solar photons because at such high latitudes, sunlight cannot Keywords: reach over the crater rims. The craters maintain a permanently cold environment for the ices to persist. Mercury surface ices magnetospheres However, the magnetosphere will supply a beam of ions and electrons that can reach the frozen volatiles radiolysis and induce ice chemistry. -
Origen Y Evolución
1 2 Manuel Riveira Porta VIDA EXTRATERRESTRE Curso de Astrobiología Grupo de Astrobiología Agrupación Astronómica de Madrid Marzo de 2015 Portada: Vía Láctea Fotografía de Antonio Sánchez Agrupación Astronómica de Madrid 3 4 ÍNDICE Prólogo 9 1. Introducción 11 2. Desde el Big Bang hasta los elementos químicos 15 Origen del universo 15 Formación de las galaxias 16 Formación de las estrellas 18 Objeción de Maxwell 22 Estrellas: fábricas de los elementos químicos 23 Supernovas: formación de los elementos más pesados que el hierro 25 Nubes moleculares 25 Origen de los elementos químicos: resumen 26 3. Formación de los sistemas planetarios 29 Estructura de los discos protoplanetarios 30 Formación y evolución de los gigantes gaseosos 31 Formación de los planetas rocosos o terrestres 32 Metalicidad 33 Migraciones planetarias 34 Evidencias de las migraciones planetarias 35 Particularidades del Sistema Solar 36 Bombardeo Intenso Tardío (BIT) 37 Dataciones del Sistema Solar 38 Futuro del Sistema Solar 38 4. La Tierra: planeta “vivo” 43 ¿Cómo transcurre el tiempo? 43 Edades de la Tierra 44 La Tierra: su lugar en el Sistema Solar 46 Tierra “sólida”. Estructura dinámica 46 Temperatura interior de la Tierra 46 Capas composicionales 47 Campo magnético terrestre 49 Tectónica de placas 50 Ciclo del carbono 53 Ciclo carbonatos-silicatos 54 Efecto invernadero 54 Regulación de la temperatura del planeta 56 Historia evolutiva de la Tierra 56 Tierra sólida 57 Formaciones de hierro bandeado (BIF) 55 Súpercontinentes 59 5 Formación y fragmentación de Pangea 60 Grandes glaciaciones 61 Atmósfera 62 Historia del oxígeno 63 Atmósfera actual, capas 65 Funciones biológicas de la atmósfera 66 Hidrosfera 66 Origen del agua en la Tierra 67 5. -
Cvetoje- Vic, Anthony Cheetham, Frantz Martinache, Barnaby Norris, Peter Tuthill
Dr Benjamin Pope Lecturer in Astrophysics and DECRA Fellow Advisor: Prof. David Hogg Affiliation: School of Mathematics & Physics University of Queensland, St Lucia, QLD 4072, Australia and Centre for Astrophysics University of Southern Queensland, West Street, Toowoomba, QLD 4350, Australia Homepage: benjaminpope.github.io email: [email protected] orcid: 0000-0003-2595-9114 Education and Previous Positions 2017-2020 NASA Sagan Fellow, New York University Advisor: Prof. David Hogg 2017 Postdoctoral Research Associate, University of Sydney Advisor: Prof. Peter Tuthill 2013-2017 Doctor of Philosophy in Astrophysics, University of Oxford Thesis: “Observing Bright Stars and their Planets from the Earth and from Space” Balliol College | Supervisors: Prof. Suzanne Aigrain, Prof. Patrick Roche 2013-14 Master of Science in Astrophysics, University of Sydney Thesis: “Vision and Revision: Wavefront Sensing from the Image Domain” Supervisor: Prof. Peter Tuthill 2012 Bachelor of Science (Advanced) with Honours in Physics, University of Sydney First Class Honours, with the University Medal Thesis: “Dancing in the Dark: Kernel Phase Interferometry of Ultracool Dwarfs” Supervisors: Prof. Peter Tuthill, Dr. Frantz Martinache 2010-2011 Study Abroad at the University of California, Berkeley Research project with Prof. Charles H. Townes, Infrared Spatial Interferometer. Grants ARC Discovery Early Career Research Award (DECRA) AUD $444,075.00 NASA TESS Cycle 3 Guest Investigator USD $50,000 TESS Cycle 2 Guest Investigator USD $50,000 Balliol Balliol Interdisciplinary Institute Research Grant College GBP £3,000 Teaching 2021 Extragalactic Astrophysics & Cosmology, University of Queensland 2019 Master of Data Science Guest Lecturer, NYU Center for Data Science 2017 Bayesian Reasoning Honours Lecturer, University of Sydney 2017 Honours Project Supervisor, University of Sydney Supervised Alison Wong and Matthew Edwards, both to First Class Honours and PhD acceptance. -
