1. Other Worlds Not So Strange, Top Planet Hunter Says advertisement. other worlds Not So Strange, Top Planet Hunter Says By RobertRoy Britt Senior Science Writer posted 0700 am ET 14 May 2002. http://www.space.com/scienceastronomy/astronomy/exoplanet_status_020514-1.html

SEARCH: Spacewatch: Backyard Astronomy advertisement Other Worlds Not So Strange, Top Planet Hunter Says By Robert Roy Britt Senior Science Writer posted: 07:00 am ET 14 May 2002 BALTIMORE - The popular conception of planets around other stars involves strange worlds, all much larger than Jupiter on crazy paths in solar systems that look nothing like our own but within the planet-hunting community, that view has changed. Recent discoveries, along with the cleaning up of a few long-held misconceptions, reveal a handful of solar systems that are not so strange after all. Things out there are beginning to look a lot more like things back home. Geoffrey Marcy, a University of California at Berkeley researcher widely recognized as this world's top planet hunter, set the record straight in an interview with SPACE.com last week. SCIENCE TUESDAY Visit SPACE.com to explore a new science feature each Tuesday. >>Go to Science Tuesday archive page Images Around the star Upsilon Andromedae, astronomers found the first multiple-planet system outside our own. The planets are all much closer in than Jupiter and larger than the inner planets of our solar system. Reality Check: Known extrasolar planets less than 15 times the mass of Jupiter. The category with the most planets involves those no more massive than Jupiter.

2. The Observatory: A Guide To Astronomy Resources On The Exploratorium Website. California handson science museum presents fun astronomy information. Learn about solar astronomy, or build a solar system. astronomy Resources. Build a Solar System-. Find out what space is really like with this scale model. Your Weight on other worlds- http://www.exploratorium.edu/observatory

The Exploratorium's Guide to Astronomy Resources. Build a Solar System Find out what space is really like with this scale model. Your Weight on Other Worlds - A cool exhibit for the weight conscious. Your Age on Other Worlds - A cool exhibit for the chronologically challenged. Project Serendip Search For Life in the Cosmos with SETI. The eleven year solar cycle reached its maximum in 2000. See images of the sun, follow solar max news, and keep up with NASA missions. On June 21, 2001 we will experience the first total solar eclipse of the new millennium! Join us as we present a live Webcast from Southern Africa! Stories on the science, human history, and natural wonder of solar eclipses. See the tiny disk of Mercury slowly travel across the face of the sun in this rare event. Dark spots, some as large as 50,000 miles in diameter, move across the surface of the sun, contracting and expanding as they go. Far north in the night sky, a faint glow appears on the horizon. Green and red flames of light stretch across the sky.

3. Your Weight On Other Worlds Learn more about worlds outside our galaxy with this catalog of extrasolar planets. Features include images and astronomy links. http://www.exploratorium.edu/ronh/weight

Ever wonder what you might weigh on Mars or The Moon? Here's your chance to find out. This Page requires a JavaScript capable browser. Fill in your weight below in the space indicated. You can enter your weight in any unit you wish. Click on the "Calculate" button. Notice that the weights on other worlds will automatically fill in. Notice that your weight is different on the different worlds. You can click on the images of the planets to get more information about them from Bill Arnett's incredible Nine Planets web site. The Planets MERCURY Your weight is VENUS Your weight is THE MOON Your weight is MARS Your weight is JUPITER Your weight is SATURN Your weight is URANUS Your weight is NEPTUNE Your weight is PLUTO Your weight is The Moons of Jupiter IO Your weight is EUROPA Your weight is GANYMEDE Your weight is CALLISTO Your weight is A Few Different Types of Stars (better land at night to avoid burning your feet!) THE SUN Your weight is A WHITE DWARF Your weight is A NEUTRON STAR Your weight is Mass and Weight Before we get into the subject of gravity and how it acts, it's important to understand the difference between weight and mass We often use the terms "mass" and "weight" interchangeably in our daily speech, but to an astronomer or a physicist they are completely different things. The mass of a body is a measure of how much matter it contains. An object with mass has a quality called

4. New Era Dawns In Search For Other Worlds A new era has dawned in the search for other worlds. solar systems like ours are possible– other places that While dust thwarts optical astronomy, it can be http://www.space.com/scienceastronomy/astronomy/dusty_worlds_020123-1.html

