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      • Astronomy, space & time

        Zonnestelselmodel (Solar System Scale Model) 1:100 billion (Dutch)

        The perfect tool to learn all about our Solar System

        by Rob Walrecht

        This unique product is both a scale model and concise encyclopaedia of the Solar System in one! It consists of sixteen information-packed cards (10x12 cm or 4x5 inch), all pertaining to the Sun, the planets, the Moon, asteroids, comets and the new class to which Pluto now belongs, the dwarf planets. These cards are a quick way to learn all there is to know about these objects, as well as being ideal for youngsters, papers and talks! Primarily, however, it is an exquisite scale model (scale 1:100 billion) of our fascinating Solar System, presenting the best possible representation of the distances within our Solar System as well as the unimaginable emptiness of the universe. In this scale model, the Sun is the size of a marble (14 mm), Jupiter, which is at 8 m/26 ft from the Sun, as large as a plastic pin-head, the Earth (at 1.5 m/5 ft) as large a  grain of coarse sand, Mars (at 2.3 m/7.5 ft) as large a grain of fine sand and Pluto, which would now be at 47 m/155 ft from the Sun, as large as a dust particle... The scale model, when completely placed, is 64 m (210 ft) long. The closest next star is at 400 km (250 miles) from the Sun! The cards show the sizes of the Heavenly bodies at scale, as well as these sizes one hundred times ‘enlarged’, for better comparison of the members of our Solar System. Special standards to place them are included and the cards contain holes to be hung on the wall or from sticks. Available are an English version (with metric units), a US version (with inches, miles, Fahrenheit etc.) and a Dutch version.

      • Astronomy, space & time

        Solar System Scale Model 1:100 billion (US edition)

        The perfect tool to learn all about our Solar System

        by Rob Walrecht

        This unique product is both a scale model and concise encyclopaedia of the Solar System in one! It consists of sixteen information-packed cards (10x12 cm or 4x5 inch), all pertaining to the Sun, the planets, the Moon, asteroids, comets and the new class to which Pluto now belongs, the dwarf planets. These cards are a quick way to learn all there is to know about these objects, as well as being ideal for youngsters, papers and talks! Primarily, however, it is an exquisite scale model (scale 1:100 billion) of our fascinating Solar System, presenting the best possible representation of the distances within our Solar System as well as the unimaginable emptiness of the universe. This version is made for US customers, as the units used are inches, miles, Fahrenheit etc. In this scale model, the Sun is the size of a marble (14 mm), Jupiter, which is at 8 m/26 ft from the Sun, as large as a plastic pin-head, the Earth (at 1.5 m/5 ft) as large a  grain of coarse sand, Mars (at 2.3 m/7.5 ft) as large a grain of fine sand and Pluto, which would now be at 47 m/155 ft from the Sun, as large as a dust particle... The scale model, when completely placed, is 64 m (210 ft) long. The closest next star is at 400 km (250 miles) from the Sun! The cards show the sizes of the Heavenly bodies at scale, as well as these sizes one hundred times ‘enlarged’, for better comparison of the members of our Solar System. Special standards to place them are included and the cards contain holes to be hung on the wall or from sticks. Available are an English version (with metric units), a US version (with inches, miles, Fahrenheit etc.) and a Dutch version.

      • Astronomy, space & time

        Solar System Scale Model 1:100 billion (metric)

        The perfect tool to learn all about our Solar System

        by Rob Walrecht

        The perfect tool to learn all about our Solar System This unique product is both a scale model and concise encyclopaedia of the Solar System in one! It consists of sixteen information-packed cards (10x12 cm or 4x5 inch), all pertaining to the Sun, the planets, the Moon, asteroids, comets and the new class to which Pluto now belongs, the dwarf planets. These cards are a quick way to learn all there is to know about these objects, as well as being ideal for youngsters, papers and talks! Primarily, however, it is an exquisite scale model (scale 1:100 billion) of our fascinating Solar System, presenting the best possible representation of the distances within our Solar System as well as the unimaginable emptiness of the universe. In this scale model, the Sun is the size of a marble (14 mm), Jupiter, which is at 8 m/26 ft from the Sun, as large as a plastic pin-head, the Earth (at 1.5 m/5 ft) as large a  grain of coarse sand, Mars (at 2.3 m/7.5 ft) as large a grain of fine sand and Pluto, which would now be at 47 m/155 ft from the Sun, as large as a dust particle... The scale model, when completely placed, is 64 m (210 ft) long. The closest next star is at 400 km (250 miles) from the Sun! The cards show the sizes of the Heavenly bodies at scale, as well as these sizes one hundred times ‘enlarged’, for better comparison of the members of our Solar System. Special standards to place them are included and the cards contain holes to be hung on the wall or from sticks. Available are an English version (with metric units), a US version (with inches, miles, Fahrenheit etc.) and a Dutch version.

