Alien Oceans) [Pdf/E–book] À Kevin Peter Hand

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I ve always maintained a bit of an interest in Space Exploration And Over The Past Over The Past Of Decades I exploration and over the past couple of decades I read with some amazement of the discovery of subsurface oceans of water in some of the bodies of the outer Solar System This book provides a comprehensive overview of these discoveriesTo begin with the author explains how scientists came to discover the existence of the oceans Suffice to say it s not simply a matter of looking through a telescope Right throughout the book though the author explains the relevant physics maths chemistry and biology in ways that are very clear to the laymanThe book Concentrates On Europa Enceladus And on Europa Enceladus and where the existence of oceans has been established beyond doubt There s a fairly heavy emphasis on Europa which the author sees as the most likely world to harbour life In one chapter he does a brief tour of Ganymede Callisto Triton and Pluto which are also worlds that are very likely to have subsurface oceansAfter discussing the science of the alien oceans the author moves onto speculate not just whether these worlds have life but what sort of life they may have He admits that this section of the book is pure conjecture but adds that it s something that is fun to ponder I think this part of the book has to be read in that spirit as it is indeed very speculative It then finishes strongly with a description of what the next steps might be in investigating the ocean worlds There are likely to be two missions to orbit Jupiter s icy moons in the late 2020s one from NASA and one from the European Space Agency and he hopes that a landing on Europa might be achieved by the mid 2040sIt s not part of the book but my own feeling is that if we do find than one world with life within a single planetary system then it s reasonably safe to assume that microbial life at least will have arisen in vast numbers of other worlds within our alaxyI listened to the audio version of this book which maybe wasn t the best choice as it s the sort of the book I would like to refer back to and it s less easy to do that with audio The author narrates his own book and whilst he doesn t do a bad job I didn t think he was as ood as a trained narratorIf like me you have an interest in the subject you will find this to be absolutely fascinating This is a really interesting look at the state of astrobiology at the time of its writing and like the science itself has a sometimes frustrating mix of brilliant hard science with wild speculationThe science on how we know that the outer planet s moons have seas is fascinating reading and varies between extremely direct flying the Cassini probe through the water plumes from Saturn s moon Enceladus to the speculative where the evidence isn t uite as strong the outer moons of Jupiter for instanceLikewise the discussion of alternate biochemistry is also interesting if a bit speculative At least it ives some likely alternativesWhere it all comes a bit unstuck for me is some much wilder speculation later in the book about actual icy moon ecosystems and life forms It just doesn t really fit with the harder science in most of the rest of the bookStill I think the first two thirds is ood enough reason to read this Wow this was actually better than I anticipated So although the title may hint to a fantasy book it s really about places in our solar system that may have suitable conditions for life to emerge Not exactly Green Martians type of life but at least some microbialThe book starts off about diving deep down into our own oceans here on planet Earth and then draws parallels to the somewhat similar conditions found in our solar system It concentrates mostly on moons such as Europa Enceladus and Titan but since the author who was also the narrator is a huge fan of the topic himself worked with NASA for years etc his writing style is captivating and thought provoking Clearly he s been practicing well by iving public speeches on the topic DAs I have a 9 year old cosmos enthusiast rowing at home the issues discussed here in this book weren t foreign to me We ve watched many a documentary about what the scientists have managed to find out about these moons thus far which missions have been sent to investigate the relevant areas in our solar system etcI personally liked a lot the latter half of his book where he rather philosophized about the possible scenarios how life could have developed there which might be it s so to say intelligence level and so forth Also it was heart warming to see a uote from a fantasy book As the subtitle says it s about the possibilities for life in deep oceans like those on Europa Enceladus and other moons in our solar system and in comp. Inside the epic uest to find life on the water rich moons at the outer reaches of the solar systemWhere is the best place to find life beyond Earth We often look to Mars as the most promising site in our solar system but recent scientific missions have revealed that some of the most habitable real estate may actually lie farther away Beneath the frozen crusts of several of the small ice covered moons of Jupiter and Saturn lurk vast oceans that may have been in existence for as long as Earth and together. .