SEARCH: Spacewatch: Backyard Astronomy advertisement New Era Dawns in Search for Other Worlds By Robert Roy Britt Senior Science Writer posted: 07:00 am ET 23 January 2002 WASHINGTON D.C. - At a meeting of the American Astronomical Society earlier this month, the Hilton and Towers hotel was loaded with more dust than a second-hand bookstore owner sees in a lifetime. It permeated the aisles of a conference hall where hundreds of posters presented fresh views of the universe, worked its way into rooms where researchers discussed their findings. Far from obscuring the gathering, astronomers announced they had peered through the dust to get the best view ever of the center of our galaxy. Mapped it to reveal the collision of stellar winds . More significant, they used mere dust grains to gain tantalizing new insights into the earliest stages of planet formation. Images Rendering shows what the disk of gas and dust around a typical young star might look like. Some rocky "protoplanets" have already formed. An artist's view of a possible planet being born, seen as a yellow clump of dust and gas at two location in its orbit around the star Vega.

5. The Exploratorium's "What's New In The World" October'97 Issue No. 21 astronomy , 2nd Aniversary Issue! Your Weight on other worldsYour Weight on other worlds A cool exhibit for the weight conscious. http://www.exploratorium.edu/learning_studio/news/october97.html

Issue No. 21 "Astronomy" 2nd Aniversary Issue! October 29, 1997 Are we alone? A portion of the Hubble Deep Field showing distant galaxies. Story by Ron Hipschman "Contact," "Star Trek," "Babylon 5," "Star Wars," "Alien," and the rest of the lot have one thing in common. They all deal with alien civilizations and their relationships to humans. Some of these futuristic fictions portray alien life as friendly, some as hostile. Most of the aliens are curiously "humanoid." Many of us dream of one day meeting up with a (friendly) alien race. Much could be learned and discovered about each other. What are we doing right now to make this happen? Two cool interactive exhibits! Build a Solar System - Find out what space is really like with this scale model. Your Weight on Other Worlds -A cool exhibit for the weight conscious. Interview with Dan Werthimer of SERENDIP "SERENDIP: Searching For Life" Search only "What's New In the World" Search the entire Exploratorium Web Server Number of results returned: Last Issue: "How Far Can You Hit One? The Science Behind a Home Run" and "Try this: Finding the Sweet Spot"

6. StarWorlds - Astronomy And Related Organizations All Products Books -Used Books -Collectable Books All Subjects -Art, Architecture Photography -Audio Cassettes -Audio CDs -Biography -Business, Finance Law -Children's Books -Comics Graphic Novels -Computers Internet -Crime, Thrillers http://cdsweb.u-strasbg.fr/~heck/sfworlds.htm

The Star*s Family The StarPages StarWorlds Welcome to the largest searchable directory, continually updated, of organizations, institutions, associations, companies, and so on, involved in astronomy and related space sciences, together with other entries of interest (currently about 6,500 entries with all practical details available and more than 6,500 hot links ). See also the outstanding features . For homepages of professional astronomers, please go to StarHeads . Abbreviations, acronyms, and so on, are in StarBits . You should also read the and the statements. The database StarWorlds is associated to the directory (on paper) of organizations StarGuides Note that StarGuides is now published by Kluwer Academic Publishers To retrieve information from the database, select your option Words Embedded string Case insensitive Case sensitive and type a character string in the following area (low-case characters recommended) and press the Return key or the Search button to submit the query: Enter any string (name or part of the name of an organization, city, location, title of periodical, ISS Number, part of an e-mail address or of a URL, and so on) with the options `Embedded string' and `Case insensitive' and the system will retrieve all organizations with that string appearing in the text of their entry.

7. Other Worlds, Distant Suns Want to ensure you are current on the seemingly daily discoveries in astronomy andthe space sciences? Then sign up for the other worlds, Distant Suns mailing http://www.astronautica.com/owds.html