      • Astronomy, space & time

        Astroset 'Sterrenkunde is fun!'

        A set of three wonderful astronomical instruments for youngsters

        by Rob Walrecht

        This is a special set made for youngsters, and consisting of three products: the Solar System Scale Model (scale 1:100 billion), the build-it-yourself Star Wheel and the BIY Sundial. The Solar System Scale Model is a ready made product; the two BIY products are made of high quality 400 gram cardboard. It is a very instructive set, consisting of three veru special products.

      • Astronomy, space & time
        May 2013

        Genieten van de sterrenhemel

        ('Enjoying the Night Sky')

        by Rob Walrecht

        Covering everything that everyone should know about astronomy as it influences our daily lives: the day, the year, the seasons, the changing of the Moon’s ‘shape’, how the planets we see in the sky move, about the time we use, our calendar, the tides.  There are chapters about the Solar System, and stars and the Milky Way, subjects that are much more extensively treated in parts 2 and 3. Including much background information about constellations and star charts, and planispheres in particular. Also contains a wonderful observation programme per season, for the layman. It basically covers the heavens as we can observe it from Earth. First part of series of three, about astronomy (Enjoying Astronomy), for the general public. They are also useful as books for astronomy courses, and written for 12-14 years and up. About 100 wonderful pictures and 90 illustrations.

      • Astronomy, space & time
        July 2013

        Astronomy Posters

        Set of 6 posters about astronomy

        by Rob Walrecht

        The many illustrations in the three astronomy books of our 'Enjoying Astronomy' series are a real treasure and were used to publish a set of six astronomy posters (for now in Dutch only). The posters are coupled to the books: 2 posters made from illustrations of one book. The posters are: 1a. Alles beweegt! De bewegingen van Zon en Maan (Everything moves! The movements of the Sun and Moon). It is an overview of the major celestial movements, causing the ‘day’, the ýear’, the seasons, the phases of the Moon, eclipses and more. Size 50 x 70 cm. 1b. The Stars. Everything about stars: their sizes, colours and temperatures, brightness and more. . Size 50 x 70 cm. 2a. Overview of the Solar System. The Solar System in five steps, with the Inner Solar System (up to the Asteroid Belt; the Outer Solar System (the realm of the giant planets); the Kuiper Belt, the Inner Oort Cloud to the Outer Oort Cloud. Size 50 x 70 cm. 2b. The members of the Solar System; comparisons of groups of Solar System objects: the rocky planets, giants, dwarf planets (and candidate dwarf planets!) and satellites (‘moons’). Also a large ‘familie portrait’ with all the members of the Solar System of 1000 km diameter and larger. Finally the Solar System to scale (up to Neptune). Size 50 x 70 cm. 3a – The Universe. An overview of the Universe, in nine step, from the Inner Solar System to a distance of 1 billion light-years and then to the complete Universe. Size 45 x 95 cm, portrait. 3b. Radiation from the Universe. A complete Electromagnetic Spectrum, almost 1 metre wide.  Also contains a lot of interesting information about the astronomical importance of different wavelengths, with pictures of the great galaxy M 81 (Ursa Major) in radio wavelengths, infrared, visible light, UV, X-rays, gamma rays and combinations. Size 45 x 95 cm, landscape.

      • Astronomy, space & time
        June 2013

        Genieten van het zonnestelsel

        ('Enjoying the Solar System')

        by Rob Walrecht

        This book is like a ‘Grand Tour’ through the Solar System, with a very clear and logical build-up of the subjects, and the use of many specially made illustrations and (written or drawn) scale models. The most important processes that shaped our Solar System are described. This second part of the series takes the reader away from Earth, to discover our ‘neighbourhood’, the Solar System. Second part of series of three, about astronomy (Enjoying Astronomy), for the general public. They are also useful as books for astronomy courses, and written for 12-14 years and up. About 150 wonderful pictures and 60 illustrations

      • Astronomy, space & time
        June 2013

        Genieten van het heelal

        ('Enjoying the Universe')

        by Rob Walrecht

        This book is all about stars and galaxies. After describing the history of astronomy, the writer first explains electromagnetic radiation and matter. Than there is a chapter about distances and how we can measure them. Stars are described in two chapters: ‘from the outside’ (colours, brightness, size, etc.); and ‘their interior’ (how they work).  Chapter 7 is about the Milky Way, chapter 8 about all other galaxies (‘The Universe’). The last chapter is about how it all began, 13.7 billion years ago. This third part of the series takes as away from our Solar System, to go deeper into space, and into the matter! Third part of series of three, about astronomy (Enjoying Astronomy), for the general public. They are also useful as books for astronomy courses, and written for 12-14 years and up. About 125 wonderful pictures and 50 illustrations

      • Space science
        February 1988

        Life Sciences

        Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 to 2015

        by Task Group on Life Sciences, Space Science Board, Commission on Physical Sciences, Mathematics, and Resources, National Research Council