Down Around Midnight
Alien Oceans

Kevin Peter Hand ✓ 5 Read

Book is a ood primer on the possibilities for life there Most people who have a passing interest in astronomy and astrobiology are well for life there Most people who have a passing interest in astronomy and astrobiology are well that the most likely candidates to sustain recognizable life in our own solar system are the moons of the as iant planets These uniue little worlds unto themselves have a staggering array of composition and environment Some are obviously barren bits of rock others like Io offer the largest amount of volcanic activity in the solar system and others are bizarre ice worlds which likely contain their own oceans deep underneath this massive protective layer In the contain their own oceans deep underneath this massive protective layer In the Kevin Peter hand makes the case for the most likely contenders among these aforementioned stellar bodies for for the most likely contenders among these aforementioned stellar bodies for conditions necessary and conducive to life to be two moons of Saturn Enceladus and Titan and Jupiter s Europa Beginning with his background in the study of our own oceans on Earth Hand lays out the history of development leading to our ability to understand the necessary oceanic conditions for life the recent history of hydrothermal vents and the exploration of our solar system already conducted in the area of Saturn and Jupiter s moons This was all fascinating new history to me and he certainly makes a fine argument for his list though I would also include Ganymede on the short listhowever this is hardly my profession so I will of course yield to the expert Anyway the concluding two sections summarize what we know of the origins of life on our own planet and the future steps we need to take to adeuately understand the moon worlds he has so deftly described If you are already up on the literature as pertains to Earth s early life forms you likely don t need to read much of section 3 however I would certainly recommend the final section especially Pure Land Buddhism in Modern Japanese Culture given the rate of development we are currently seeing from the partnering of NASA with private companies such as SpaceX He frames the discussion uite interestingly in that our own study of Earth s oceans has piggybacked on in most cases outdated military euipment that was not the most efficient mechanism possible butot the job done Also iven how freuently NASA s budget is used as a political football seeking funding and advancement outside of this overnment agency is a pressing necessity Anyway this book certainly delivers on its promise and you will certainly leave it with a Traditions Of Maimonideanism (Ijs Studies In Judaica) great awareness of the worlds possible on Europa Enceladus and Titan Need to re read it toet all of these beautiful scientific details Astrobiologists now agree that the best immediate hope for finding life elsewhere is not on a planet orbiting a distant star but in the watery interiors of moons orbiting the Kemilau Cinta - Brighter Than the Sun giant planets of our Solar System Jupiter and Saturn They used to think that water which seems to be essential for life as we know it could only exist in the Goldilocks Zone around the Sun where warmth comes from the Sun itself but they now realise that these moons can be kept hot inside by tidal forces stretching and sueezing them as the move through theravitational field of their planetary parents Kevin Hand s book is partly about the discoveries made by spaceprobes that have visited these moons partly about the origin of life and partly an adventure story because in pursuit of the origin of life he has been on deep dives to the bottom of the ocean on Earth to observe the strange creatures which live there This is a pretty heady mixture and pretty well put together But I only ive it four stars because there are a few ouch moments The worst is when Hand says The elements in the Sun are the same as the elements found here on Earth without explaining that this is what people thought roughly a hundred years ago but was disproved by one of my astronomical heroes Cecilia Payne in the 1920s We also et a rather dodgy story about his encounters with airport security which if true cast him in a very bad light Did he really deliberately try to set off the metal detectors On the science side it would have been Red November: Inside the Secret U.S.-Soviet Submarine War good to have some discussion of the latest thinking about the origin of our kind of life eukaryotic life which is much interesting than the out of date version he provides And at a trivial level it is only Americans these days who use degrees Fahrenheit without eveniving a conversion to the units used by everyone else But the main message of the book is compelling and makes it well worth readingIf our solar system is any uide ocean worlds may provide ten to a hundred times the volume of liuid water found on worlds like Earth with oceans on their surfaces What might this mean for the emergence of intelligent life throughout our solar system and beyond Simply amazing. St within moons of the outer solar system like Europa Titan and Enceladus He shows how the exploration of Earth's oceans is informing our understanding of the potential habitability of these icy moons and draws lessons from what we have learned about the origins of life on our own planet to consider how life could arise on these distant worlds Alien Oceans describes what lies ahead in our search for life in our solar system and beyond setting the stage for the transformative discoveries that may await .