people have visited this site since 5 August 1996. All information on this website is Garber Astronautics Extrasolar Planet Catalog Encyclopedia Extrasolar UPDATED Table of Extrasolar Planets by Alex Willman Comparative Image of Extrasolar Systems Extrasolar Detection Methods Observing Guide Northern Celestial Hemisphere UPDATED Southern Celestial Hemisphere UPDATED 16 Cygni 47 Ursae Majoris 51 Pegasi 55 Cancri ... HD 192263 NEW HD 177830 NEW HD 134987 NEW HD 222582 NEW HD 10697 NEW HD 37124 NEW Other Extrasolar Planet Resources Extrasolar Planets Encyclopedia , by Jean Schneider, Observatoire de Paris Searching for Extrasolar Planets , by Dr. Geoff Marcy and Dr. Paul Butler, San Francisco State University ExtrasolarVisions by John Whatmough - speculation and science of these new worlds Data Gliese Near Star Catalog v3.0 NOTE: VRMLs and images will appear in a new browser window VRMLs What is VRML? Click here for VRML viewing tips Extrasolar Systems UPDATED Extrasolar Systems Map VRML The spatial relation and distances to all the known extrasolar systems Comparative Representation of Extrasolar Systems VRML A 3D comparison of the extrasolar systems to the Sun and Jupiter click here for a 10K preview image Stellar The 65 Nearest Star Systems VRML All the known stars within a 17 light-year radius of the Sun click here for a 10K preview image The Brightest Stars within 100 Light-years VRML The 65 nearest stars in addition to the brightest stars out to 100light-years click here for a 10K preview image Solar System Venus: Atmosphere and Surface VRML click here for a 10K preview image Earth - Moon System VRML click here for a 10K preview image ... Jovian System VRML Jupiter and its four largest moons: Io, Europa, Ganymede and Callisto

8. Sri Lanka: Gateway To Other Worlds? Sri Lanka Gateway to other worlds? Scientists reexamine legends of Serendip Patrick Harrigan, M.A., studied astronomy at the University of Michigan before entering the field of http://www.kataragama.org/research/gateways.htm

Sri Lanka: Gateway to Other Worlds? Scientists re-examine legends of Serendip O ngoing space research shares much in common with recent investigations studying the basis for Lanka’s ancient reputation as a gateway between worlds. The implications, researchers say, could be enormous. This article was written to commemorate Sri Lanka’s contribution to worldwide functions marking 1992 as the International Space Year. Patrick Harrigan , M.A., studied astronomy at the University of Michigan before entering the field of South Asia studies. He now serves as acting editor of the Kataragama Research Publications Project. Ptolemy's map of Taprobane. "Not only is the universe more complex than we ever thought, it is far more mysterious and magical than we ever believed." - American physicist Dr. Fred Alan Wolf I nstantaneous transport between worlds , once the stuff of science fiction and long a favorite theme of lore and legend would ever dare to imagine, according to a growing consensus of researchers in the rapidly-emerging field of parallel universe theory. Now scientific interest appears to be focusing upon Sri Lanka’s living tradition of cosmography or sacred geography the understanding of which could lead to discoveries that are literally out of this world. Theoretical physicists, backed by recent findings in the field of radio astronomy, are suggesting that the visible universe as we see it may in fact consist of multiple overlapping universes that are dependently inter-related in some yet unknown way. They point, for instance, to recent calculations indicating that nine-tenths of the universe’s postulated mass may consist of 'dark matter' that is yet undetected and unaccounted for a disturbing fact to astrophysicists that is neatly explainable in terms of parallel universe theory.

9. PRAXIS Publishing Astronomy & Space Sciences: Life On Other Worlds worlds Bookcover/link to New Scientist review Life on other worlds and How from thefrontiers of such diverse research topics as astronomy, biology, genetics http://www.praxis-publishing.co.uk/space/aliens.htm

Life on Other Worlds and How to Find It Stuart Clark Research into the possibility of life beyond Earth is no longer a fringe discipline. For example, a growing number of scientists now believe that microbial life will be found on Mars. In this fascinating new book, astrophysicist Stuart Clark considers the weight of modern scientific evidence and finds every reason to believe that life-forms should be as much a part of the cosmos as stars themselves. Drawing together strands from the frontiers of such diverse research topics as astronomy, biology, genetics and language theory, the author presents a cosmic tapestry for the general audience, showing life's inextricable bonds with the cosmos. With easy-to-understand examples, Stuart takes the reader on an intriguing journey into the deepest realms of the Universe, into the microscopic world of the living cell and back to the time of the dinosaurs. Life on Earth, it seems, is no chance accident nor is it anything miraculous. Instead, scientists are beginning to realise that each step is a perfectly consistent, perhaps even expected, step along the scientific ladder. So if life developed on Earth, then why not elsewhere? Ultimately, by explaining how life is so intrinsically linked with the laws of nature, this book brings the Universe a little closer to us all, and forces us to believe in the existence of extraterrestrials.