      • Space science
        January 1988

        Mission to Planet Earth

        Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 to 2015

        by Task Group on Earth Sciences, Space Science Board, Commission on Physical Sciences, Mathematics, and Resources, National Research Council

      • Astronautics
        February 1989

        Advanced Power Sources for Space Missions

        by Committee on Advanced Space Based High Power Technologies, Energy Engineering Board, National Research Council

        "Star Wars"--as the Strategic Defense Initiative (SDI) is dubbed--will require reliable sources of immense amounts of energy to power such advanced weapons as lasers and particle beams. Are such power sources available? This study says no, not yet--and points the way toward the kind of energy research and development that is needed to power SDI. Advanced Power Sources for Space Missions presents a comprehensive and objective view of SDI's unprecedented power requirements and the opportunities we have to meet them in a cost-effective manner.

      • Space science
        January 1989

        Space Station Engineering Design Issues

        Report of a Workshop

        by Workshop Committee on Space Station Engineering Design Issues, Aeronautics and Space Engineering Board, National Research Council

        The Space Station Freedom program is the next major U.S. manned space initiative. It has as its objective the establishment of a permanently manned facility in low earth orbit. This book summarizes the main findings and recommendations of a workshop that examined the space station program with a view toward identifying critical engineering issues related to the design and operation of the station.

      • Space science
        January 1990

        Geodesy in the Year 2000

        by Committee on Geodesy, National Research Council

        Geodesy has undergone technological and theoretical changes of immense proportions since the launching of Sputnik. The accuracy of current satellite geodetic data has approached the centimeter level and will improve by one or two orders of magnitude over the next decade. This bodes well for the application of geodetic data to the solution of problems in solid earth, oceanic and atmospheric sciences. The report Geodesy in the Year 2000 addresses many areas of investigation that will benefit from this improvement in accuracy.

      • Space science
        February 1990

        The Search for Life's Origins

        Progress and Future Directions in Planetary Biology and Chemical Evolution

        by Committee on Planetary Biology and Chemical Evolution, Commission on Physical Sciences, Mathematics, and Applications, National Research Council

        The field of planetary biology and chemical evolution draws together experts in astronomy, paleobiology, biochemistry, and space science who work together to understand the evolution of living systems. This field has made exciting discoveries that shed light on how organic compounds came together to form self-replicating molecules--the origin of life. This volume updates that progress and offers recommendations on research programs--including an ambitious effort centered on Mars--to advance the field over the next 10 to 15 years. The book presents a wide range of data and research results on these and other issues: The biogenic elements and their interaction in the interstellar clouds and in solar nebulae. Early planetary environments and the conditions that lead to the origin of life. The evolution of cellular and multicellular life. The search for life outside the solar system. This volume will become required reading for anyone involved in the search for life's beginnings--including exobiologists, geoscientists, planetary scientists, and U.S. space and science policymakers.

      • Space science
        February 1997

        Radiation Hazards to Crews of Interplanetary Missions

        Biological Issues and Research Strategies

        by Task Group on the Biological Effects of Space Radiation, National Research Council

        NASA's long-range plans include possible human exploratory missions to the moon and Mars within the next quarter century. Such missions beyond low Earth orbit will expose crews to transient radiation from solar particle events as well as continuous high-energy galactic cosmic rays ranging from energetic protons with low mean linear energy transfer (LET) to nuclei with high atomic numbers, high energies, and high LET. Because the radiation levels in space are high and the missions long, adequate shielding is needed to minimize the deleterious health effects of exposure to radiation. The knowledge base needed to design shielding involves two sets of factors, each with quantitative uncertainty-the radiation spectra and doses present behind different types of shielding, and the effects of the doses on relevant biological systems. It is only prudent to design shielding that will protect the crew of spacecraft exposed to predicted high, but uncertain, levels of radiation and biological effects. Because of the uncertainties regarding the degree and type of radiation protection needed, a requirement for shielding to protect against large deleterious, but uncertain, biological effects may be imposed, which in turn could result in an unacceptable cost to a mission. It therefore is of interest to reduce these uncertainties in biological effects and shielding requirements for reasons of mission feasibility, safety, and cost.

      • Space science
        February 1997

        Mars Sample Return

        Issues and Recommendations

        by Task Group on Issues in Sample Return, National Research Council

        The Space Studies Board of the National Research Council (NRC) serves as the primary adviser to the National Aeronautics and Space Administration (NASA) on planetary protection policy, the purpose of which is to preserve conditions for future biological and organic exploration of planets and other solar system objects and to protect Earth and its biosphere from potential extraterrestrial sources of contamination. In October 1995 the NRC received a letter from NASA requesting that the Space Studies Board examine and provide advice on planetary protection issues related to possible sample-return missions to near-Earth solar system bodies.

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