Arable environments elsewhere and about the ways we d search for itExecutive summary This is a pure delight If the subject interests you you are likely love this for itExecutive summary This is a pure delight If the subject interests you you are likely love this much as I didIn the opening chapters Hand discusses something that was new to me the precise measurements spacecraft take while out yonder that lead to conclusions like this moon has a mass of 36 rams per cubic centimeter and how results like that in turn support the modeling that leads to a sense of how the interior of a moon is layered There s a lot here about cosmic ray measurement etting precise navigational Fixes As Competing Gravitational as competing ravitational tug a Spacecraft Back And Forth Sampling Gases Via back and forth sampling A Writer's Reference with Writing about Literature with 2009 MLA and 2010 APA Updates gases via spectrometer and Some of it frankly went over my head so to speak but that s fine I stillot a ood overview of the field and a fresh appreciation for a lot of people s workI already had high regard for everyone involved with working around Galileo s main antenna deployment failure Even so now And how ood it is to have reasons for amazed respect rightHe moves to discuss competing theories of how life made the steps from organic chemistry to actual organisms kinds of environments within 50 km deep oceans under 30 km thick layers of ice that could be ood for life his own experience and the work of others observing at deep sea vents on Earth possibilities for life supporting chemistry and organism development using elements and molecules life doesn t use on Earth and so much The flow from one topic to another is excellent Hand doesn t just know his subject he s excellent at explaining it and shows reat practice at itOne thing I particularly like is how specifically he credits individuals and teams for discoveries inventions and ongoing research Everything here is in the active voice science doesn t just happen in an abstract way people are always doing things and learning from them He repeatedly writes with An Audience of Artists: Dada, Neo-Dada, and the Emergence of Abstract Expressionism great enthusiasm and admiration for all his many colleagues sometimesoing into biographical sketches particularly when it comes to women who overcome extra adversities to reach positions of leadership He s also very clear throughout about distinguishing athered data from their interpretation and well anchored conclusions from speculation and outright flights of fancy He is careful to avoid using anyone s authority to ive weight than is due for Aristotle's Rhetoric: An Art of Character guesses no matter how much fun he s having at the latter sometimesSo this is just areat science book covering an interesting subject in a way only an active participant can I had this in the version from Audible he reads his own book and does it very well He s Anthropology as Cultural Critique: An Experimental Moment in the Human Sciences good to listen to as well as to readBig thumbs up The subtitle for this book ironically whatot me interested along with an interview with the author on the Planetary Society podcast really does not do it justiceHand writes about than just the specifics of the Alien Oceans of Europa Enceladus and Titan though he knows this is the hook for his audience He writes about the chemistry and biology of our own oceans and the physics and Anaphora and Conceptual Structure geology of our own planet Hand expertlyrounds us in our own local scientific processes that we might be better informed and prepared to share in the life hosting potential of these other placesIn telling me why these places are leading candidates for life in our Solar System Hand weaves in a scientific narrative of the how and why of life here on Earth in a way that I can both understand and appreciateHe then theorizes what forms potential life might take in these other worlds Like all true theories Hand s musings are respectful of the science they extrapolateFinishing this book I searched through the author s notes for complementary reading the true sign of a successful piece of nonfiction Highly recommended Having just read The Sirens of Mars by another JPL alum I feel for Kevin Hand Exploration of Mars has Between Silences gotten the lion s share of funding at NASA in the last twenty five years so when Hand wants to cite data in reference to his thoughts on the possibilities of life on the watery icy moons of the outer Solar System the data is both old and scant That said what we do know is intriguing and it would seem that NASA wouldladly mount interesting missions to Europa one of Jupiter s promising moons and to other Jovian moons if Congress would appropriate funds It seems unlikely though that the focus on Mars will end soon especially since Mars is so much easier to reach Jupiter is on average eight times further from Earth than Mars so etting to the vicinity of Europa is just harder It will be uite some time before we know even a fraction as much about the ice moons as we do about Mars but in the meantime Hand May contain than fifty times its total volume of liuid water Could there be organisms living in their depths Alien Oceans reveals the science behind the thrilling uest to find outKevin Peter Hand is one of today's leading NASA scientists and his pioneering research has taken him on expeditions around the world In this captivating account of scientific discovery he brings together insights from planetary science biology and the adventures of scientists like himself to explain how we know that oceans exi. .