10. PRAXIS Publishing Astronomy & Space Sciences: Life On Other Worlds Life On other worlds is visually spare, but it is rich in language The distinctionis important, amateur astronomers take their astronomy more seriously than http://www.praxis-publishing.co.uk/space/nsreview.htm

Life On Other Worlds and How to Find It by Stuart Clark, Praxis, £16.95, ISBN 185233097X PEOPLE are fascinated by the prospect of life in space. My proof? I count an even dozen volumes on bioastronomy on my bookshelf, all published within the past year. But among these, Stuart Clark's Life On Other Worlds and How To Find It is unique its in approach. We must walk before we run, says Clark. Don't even ask the age-old question "Are we alone?" until you 've brushed up on the basics. These basics are the principles and assumptions that underlie any search for life beyond our sphere. Here, Clark invokes the writings of Carl Sagan, Paul Davies, David Blair, Christian de Duve and many other respected experts. A swift tutorial on cosmic evolution takes us from the big bang to the formation of planets that might, just possibly, support life. This sets the stage for a lucid discussion of the emergence of life and exactly what constitutes a hospitable environment. The backdrop is a picture of Earth-like planets as commonplace among the myriad worlds in our Universe. But just because life could exist elsewhere is no guarantee that it does. To find out, we have to do the experiment. We have to collect the data. The search for life within our own Solar System has its roots in the 18th-century furore over supposed canals on Mars. Centuries later, the controversy continues, but now it is over the 1996 claim that a Martian meteorite contains microbial fossils. Exobiologists have not rejected the prospect of finding primitive life close to home. Several space missions are due to leave the drawing board and test for the presence of life.

11. Other Worlds Where H2S Serves In Place Of H20? MadSci Network astronomy Subject other worlds where H2S serves inplace of H20? Date Sun Apr 11 122628 1999 Posted by Jackson http://www.madsci.org/posts/archives/apr99/924092039.As.q.html

MadSci Network : Astronomy Subject: Other worlds where H2S serves in place of H20? Date: Sun Apr 11 12:26:28 1999 Posted by Jackson McConnell Grade level: nonaligned School: Another Suffering Computer Programmer City: Windy City State/Province: Il Country: USA Area of science: Astronomy ID: 923851588.As Message: I saw a show on NOVA a few nights ago about bacteria that use hydrogen sulfide in place of water for (what I perceived as) their endpoint of electron transport. This idea fascinated me.. Is it possible that on distant worlds there could be conditions favoring H2S oceans, icebergs, rainstorms and dark sulfurous clouds? I seem to recall that one of the Jovian moons had a lot of sulfur on it. How different would such an environment have to be from the Earth to allow H2S to function in the role of water? Thanks for providing this service! - J. Re: Other worlds where H2S serves in place of H20? Current Queue Current Queue for Astronomy Astronomy archives Try the links in the MadSci Library for more information on Astronomy MadSci Network

12. Re: Other Worlds Where H2S Serves In Place Of H20? MadSci Network astronomy Re other worlds where H2S serves in placeof H20? Date Tue Apr 13 190036 1999 Posted By Nick Hoffman http://www.madsci.org/posts/archives/apr99/924092039.As.r.html

MadSci Network : Astronomy Re: Other worlds where H2S serves in place of H20? Date: Tue Apr 13 19:00:36 1999 Posted By: Nick Hoffman, Oil and Gas Exploration Geophysics - Melbourne, Australia Area of science: Astronomy ID: 923851588.As Message: Hi Jackson, I didn't see that programme - we don't get NOVA here in Australia :-) I can guess what it said though, because I've been researching this sort of thing in my spare time recently. One thing to get clear is that either you or NOVA have something a bit wrong about how the Bacteria uses H2S. If you look at these sorts of bacteria (and algae like Cyanidium caldarium that have equivalent chemistry) you find that their bodies are just like "normal" organisms, with body fluids based on water. They aren't full of liquid H2S. What they do is USE H2S as an energy source, instead of photosynthesising or eating "normal" energy foods like sugars and fats, and oxidising them. What they do is take in H2S and combine it with other chemicals to make sulphates, plus energy in the form of hydrogen ions. See WebElements for more info on the Elements: http://www.webelements.com/

13. Firefly Books - Other Worlds rface of a brown dwarf. Travel with awardwinning astronomy writer Dickinson onthis gigantic odyssey on other worlds, his latest book for young readers. http://www.fireflybooks.com/books/1895565707E.html

