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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.

      • Chemistry
        June 2013

        Higgs gevonden

        Complete overview of the building blocks of matter (tr.)

        by Rob Walrecht & Luc Hendriks

        Code B04 - English translation of title: Higgs found In July 2012 scientists announced that they had found the Higgs particle, with almost 100% certainty. This booklet, published a few months later, is a complete overview of matter, from atoms and molecules, via protons, neutrons and electrons, to the elementary particles that make up all matter and energy that we know. This book is useful for everyone who is interested in the basics of matter. The first chapter is about atoms, molecules, protons, neutrons and electrons; the Periodic Table, atom mass and atom number; chemical reactions; ions and ionisation; isotopes and radioactivity and more. It is for ages 14 years and up. The second chapter is an introduction to particle physics: elementary particles and the Standard Model; and particle-wave duality – so for older youngsters. The third chapter is about the Higgs particle, the theory, particle accelerators and the 50 years long and quite expensive search for this elusive particle. And do you measure the Higgs particle? With many illustrations (including an adapted Standard Model) and pictures.

      • 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

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