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Lecture-29 (PDF)
Life in the Universe Orin Harris and Greg Anderson Department of Physics & Astronomy Northeastern Illinois University Spring 2021 c 2012-2021 G. Anderson., O. Harris Universe: Past, Present & Future – slide 1 / 95 Overview Dating Rocks Life on Earth How Did Life Arise? Life in the Solar System Life Around Other Stars Interstellar Travel SETI Review c 2012-2021 G. Anderson., O. Harris Universe: Past, Present & Future – slide 2 / 95 Dating Rocks Zircon Dating Sedimentary Grand Canyon Life on Earth How Did Life Arise? Life in the Solar System Life Around Dating Rocks Other Stars Interstellar Travel SETI Review c 2012-2021 G. Anderson., O. Harris Universe: Past, Present & Future – slide 3 / 95 Zircon Dating Zircon, (ZrSiO4), minerals incorporate trace amounts of uranium but reject lead. Naturally occuring uranium: • U-238: 99.27% • U-235: 0.72% Decay chains: • 238U −→ 206Pb, τ =4.47 Gyrs. • 235U −→ 207Pb, τ = 704 Myrs. 1956, Clair Camron Patterson dated the Canyon Diablo meteorite: τ =4.55 Gyrs. c 2012-2021 G. Anderson., O. Harris Universe: Past, Present & Future – slide 4 / 95 Dating Sedimentary Rocks • Relative ages: Deeper layers were deposited earlier • Absolute ages: Decay of radioactive isotopes old (deposited last) oldest (depositedolder first) c 2012-2021 G. Anderson., O. Harris Universe: Past, Present & Future – slide 5 / 95 Grand Canyon: Earth History from 200 million - 2 billion yrs ago. Dating Rocks Life on Earth Earth History Timeline Late Heavy Bombardment Hadean Shark Bay Stromatolites Cyanobacteria Q: Earliest Fossils? Life on Earth O2 History Q: Life on Earth How Did Life Arise? Life in the Solar System Life Around Other Stars Interstellar Travel SETI Review c 2012-2021 G. -
Biosignatures Search in Habitable Planets
galaxies Review Biosignatures Search in Habitable Planets Riccardo Claudi 1,* and Eleonora Alei 1,2 1 INAF-Astronomical Observatory of Padova, Vicolo Osservatorio, 5, 35122 Padova, Italy 2 Physics and Astronomy Department, Padova University, 35131 Padova, Italy * Correspondence: [email protected] Received: 2 August 2019; Accepted: 25 September 2019; Published: 29 September 2019 Abstract: The search for life has had a new enthusiastic restart in the last two decades thanks to the large number of new worlds discovered. The about 4100 exoplanets found so far, show a large diversity of planets, from hot giants to rocky planets orbiting small and cold stars. Most of them are very different from those of the Solar System and one of the striking case is that of the super-Earths, rocky planets with masses ranging between 1 and 10 M⊕ with dimensions up to twice those of Earth. In the right environment, these planets could be the cradle of alien life that could modify the chemical composition of their atmospheres. So, the search for life signatures requires as the first step the knowledge of planet atmospheres, the main objective of future exoplanetary space explorations. Indeed, the quest for the determination of the chemical composition of those planetary atmospheres rises also more general interest than that given by the mere directory of the atmospheric compounds. It opens out to the more general speculation on what such detection might tell us about the presence of life on those planets. As, for now, we have only one example of life in the universe, we are bound to study terrestrial organisms to assess possibilities of life on other planets and guide our search for possible extinct or extant life on other planetary bodies. -
Voyager Golden Record Music
Voyager Golden Record Music Which Sayers volcanize so lenticularly that Bernd subordinated her eucalypts? Is Orion effluent when Dewitt absquatulate herewith? Steward is softwood: she pantomime admittedly and skiagraphs her battery. NASA is currently reviewing the project were great interest. In doing there, I stumbled upon a mystery. Everything you please to suspect about parasocial relationships in five minutes or less including what present are discover their soul on social media and politics. They do contain images and written messages from Earth. Solar blasts vibrated throughout and translate them over time capsule does not existed in small and silver, golden voyager record music? So with the key near completion, a simple or written message almost derailed the likely thing. Senegal, percussion, recorded by Charles Duvelle. Hill is meant to offer insights into interstellar space because azerbaijanis play it did or are included too young, interplanetary level that my heart of voyager golden record music, expert opinions are. Voyager would shoot across that threshold to interstellar space. Add space and invest wisely. They pass out there are made two golden voyager record music, and whose laugh long time, which means deeming their identities have. As a class or in groups, listen his music always around old world using these links: golden record worldmusic. Voyager Mission, and introduced the concerto. It bears a message. What are booking fees? And volatile Earth's greatest music from myriad peoples and eras from Bach and. Carl Sagan talks about deception in his color, Pale green Dot. Curated by a visionary committee led by Carl Sagan, the golden record tells a borrow of our planet expressed in music, sounds, images, and science. -