Search Catalog Astronomy Calendars Children's Books Cookbooks Gardening General Non-Fiction Health How to Natural History, Animals and Pets Pictorial and Photography Reference and Encyclopedias Sports Sybex Computer Books Home Page Other Worlds A Beginner's Guide to Planets and Moons by Terence Dickinson DESCRIPTION What are other planets like? Do they have air and clouds? Water and rocks? Could we walk on the moons of Saturn? Are there planets orbiting around other stars? Using colorfully dramatic but scientifically accurate illustrations, as well as the latest spacecraft and Hubble Space Telescope portraits of other worlds, Terence Dickinson answers these questions and more in Other Worlds , a fact- and fun-filled tour of the solar system's 9 planets, their 61 known moons and the suspected planets of other stars in our galaxy. Stand on the rim of a Martian canyon, watch solar systems being born, visit a sulfur-spewing volcano on Jupiter's moon Io (pronounced EYE-oh), plunge into the red atmosphere of Saturn's moon Titan and gaze at the swirling su! rface of a brown dwarf. Travel with award-winning astronomy writer Dickinson on this gigantic odyssey on Other Worlds , his latest book for young readers.

14. Firefly Books - Other Worlds other worlds A Beginner's Guide to Planets and Moons by Terence Dickinson. EXCERPTFROM BOOK. Return to astronomy. Return to Space astronomy Children's Books. http://www.fireflybooks.com/books/1895565707A.html

Search Catalog Astronomy Calendars Children's Books Cookbooks Gardening General Non-Fiction Health How to Natural History, Animals and Pets Pictorial and Photography Reference and Encyclopedias Sports Sybex Computer Books Home Page Other Worlds A Beginner's Guide to Planets and Moons by Terence Dickinson Reading level: Ages 10 and up / Grades 5-12 (1995) 64 pages / 8" x 8 1/4" Full color illustrations ISBN: 1-895565-70-7 paper $9.95 ISBN: 1-895565-71-5 hardcover $19.95 DESCRIPTION TABLE OF CONTENTS EXCERPT FROM BOOK Return to Astronomy ... [contact webmaster] http://www.fireflybooks.com/books/1895565707A.html

15. ASP: Astronomy And The Environment in astronomy, July 1999, p. 36. Profile of John Rummel, NASA's Planetary ProtectionOfficer, whose task it is to see that microorganisms from other worlds don http://www.astrosociety.org/education/resources/environment02.html

home education SEARCH ASP SITE: Education Topics: Programs Activities Resources The Universe in ... Forums Environmental Issues and Astronomy: An Introductory Resource Guide 3. Radio Interference Radio astronomer search for "faint" radio static from cosmic objects. Increasingly, the signals they are searching for are lost in the "din" of terrestrial radio communications, particularly the requirements of cellular phones and other modern communications using satellites. Major political battles loom as the demands of business clash with the need to protect certain important channels for radio astronomy. Readings Carpenter, S. "Lost Space: Rising Din Threatens Radio Astronomy" in Science News, Sep. 11, 1999, vol. 156, p. 168. Good summary of current situation. Cohen, J. "Radio Pollution: The Invisible Threat to Radio Astronomy" in (a journal of the Royal Astronomical Society), Dec. 1999, vol. 40, issue 6, p. 8. Good review from a European perspective.

16. ASP: Good Astronomy Activities On The WWW Good astronomy Activities on the World Wide Web. of the mass of the planets by askingif the Earth's mass were 1 penny, how many pennies for the other worlds. http://www.astrosociety.org/education/activities/astroacts03.html

home education SEARCH ASP SITE: Education Topics: Programs Activities Hands-On Astronomy ... Forums Good Astronomy Activities on the World Wide Web Planets and Satellites: General Students model and explore how we tell a body in space is rotating. First they simulate rotation in the school yard, and then they watch movies on the internet that show both planetary features and sun-spots rotate. [e,m] Crazy Craters In this nice activity from the book Moons of Jupiter from the GEMS Program at the Lawrence Hall of Science, students do a variety of activities to simulate how cratering occurs by dropping and throwing objects at a chocolate-powder surface on top of flour. This is perhaps the most thorough version of a classic activity (see the "Impact Cratering" ones later in this section.) [a] Exploring the Planets: Using Images Students examine some intriguing images from planetary exploration and try figure out what they are seeing. Dennis Schatz' "Planet Picking" activity does this better, but this one is on the Web. [a] Flexing Muscles and Moons Students measure the effect of gravitational flexing (which keeps Io and Europa's interior warm) by taking the temperature of some flexible rubber balls. They also do calculations about the force of gravity. [m]