Exoplanet.Eu Catalog Page 1 # Name Mass Star Name
exoplanet.eu_catalog # name mass star_name star_distance star_mass OGLE-2016-BLG-1469L b 13.6 OGLE-2016-BLG-1469L 4500.0 0.048 11 Com b 19.4 11 Com 110.6 2.7 11 Oph b 21 11 Oph 145.0 0.0162 11 UMi b 10.5 11 UMi 119.5 1.8 14 And b 5.33 14 And 76.4 2.2 14 Her b 4.64 14 Her 18.1 0.9 16 Cyg B b 1.68 16 Cyg B 21.4 1.01 18 Del b 10.3 18 Del 73.1 2.3 1RXS 1609 b 14 1RXS1609 145.0 0.73 1SWASP J1407 b 20 1SWASP J1407 133.0 0.9 24 Sex b 1.99 24 Sex 74.8 1.54 24 Sex c 0.86 24 Sex 74.8 1.54 2M 0103-55 (AB) b 13 2M 0103-55 (AB) 47.2 0.4 2M 0122-24 b 20 2M 0122-24 36.0 0.4 2M 0219-39 b 13.9 2M 0219-39 39.4 0.11 2M 0441+23 b 7.5 2M 0441+23 140.0 0.02 2M 0746+20 b 30 2M 0746+20 12.2 0.12 2M 1207-39 24 2M 1207-39 52.4 0.025 2M 1207-39 b 4 2M 1207-39 52.4 0.025 2M 1938+46 b 1.9 2M 1938+46 0.6 2M 2140+16 b 20 2M 2140+16 25.0 0.08 2M 2206-20 b 30 2M 2206-20 26.7 0.13 2M 2236+4751 b 12.5 2M 2236+4751 63.0 0.6 2M J2126-81 b 13.3 TYC 9486-927-1 24.8 0.4 2MASS J11193254 AB 3.7 2MASS J11193254 AB 2MASS J1450-7841 A 40 2MASS J1450-7841 A 75.0 0.04 2MASS J1450-7841 B 40 2MASS J1450-7841 B 75.0 0.04 2MASS J2250+2325 b 30 2MASS J2250+2325 41.5 30 Ari B b 9.88 30 Ari B 39.4 1.22 38 Vir b 4.51 38 Vir 1.18 4 Uma b 7.1 4 Uma 78.5 1.234 42 Dra b 3.88 42 Dra 97.3 0.98 47 Uma b 2.53 47 Uma 14.0 1.03 47 Uma c 0.54 47 Uma 14.0 1.03 47 Uma d 1.64 47 Uma 14.0 1.03 51 Eri b 9.1 51 Eri 29.4 1.75 51 Peg b 0.47 51 Peg 14.7 1.11 55 Cnc b 0.84 55 Cnc 12.3 0.905 55 Cnc c 0.1784 55 Cnc 12.3 0.905 55 Cnc d 3.86 55 Cnc 12.3 0.905 55 Cnc e 0.02547 55 Cnc 12.3 0.905 55 Cnc f 0.1479 55 -
Aldebaran: Group V. 2 Free Download
ALDEBARAN: GROUP V. 2 FREE DOWNLOAD Leo | 96 pages | 16 Jan 2009 | CINEBOOK LTD | 9781905460700 | English | Ashford, United Kingdom Aldebaran 2 In addition, the late John Whatmough developed illustrated web pages on this system at Extrasolar Visions. Archived from the original on The person I marry will have high honors Aldebaran: Group v. 2 then will fall in disgrace? Infor example, the Cassini spacecraft gazed at Aldebaran through the rings of Saturn to learn more about ring particle concentrations. Some of the studies have even shown almost no variation. Aldebaran also forms part of a V-shaped asterism, or group of stars, that is called the Hyades; this shape makes up the bull's face. Its origins remain unknown to this day. The four stars — Aldebaran, Aldebaran: Group v. 2Fomalhaut and Antares — were seen as the guardians of the sky. It is rumored that Aldebaran has an exoplanet named Aldebaran b. With an apparent magnitude that varies from 0. Would appreciate any Aldebaran: Group v. 2 about Sun trine Aldebaran in the natal? Bibcode : PYerO Search for:. What Aldebaran: Group v. 2 it mean if Juno is conjunct Aldebaran? Aldebaran regularly features in conspiracy theories as one of the origins of extraterrestrial aliens[55] often linked to Nazi UFOs. What would that be like? The star was noted and named in Chinese, Roman and Hindu astronomy, among other cultures. This planet causes considerable disruption in the veins and arteries surrounding this part of the body that leads to and from the heart. The star lies only Coming soon. The photosphere shows abundances of carbonoxygenand nitrogen that suggest the giant has gone through its first dredge-up stage—a normal step in the evolution of a star into a red giant during which material from deep within the star is brought up to the surface by Aldebaran: Group v. -