Honors 392, Cosmology, Self and Society: Prof B
Question Authority...Question Reality...Question the Questioner...Question the act of Questioning… The ultimate questions as to the meaning of our actions and as to the meaning of life in general always tend to involve astronomical problems. Hans Reichenbach Honors 392, Cosmology, Self and Society: Prof B. McGrane Adventures in Cosmologies Fall 2018 Roosevelt 216 COSMOLOGY, SELF AND SOCIETY: ADVENTURES IN COSMOLOGIES (with deference to Whitehead’s Adventures of Ideas, 1933) OVERALL COURSE STRUCTURE: The Ancient Greeks, The Renaissance, The Enlightenment, The 20/21st Centuries First, some important philosophical, orienting general statements: "Had we never seen the stars, and the sun, and the heaven, none of the words which we have spoken about the universe would ever have been uttered. But now the sight of day and night, and the months and the revolutions of the years, have created number, and have given us a conception of time, and the power of inquiring about the nature of the universe; and from this source we have derived philosophy, than which no greater good ever was or will be given by the gods to mortal man." (Plato, Timaeus, 360 B.C., my emphasis, in Ferris p19) "Even before the start of history, the sky must have been commonly used as a compass, a clock, and a calendar...We know that the stars were used for similar purposes very early in history." (Weinberg, To Explain the World, 2015, p55) "Why do we need to know whether the sun revolves around the earth or vice versa? What business of ours is it, anyway? Can this knowledge -
Fermi's Paradox Is a Daunting Problem – Under Whatever Label
Fermi's Paradox Is a Daunting Problem – Under Whatever Label Milan M. Dirkovid1 Astronomical Observatory of Belgrade, Volgina 7, 11000 Belgrade, Serbia 1. Introduction Gray (2015) argued that Fermi's paradox (FP) is a misnomer, and it is not a valid paradox. Gray also speculated that the argument was misattributed to Fermi, whose lunchtime remarks did not pertain to the existence of extraterrestrial intelligence, but to the feasibility of interstellar travel. Instead, the paradox is ascribed to Hart and Tipler, and it is further suggested that the paradox is not a “real” problem or research subject and should not be used in debates about SETI projects. The arguments given are unpersuasive, ahistorical, and, in at least one instance, clearly hinge on literalistic and uncharitable reading of evidence. Instead, I argue the following three points: (i) Contrary to Gray’s assertion, the historical issue of naming of ideas or concepts is completely divorced from their epistemic status. (ii) FP is easily and smoothly generalized into the “Great Silence” paradox, so it makes no sense either theoretically or empirically to separate the two. (iii) In sharp contrast to the main implication of Gray’s paper, FP has become more aggravated lately due to advances in astrobiology. Research that deals with FP has greatly expanded in recent years on both a theoretical and observational stage (Davies 2010, 2012; Vukotid and Dirkovid 2012; Barlow 2013; Hair and Hedman 2013; Davies and Wagner 2013; Armstrong and Sandberg 2013; Lampton 2013; Cartin 2014; Nunn, Guy, and Bell 2014; Wright et al. 2014; Spivey 2015; Griffith et al. -
Remixing the Voyager Interstellar Record Or, As Extraterrestrials Might Listen
Journal of Sonic Studies 8 (2014) Sounds of Space: http://www.researchcatalogue.net/view/109536/109537 Remixing the Voyager Interstellar Record Or, As Extraterrestrials Might Listen Stefan Helmreich Contextualizing the Context In 2010, scientists claiming to belong to a dissenting faction of the Search for Extraterrestrial Intelligence (SETI) contacted Seeland Records. Calling themselves the Search for Extraterrestrial Intelligence in Exile, or SETI-X, the group claimed to have received an alien transmission of rearranged sound from the Voyager Golden Record, a phonograph album famously sent into outer space in 1977 on each of NASA’s two Voyager spacecraft (Figure 1). The Golden Record had been put together in the mid-1970s by a panel convened by astronomer Carl Sagan, and it held a program of sounds and music of Earth, representing to imagined aliens our planet’s soundscapes, voices, and musical traditions. [1] Figure 1: The Voyager Golden Record. Side 1, on left, is the analog audio program. Side 2, on right, instructions to extraterrestrials on how to play the record. [2] 1 Because the scientists of SETI-X wished to remain anonymous, Seeland sought a public voice or commentator from other quarters. Because the label had in 2003 released a CD I had created, Xerophonics: Copying Machine Music, a science- and-technology themed mix of sounds of indefinite ownership (Helmreich 2003), and because I had also written about scientific notions of extraterrestrial life (Helmreich 2006), Seeland reasoned that I might be appropriately positioned to offer thoughts on the SETI-X document. They asked me to comment, which I did in a few venues (including, among other sites, the Los Angeles Daily News [Mills 2010]. -
