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A Traveler's Guide to Mars |  |
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A Traveler's Guide to Mars | |
Conceived and created like a real Baedecker-factual, accessible, heavily illustrated, in a carry-around size-A TRAVELER'S GUIDE TO MARS brings together all the astonishing information scientists have recently learned about Mars, and conveys it in the engaging, lively style that made Dr. Hartmann the first-ever winner of the Carl Sagan Medal for public communication of planetary science. Taken around the planet like tourists, readers will discover mysterious dry riverbeds, the largest volcano in the solar system (three times higher than Mount Everest), a possible ancient sea floor, giant impact craters, "the face on Mars," and other wonders.
Throughout is an Extraordinary selection of photographs, maps, and paintings, including images from Mariner 9 and the Viking explorations, the Hubble Space Telescope, and the ongoing Mars Global Surveyor mission. Four gatefolds show the latest topographic maps of the entire Martian surface. Sidebars advise readers on what to wear and landing procedures. In addition, Hartmann's "My Martian Chronicles" spotlight his life and times as a planetary scientist.
作者简介 William K. Hartmann is known internationally as a scientist, writer, and painter. In 1998 he won the first Carl Sagan Medal from the American Astronomical Society. He is currently a Participating Scientist in the U.S. Mars Global Surveyor Mission, and lives in Tucson, Arizona.
编辑推荐 A Traveler's Guide to Mars revitalizes the Red Planet, leaving readers with the urge to don a spacesuit and take a long trip. With the look and heft of a guide to someplace you might actually go, the book presents Mars as a place of canyons and volcanoes, mesas, and barren plains, not that dissimilar from parts of Earth. Author William K. Hartmann, who participated in the Mars Global Surveyor mission, uses all the photos and data collected by scientists in decades of research to give a thorough, yet not boring, overview of the planet. The most exciting stuff is about water--whether it ever flowed on Mars, where it went, why it's hard to find. Beyond that, there are the rocks, dust, and weather to talk about, and Mars has lots of all three. Sidebars, maps, and chronologies help keep the regions and geology of Mars organized. Hartmann never forgets he's writing for the lay reader, and his style is personable and clear. When answering claims of NASA cover-ups, ancient civilizations, and hidden structures on Mars, he calmly lays out the facts and pictures, urging readers to simply examine the evidence. Hartmann offers a tourist's-eye view of one of our most intriguing planetary neighbors and does more to polish NASA's tarnished image than a thousand press releases. --Therese Littleton
专业书评 "Superb! The text and images combine beautifully to tell the story of the 'new' Mars and how it got to be that way."
—Ray Bradbury, author of The Martian Chronicles and Fahrenheit 451
文摘 A FIRST LOOK AT THE MARTIAN ENVIRONMENT
Mars is half the size of Earth but has roughly the same land area. Early science fiction portrayed Mars as totally alien and unfamiliar, but some aspects of the Martian surface would seem surprisingly recognizable to a human visitor. The Martian day is a bit longer than 24 hours--almost the same as Earth's. The sun rises in the east and sets in the west. The land is a cold but beautiful desert of sand, gravel, rocks, lava, dunes, and strata. Seasonss of spring, summer, fall, and winter follow each other as on Earth, except that they add up to a year that is about twice as long as that on Earth, consisting on 669 Martian days.
WHAT TO WEAR: A LOOK AT MARTIAN WEATHER
On Mars, typical daily air temperatures range from about -87 degrees C (-125 degrees F) at night to a "balmy" -25 degrees C (-13 degrees F) in the afternoon. The soil and rocks absorb sunlight and become much warmer than the air; summer afternoon soil temperatures can rise to 10 degrees C (50 degrees F) or higher. However, soils in the morning and evening, as well as soils just below the surface, are usually much colder, with temperatures of -70 degrees C (-94 degrees F).
The atmosphere of Mars is very thin, almost pure carbon dioxide, with an air pressure typically just less than 1 percent of that on Earth's surface. This is still much less than the pressure of the thin air at 35,000 feet, where commercial jets cruise; it is more similar to the pressure encountered by a high-flying spy jet, 110,000 feet above Earth.
To wander among the dusty hills of Mars, you'd need a space suit similar to that worn by Apollo astronauts on the Moon. Because the soil and rocks of Mars can be much colder than those on the daylit Moon, on which Apollo astronauts landed, Martian visitors would need boots and gloves that are especially insulated.
A particular hazard facing the space-suited explorer is dust. Apollo astronauts had problems with the fine lunar dust
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