Exoplanet.Eu Catalog Page 1 Star Distance Star Name Star Mass
exoplanet.eu_catalog star_distance star_name star_mass Planet name mass 1.3 Proxima Centauri 0.120 Proxima Cen b 0.004 1.3 alpha Cen B 0.934 alf Cen B b 0.004 2.3 WISE 0855-0714 WISE 0855-0714 6.000 2.6 Lalande 21185 0.460 Lalande 21185 b 0.012 3.2 eps Eridani 0.830 eps Eridani b 3.090 3.4 Ross 128 0.168 Ross 128 b 0.004 3.6 GJ 15 A 0.375 GJ 15 A b 0.017 3.6 YZ Cet 0.130 YZ Cet d 0.004 3.6 YZ Cet 0.130 YZ Cet c 0.003 3.6 YZ Cet 0.130 YZ Cet b 0.002 3.6 eps Ind A 0.762 eps Ind A b 2.710 3.7 tau Cet 0.783 tau Cet e 0.012 3.7 tau Cet 0.783 tau Cet f 0.012 3.7 tau Cet 0.783 tau Cet h 0.006 3.7 tau Cet 0.783 tau Cet g 0.006 3.8 GJ 273 0.290 GJ 273 b 0.009 3.8 GJ 273 0.290 GJ 273 c 0.004 3.9 Kapteyn's 0.281 Kapteyn's c 0.022 3.9 Kapteyn's 0.281 Kapteyn's b 0.015 4.3 Wolf 1061 0.250 Wolf 1061 d 0.024 4.3 Wolf 1061 0.250 Wolf 1061 c 0.011 4.3 Wolf 1061 0.250 Wolf 1061 b 0.006 4.5 GJ 687 0.413 GJ 687 b 0.058 4.5 GJ 674 0.350 GJ 674 b 0.040 4.7 GJ 876 0.334 GJ 876 b 1.938 4.7 GJ 876 0.334 GJ 876 c 0.856 4.7 GJ 876 0.334 GJ 876 e 0.045 4.7 GJ 876 0.334 GJ 876 d 0.022 4.9 GJ 832 0.450 GJ 832 b 0.689 4.9 GJ 832 0.450 GJ 832 c 0.016 5.9 GJ 570 ABC 0.802 GJ 570 D 42.500 6.0 SIMP0136+0933 SIMP0136+0933 12.700 6.1 HD 20794 0.813 HD 20794 e 0.015 6.1 HD 20794 0.813 HD 20794 d 0.011 6.1 HD 20794 0.813 HD 20794 b 0.009 6.2 GJ 581 0.310 GJ 581 b 0.050 6.2 GJ 581 0.310 GJ 581 c 0.017 6.2 GJ 581 0.310 GJ 581 e 0.006 6.5 GJ 625 0.300 GJ 625 b 0.010 6.6 HD 219134 HD 219134 h 0.280 6.6 HD 219134 HD 219134 e 0.200 6.6 HD 219134 HD 219134 d 0.067 6.6 HD 219134 HD -
Exoplanet Biosignatures: a Review of Remotely Detectable Signs of Life
ASTROBIOLOGY Volume 18, Number 6, 2018 Mary Ann Liebert, Inc. DOI: 10.1089/ast.2017.1729 Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life Edward W. Schwieterman,1–5 Nancy Y. Kiang,3,6 Mary N. Parenteau,3,7 Chester E. Harman,3,6,8 Shiladitya DasSarma,9,10 Theresa M. Fisher,11 Giada N. Arney,3,12 Hilairy E. Hartnett,11,13 Christopher T. Reinhard,4,14 Stephanie L. Olson,1,4 Victoria S. Meadows,3,15 Charles S. Cockell,16,17 Sara I. Walker,5,11,18,19 John Lee Grenfell,20 Siddharth Hegde,21,22 Sarah Rugheimer,23 Renyu Hu,24,25 and Timothy W. Lyons1,4 Abstract In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitable exoplanets for signatures of life. Life on Earth, through its gaseous products and reflectance and scattering properties, has left its fingerprint on the spectrum of our planet. Aided by the universality of the laws of physics and chemistry, we turn to Earth’s biosphere, both in the present and through geologic time, for analog signatures that will aid in the search for life elsewhere. Considering the insights gained from modern and ancient Earth, and the broader array of hypothetical exoplanet possibilities, we have compiled a comprehensive overview of our current understanding of potential exoplanet biosignatures, including gaseous, surface, and temporal biosignatures. We additionally survey biogenic spectral features that are well known in the specialist literature but have not yet been robustly vetted in the context of exoplanet biosignatures. -
Primefocus Tri-Valley Stargazers November 2016