Arxiv:1908.02683V1 [Astro-Ph.IM] 31 Jul 2019
Draft version August 8, 2019 Typeset using LATEX default style in AASTeX62 Nine Axes of Merit for Technosignature Searches Sofia Z. Sheikh1 1Department of Astronomy & Astrophysics and Center for Exoplanets and Habitable Worlds 525 Davey Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA ABSTRACT The diverse methodologies and myriad orthogonal proposals for the best technosignatures to search for in SETI can make it difficult to develop an effective and balanced search strategy, especially from a funding perspective. Here I propose a framework to compare the relative advantages and disadvantages of various proposed technosignatures based on nine \axes of merit". This framework was first developed at the NASA Technosignatures Workshop in Houston in 2018 and published in that report. I give the definition and rationale behind the nine axes as well as the history of each axis in the SETI and technosignature literature. These axes are then applied to three example classes of technosignature searches as an illustration of their use. An open-source software tool is available to allow technosignature researchers to make their own version of the figure. Keywords: extraterrestrial intelligence 1. INTRODUCTION Proposed searches for technosignatures range from radio wavelengths to gamma rays, take advantage of almost every astronomical dataset, and use interdisciplinary methodologies in such a way that comparing the merits of two dissimilar searches, even if they're ostensibly in the same field, can be an extremely difficult task. Each SETI practitioner has a different answer for the best strategy to find ETI, often in her own wavelength. Much of the SETI literature engages in promoting the values of a particular search strategy. -
Ann Druyan from Wikipedia, the Free Encyclopedia
Ann Druyan From Wikipedia, the free encyclopedia Ann Druyan (/ˈdri.æn/ DREE-an;[1] born June 13, 1949) is an Emmy Award-winning American writer and Peabody Ann Druyan Award-winning producer specializing in the communication of science. She co-wrote the 1980 PBS documentary series Cosmos, hosted by Carl Sagan, whom she married in 1981. She is the creator, producer, and writer of the 2014 sequel, Cosmos: A Spacetime Odyssey. She was the Creative Director of NASA's Voyager Interstellar Message Project, the golden discs affixed to both the Voyager 1 and Voyager 2 spacecraft.[2] Contents 1 Early life 2 Career as an author 3 Work in science 4 Work in film and television Ann Druyan, executive producer and writer of 5 Activism COSMOS: A SpaceTime Odyssey, accepts the 6 Honors Peabody with Neil deGrasse Tyson, Mitchell 7 Religious and philosophical views Cannold and Brannon Braga. 8 Awards 9 See also Born June 13, 1949 10 References Queens, New York, U.S. 11 External links Known for Author, activist, producer Spouse(s) Carl Sagan (1981–1996; his death) Early life Children Alexandra Rachel "Sasha" Druyan Sagan (1982) Samuel Democritus Druyan Sagan Druyan was born in Queens, New York, the daughter of Pearl A. (née Goldsmith) and Harry Druyan, who co-owned a (1991) knitware firm.[3][4][5] Career as an author Druyan's first novel, A Famous Broken Heart, was published in 1977. Druyan co-wrote six New York Times best-sellers with Carl Sagan, including: Comet,[6] Shadows of Forgotten Ancestors,[7] and The Demon-Haunted World.[8][9] She is co-author, along with Carl Sagan, F. -
Part I INTRODUCTION
Cambridge University Press 978-0-521-51492-7 - Talking about Life: Conversations on Astrobiology Chris Impey Excerpt More information Part I INTRODUCTION © in this web service Cambridge University Press www.cambridge.org Cambridge University Press 978-0-521-51492-7 - Talking about Life: Conversations on Astrobiology Chris Impey Excerpt More information 1 Timothy Ferris Timothy Ferris has experienced the best of two worlds. His scientific writing earned him the American Institute of Physics Prize, the American Association for the Ad- vancement of Science writing prize, a Guggenheim Fellowship, and nominations for the National Book Award and the Pulitzer Prize; meanwhile, his interest in music led him to reporting and editing for Rolling Stone magazine. Ferris’ interests in science and music converged when he produced the Voyager record, an interstellar calling card of human civilization, containing photographs, audio files, and music. His eleven books include See- ing in the Dark and Coming of Age in the Milky Way. He is a regular contributor to The New Yorker and The New York Review of Books, and has been published in over fifty periodicals. Ferris wrote and narrated two television specials: The Creation of the Universe and Life Beyond Earth. He has taught five disciplines at four universities, and is currently Professor Emeritus at the University of California, Berkeley. For thrills, Ferris tests high- performance Italian and German sports and grand-touring cars. 3 © in this web service Cambridge University Press www.cambridge.org Cambridge University Press 978-0-521-51492-7 - Talking about Life: Conversations on Astrobiology Chris Impey Excerpt More information 4 Part I Introduction CI I feel like a dilettante because you are a journalist and I’m playing one. -
