The Solar System

CHAPTER 26 | ASTROBIOLOGY: LIFE ON OTHER WORLDS 593 layers under the surfaces of Ganymede and Callisto. Th at can change as the ...

594 PART 5^ |^ LIFE region within which orbiting planets have temperatures permit- ting the existence of liquid water. Th e sun’ ...

CHAPTER 26 | ASTROBIOLOGY: LIFE ON OTHER WORLDS 595 Although the 1974 Arecibo beacon was the only powerful signal sent purposely ...

596 PART 5^ |^ LIFE Has Earth been visited by aliens? If you conclude that there is likely to be life on other worlds, then you ...

CHAPTER 26 | ASTROBIOLOGY: LIFE ON OTHER WORLDS 597 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 1 0 0 1 0 0 1 0 1 1 1 0 5 rows of 7 An ant ...

598 PART 5^ |^ LIFE likely to be detected. For a star with a life span of 10 billion years, fS might conceivably range from 10−8 ...

CHAPTER 26 | ASTROBIOLOGY: LIFE ON OTHER WORLDS 599 What Are We? Matter and Spirit There are over 4000 religions around the worl ...

600 PART 5^ |^ LIFE expected, given the wide variety of living things now found in extreme environments on Earth. Tidally heated ...

CHAPTER 26 | ASTROBIOLOGY: LIFE ON OTHER WORLDS 601 Discussion Questions Do you expect that hypothetical alien recipients of th ...

602 Earth photographed by Voyager 1 from the edge of the solar system. (NASA) Afterword Th e aggregate of all our joys and suff ...

AFTERWORD 603 O ur journey together is over; but, before we part company, let’s ponder one fi nal time the primary theme of this ...

604 APPENDIX A Introduction The metric system is used worldwide as the system of units, not only in science but also in engineer ...

APPENDIX A 605 Very small numbers can also be written with powers of 10. For example, the wavelength of visible light is about 0 ...

606 APPENDIX A Astronomy Units and Constants Astronomy, and science in general, is a way of learning about nature and understand ...

APPENDIX A 607 ■ Table A-7 ❙ Properties of Main-Sequence Stars Spectral Type Absolute Visual Magnitude (Mv) Luminosity* Temp. (K ...

608 APPENDIX A ■ Table A-9 ❙ The 15 Nearest Stars Name Absolute Magnitude (Mv) Distance (ly) Spectral Type Apparent Visual Magni ...

APPENDIX A 609 ■ Table A-11 ❙ Principal Satellites of the Solar System Planet Satellite Radius (km) Distance from Planet (10^3 k ...

610 APPENDIX A ■ Table A-13 ❙ Greatest Elongations of Mercury* Evening Sky Morning Sky Dec. 18, 2009 Apr. 8, 2010** Aug. 7, 2010 ...

APPENDIX AAPPENDIX A 611611 ■ Table A-16 ❙ Periodic Table of the Elements 58 Ce 140.1 59 Pr 140.9 60 Nd 144.2 61 Pm (145) 62 Sm ...

612 APPENDIX B Observing the sky with the naked eye is as important to modern astronomy as picking up pretty pebbles is to moder ...