PRIMEFOCUS Tri-Valley Stargazers November 2016 November Meeting The History of Astronomical Imaging Dr. Lance Simms Most people know that Galileo revolutionized the field of astronomy when he pointed a telescope up at the heavens in 1610. What is not as widely known is that a similar revolution occurred when John William Draper first moved away from the human eye as the primary astronomical sensor in 1840 and used photographs instead. In this talk, I will give a brief overview of the history of astronomical imag- ing and the incredible impact it has had in the fields of astronomy, astrophysics, Meeting Info and cosmology. Along the way, I will delve into a bit of detail on how modern What: Charge Coupled Devices and CMOS imagers work. The History of Astronomical Imaging Who: Dr. Lance Simms When: November 18, 2016 Doors open at 7:00 p.m. Meeting at 7:30 p.m. Lecture at 8:00 p.m. Where: Unitarian Universalist Church in Livermore 1893 N. Vasco Road Inside News & Notes 2 Image Caption: The 48 megapixel CCD camera and instrument package on the 1.3m tele- Calendar of Events 3 scope at the Naval Observatory Flagstaff. The camera has the capability to track both stars and satellites at the same time by actively shifting the charge on the CCD while tracking. Travelogue 4 Image Credit: Ken Sperber Member Astrophotos 4-5 Lance Simms is a physicist/engineer at Lawrence Livermore National Laboratory. What’s Up 6 He received a BS in Physics from University of California: Santa Barbara in 2003 NASA’s Space Place 7 and a PhD in Applied Physics from Stanford in 2009. -
Aldebaran B's Temperate Past Uncovered in Planet Search Data Farr, Will M.; Pope, Benjamin J
University of Birmingham Aldebaran b's temperate past uncovered in planet search data Farr, Will M.; Pope, Benjamin J. S.; Davies, Guy R.; North, Thomas S. H.; White, Timothy R.; Barrett, Jim W.; Miglio, Andrea; Lund, Mikkel N.; Antoci, Victoria; Andersen, Mads Fredslund; Grundahl, Frank; Huber, Daniel DOI: 10.3847/2041-8213/aadfde License: Other (please provide link to licence statement Document Version Publisher's PDF, also known as Version of record Citation for published version (Harvard): Farr, WM, Pope, BJS, Davies, GR, North, TSH, White, TR, Barrett, JW, Miglio, A, Lund, MN, Antoci, V, Andersen, MF, Grundahl, F & Huber, D 2018, 'Aldebaran b's temperate past uncovered in planet search data', The Astrophysical Journal, vol. 865 , no. 2, L20. https://doi.org/10.3847/2041-8213/aadfde Link to publication on Research at Birmingham portal Publisher Rights Statement: Checked for eligibility: 23/10/2018 The final version of record can be found at: https://doi.org/10.3847/2041-8213/aadfde General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. •Users may freely distribute the URL that is used to identify this publication. •Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. •User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?) •Users may not further distribute the material nor use it for the purposes of commercial gain. -
Stellar Activity Mimics Planetary Signal in the Habitable Zone of Gliese 832
UNIVERSIDAD DE CONCEPCIÓN FACULTAD DE CIENCIAS FÍSICAS Y MATEMÁTICAS MAGÍSTER EN CIENCIAS CON MENCIÓN EN FÍSICA Gliese 832c: ¿Actividad Estelar o Exoplaneta? Gliese 832c: Stellar Activity or Exoplanet? Profesores: Dr. Nicola Astudillo Defru Dr. Ronald Mennickent Cid Dr. Sandro Villanova Tesis para ser presentada a la Dirección de Postgrado de la Universidad de Concepción PAULA GORRINI HUAIQUIMILLA CONCEPCION - CHILE 2020 “... we cannot accept anything as granted, beyond the first mathematical formulae. Question everything else. ” Maria Mitchell iii UNIVERSIDAD DE CONCEPCIÓN Abstract Facultad de Ciencias Físicas y Matemáticas Departmento de Astronomía MSc. Stellar activity mimics planetary signal in the habitable zone of Gliese 832 by Paula GORRINI Exoplanets are planets located outside our Solar System. The search of these objects have grown during the years due to the scientific interest and to the advances on astronomical instrumentation. There are many methods used to detect exoplanets, where one of the most efficient is the radial velocity (RV) method. But this technique accounts false positives as stellar activity can produce RV variation with an ampli- tude of the same order of the one induced by a planetary companion. In this thesis, we study Gliese 832, an M dwarf located 4.96 pc away from us. Two planets orbiting this star were found independently by the RV method: a gas-giant planet in a wide orbit, and a super Earth or mini-Neptune located within the stellar habitable zone. However, the orbital period of this latter planet is close to the stellar rotation period, casting doubts on the planetary origin of this RV signal. -