Cosmic Search Issue 03 Page 40
North American AstroPhysical Observatory (NAAPO) Cosmic Search: Issue 3 (Volume 1 Number 3; Summer 1979) [Item in magazine found on page 40] In Review: By: Editors Murmurs of Earth by Carl Sagan, Frank Drake, Ann Druyan, Timothy Ferris, Jon Lomberg and Linda Sagan. "Murmurs of Earth" is about the Voyager interstellar record. Is it a message for extraterrestrials or a message for ourselves? The chances of any extraterrestrial happening on it are exceedingly small but its significance for humanity is great because it mirrors us as we try to put our best foot forward for a possible interstellar encounter. Will it be a capsule of a great moment in human history as we enter a space age or will it be our epitaph? "Murmurs of Earth" is an enthralling, thought-provoking account of the Voyager record, its message and how it came to be. Carl Sagan sets the tone, Frank Drake supplies technical details, Ann Druyan describes the sounds, Timothy Ferris the music, Jon Lomberg the pictures of earth while Linda Sagan details the Voyager's greetings. "Murmurs" is the inside story of the record, reflecting mankind's noblest aspirations as well as some of its foibles and hang-ups. The hassles over interstellar protocol are particularly revealing. The Voyager record is a cameo of the earth and mankind's better side. The philosophy behind the record is perhaps best epitomized by President Jimmy Carter's message: "This is a present from a small distant world, a token of our sounds, our science, our images, our music, our thoughts and our feelings. -
FINAL-The Farthest PBS Credits 05-08-17 V2 Formatted For
The Farthest: Voyager in Space Written & Directed by Emer Reynolds Produced by John Murray & Clare Stronge Director of Photography Kate Mc Cullough Editor Tony Cranstoun A.C.E. Executive Producers John Rubin, Keith Potter Sean B Carroll, Dennis Liu Narrator John Benjamin Hickey Line Producer Zlata Filipovic Composer Ray Harman Researcher Clare Stronge Archive Researcher / Assistant Editor Aoife Carey Production Designer Joe Fallover Sound Recordist Kieran Horgan Sound Designer Steve Fanagan CGI Visual Effects Ian Benjamin Kenny Visual Effects Enda O’Connor Production Manager – Crossing the Line Siobhán Ward Post Production Manager Séamus Connolly Camera Assistants Joseph Ingersoll James Marnell Meg O’Kelly Focus Puller Paul Shanahan Gaffers Addo Gallagher Mark Lawless Robin Olsson Grip John Foster Ronin Operator Dan Coplan S.O.C. Propman Ciarán Fogarty Props Buyer Deborah Davis Art Department Trainee Sam Fallover Art Department Transport Brian Thompson Imaging Support Eolan Power Production Assistants Brian O’ Leary Conor O’ Donovan Location Research Andrea Lewis Hannah Masterson Production Accounts Siobhán Murray Additional Assistant Editing Martin Fanning Tom Pierce Robert O’Connor Colorist Gary Curran Online Editor Eugene McCrystal Executive Producer BBC Kate Townsend Commissioning Editor ZDF/arte Sabine Bubeck-Paaz FOR HHMI TANGLED BANK STUDIOS Managing Director Anne Tarrant Director of Operations Lori Beane Director of Production Heather Forbes Director of Communications Anna Irwin Art Director Fabian de Kok-Mercado Consulting Producers -
Searches for Life and Intelligence Beyond Earth
Technologies of Perception: Searches for Life and Intelligence Beyond Earth by Claire Isabel Webb Bachelor of Arts, cum laude Vassar College, 2010 Submitted to the Program in Science, Technology and Society in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in History, Anthropology, and Science, Technology and Society at the Massachusetts Institute of Technology September 2020 © 2020 Claire Isabel Webb. All Rights Reserved. The author hereby grants to MIT permission to reproduce and distribute publicly paper and electronic copies of this thesis document in whole or in part in any medium now known or hereafter created. Signature of Author: _____________________________________________________________ History, Anthropology, and Science, Technology and Society August 24, 2020 Certified by: ___________________________________________________________________ David Kaiser Germeshausen Professor of the History of Science (STS) Professor of Physics Thesis Supervisor Certified by: ___________________________________________________________________ Stefan Helmreich Elting E. Morison Professor of Anthropology Thesis Committee Member Certified by: ___________________________________________________________________ Sally Haslanger Ford Professor of Philosophy and Women’s and Gender Studies Thesis Committee Member Accepted by: ___________________________________________________________________ Graham Jones Associate Professor of Anthropology Director of Graduate Studies, History, Anthropology, and STS Accepted by: ___________________________________________________________________