17. OTHER WORLDS and links to other Mars sites. Centre Home of the HR Macmillan Planetarium and GordonMacmillan Southam Observatory The Star*s Family of astronomy Resources A http://www.cybertown.com/otherw.html

The Nine Planets An absolutely wonderfully detailed look at the nine planets in the Solar System to which the planet Earth belongs. Welcome to the Planets Liftoff to Space Exploration Includes Mission Information, JPL Space Calendar for updated launch schedules, Liftoff Academy and pick's of What's Cool. LunaCity Designed to provide information and a jumping off point for people interested in space, space development, rockets, science fiction, space travel and the future. It's primarily focused on what's happening now, and what you can do to help make the future better than the present. Space Images The Lunar Resources Company The Lunar Resources Company is "organized to advance and engage in space flight as a commercial enterprise, to establish and operate a permanent manned lunar base, and to transact any and all lawful businesson Earth, in outer space, and on other celestial bodiesfor which corporations may be incorporated under the Texas Business Corporation Act" actually it mostly comprises an excellent collection of mostly fascinating space links. Mars Map A WWW-browsable, zoomable and scrollable atlas of Mars, showing the locations (footprints) of thousands of high-resolution Viking Orbiter images. and links to other Mars sites.

18. OTHER WORLDS CREATED ON 16.1.98 - FIRST ATTEMPT other worlds astronomy Picture of the Day Hot Topics and Nice Images The NSSDC Photogallery Hubble Space Telescope's Best Images of 19901995 The astronomy http://www.physics.nus.edu.sg/~phyctt/llinks.htm

Some Links Other worlds Astronomy Picture of the Day Hot Topics and Nice Images The NSSDC Photo gallery ... Astronomical software

19. ArtClicks : Science/Astronomy/Other_Worlds Science astronomy other worlds. http://artclicks.com/links/pages/Science/Astronomy/Other_Worlds/

Home Add a Resource Modify a Resource What's New ... Astronomy : Other Worlds Science : Astronomy : Other Worlds Victor Navarone Info Rate It 3D computer graphics and animation Amber's Dragon Lair Info Rate It ceramic dragons, folklore, poems, icons and a classified section. Betsubetsu Info Rate It graphic artist Dr. Bob's Galaxy Landscapes Info Rate It computer artist. KarmaStorm Info Rate It animated art Middle Earth Art Info Rate It by the brothers Hildebrandt Monsters in Your Head Info Rate It clay creature sculptures. Planet Graphix Info Rate It alien clip art. The Creator of all dot com Info Rate It The creator posing as webmaster artist. The Darque Dragon Inn Info Rate It Welcome, traveler, to this darque little corner of my soul... Next 10 Search More search options The 5 most recently added links Gossamer Threads Inc.

20. Astronomy 207T Syllabus last revised 10/9/02 Fall 2002 astronomy 207T Course Syllabus. MEETING.TOPIC. Week 1, History of Thought About Life on other worlds http://www.williams.edu/Astronomy/Course-Pages/207T/syllabus.html

last revised 10/9/02 Fall 2002 ASTRONOMY 207T Course Syllabus MEETING TOPIC READING: SI = Social Implications of the Detection of an Extraterrestrial Civilization = Schow 4-Hour Reserve 9/5, 8:30 PM Introductory Group Meeting in TPL 113 BRING YOUR SCHEDULES! Week 1 History of Thought About Life on Other Worlds Q: Describe and defend your choice for the two most important historical events ( one pre-1900, one post-1900) affecting humanity's conception about the possibility of life on other worlds. SI: Ch. 2 Dick, "Life on Other Worlds": Introduction, Ch. 1, Ch. 4 Lewis,"Worlds Without End": Ch. 1 Week 2 Life on Earth. Life Elsewhere? Q: What does it mean for matter to be "alive"? Has Earth been the only conceivable cradle of life? Present and defend one of the current views of the origin of life on Earth. Orgel; Davies (Interplanetary Infestations, Superbugs); Time Week 3 Location, Location, Location! Q: Discuss how the phrase "habitable zone" has expanded beyond its original meaning. How has the envelope been stretched, and how might it be extended further? Kirshner; LePage;

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