9:00 Pm SFAA ANNUAL AWARDS and MEMBERSHIP DINNER MARIPOSA HUNTER’S POINT YACHT CLUB 405 Terry A
Vol. 64, No. 1 – January2016 FRIDAY, JANUARY 22, 2015 - 5:00 pm – 9:00 pm SFAA ANNUAL AWARDS AND MEMBERSHIP DINNER MARIPOSA HUNTER’S POINT YACHT CLUB 405 Terry A. Francois Boulevard San Francisco Directions: http://www.yelp.com/map/mariposa-hunters-point-yacht-club-san-francisco Dear Members, our Annual January get-together will be Friday, January 22nd, 2016 from 5:00 to 9:00 at the Mariposa, Hunter's Point Yacht Club. There are many things to celebrate in this fun atmosphere, with tacos served by El Tonayense, salads & more, along with a full cash bar. All members are invited and SFAA will be paying for food. Non-members are welcome at a cost of $25. Telescopes will be set up on the patio, which provides beautiful views of the bay. We will be celebrating a year when we have made a successful transition to the Presidio, have continued the success of the sharing and viewing we have on Mt Tam, expanded and strengthened our City Star Parties and volunteered at many schools. Our Yosemite trip was very successful and the opportunity to tour Lick Observatory will not be soon forgotten. We will also be welcoming new members to our board and commending those whose work and commitment, our club could not function without. We look forward to enjoying the evening with all those who enjoy the night sky with the San Francisco Amateur Astronomers. There is plenty of parking, as well as easy access from the KT line and the 22 bus. Please RSVP at [email protected] Anil Chopra 2016 SAN FRANCISCO AMATEUR ASTRONOMERS GENERAL ELECTION The following members have been elected to serve as San Francisco Amateur Astronomers’ Officers and Directors for calendar year 2016. -
Physical Geology
Chapter 22 The Origin of Earth and the Solar System Learning Objectives After carefully reading this chapter, completing the exercises within it, and answering the questions at the end, you should be able to: • Describe what happened during the big bang, and explain how we know it happened • Explain how clouds of gas floating in space can turn into stars, planets, and solar systems • Describe the types of objects that are present in our solar system, and why they exist where they do • Outline the early stages in Earth’s history, including how it developed its layered structure, and where its water and atmosphere came from • Explain how the Moon formed, and how we know • Summarize the progress so far in the hunt for habitable-zone planets outside of our solar system • Explain why the planetary systems we have discovered so far raise questions about our model of how the solar system formed The story of how Earth came to be is a fascinating contradiction. On the one hand, many, many things had to go just right for Earth to turn out the way it did and develop life. On the other hand, the formation of planets similar to Earth is an entirely predictable consequence of the laws of physics, and it seems to have happened more than once. We will start Earth’s story from the beginning—the very beginning—and learn why generations of stars had to be born and then die explosive deaths before Earth could exist. We will look at what it takes for a star to form, and for objects to form around it, as well as why the nature of those objects depends on how far away from the central star they form.