In the ten years preceding publication, the known solar system more than doubled in size. For the first time in almost two centuries an entirely new population of planetary objects was found. This 'Kuiper Belt' of minor planets beyond Neptune revolutionised our understanding of the solar system's formation and finally explained the origin of the enigmatic outer planet Pluto. This is the fascinating story of how theoretical physicists decided that there must be a population of unknown bodies beyond Neptune and how a small band of astronomers set out to find them. What they discovered was a family of ancient planetesimals whose orbits and physical properties were far more complicated than anyone expected. We follow the story of this discovery, and see how astronomers, theoretical physicists and one incredibly dedicated amateur observer came together to explore the frozen boundary of the solar system.

Once perceived as distant, cold, dark, and seemingly unknowable, Pluto had long been marked as the farthest and most unreachable frontier for solar system exploration. The Pluto System After New Horizons is the benchmark research compendium for synthesizing our understanding of the Pluto system. This volume reviews the work of researchers who have spent the last five years assimilating the data returned from New Horizons and the first full scientific synthesis of this fascinating system.

Stephen Marlowe (born Milton Lesser) was an American author of science fiction, mystery novels, and fictional autobiographies of Christopher Columbus, Miguel de Cervantes, and Edgar Allan Poe. This is one of those stories.

A creative boy, Luke, dreams up an adventure where he and his friends journey through the solar system! Learn all about space while acting out this intriguing story. This charming, leveled script includes six roles that are written at varying reading levels, supporting differentiation and English language learner strategies. Teachers can implement differentiated strategies to assign roles to students based on their individual reading levels. This helpful feature is an easy way for teachers to get all of their students involved and engaged in an activity. All students will gain confidence and feel successful while building fluency, regardless of their current reading ability. This script also features a song and poem relating to the story. Through performing this story together, students will practice valuable skills like interacting cooperatively, reading aloud, and using expressive voices and gestures. All of the features in this dynamic, Spanish-translated script make it a great resource for an entire classroom of young readers.

This reader's theater script builds fluency through oral reading. The creative script captures students' interest, so they will want to practice and perform. Included is a fluency lesson and approximate reading levels for the script roles.

New Horizons was designed by NASA to study Pluto and the fringes of our solar system, farther away than any spacecraft has ever explored. Join science writer Elaine Scott as she tells the story of this mission. For Stephen Hawking, New Horizons signifies that "We explore because we are human and we want to know." This remarkable ship, no bigger than a piano, and using no more energy than a lightbulb, has already traveled three billion miles out to Pluto, and is continuing on to the Kuiper Belt, the farthest reaches of our solar system. The book will feature the beautiful, amazingly sharp photographs it is sending back from its journey, which are letting scientists fill in the blanks in our knowledge of Pluto--and delivering a few surprises along the way. Elaine Scott tells the exciting story of everyone's favorite planet, from Pluto's discovery through the frustrating attempts to study such a distant object, the creation of the New Horizons project, scientists' hopes and expectations for the mission, and what is being discovered. Her clear, engaging prose does more than narrate the events. By showing how scientists operate, their hypotheses, hopes, and disappointments, and how they make use of them, she gives readers an inspiring portrait of the scientific method itself.

Discovering Pluto is an authoritative account of the exploration of Pluto and its moons, from the first inklings of tentative knowledge through the exciting discoveries made during the flyby of the NASA New Horizons research spacecraft in July 2015. Co-author Dale P. Cruikshank was a co-investigator on the New Horizons mission, while co-author William Sheehan is a noted historian of the Solar System. Telling the tale of Pluto’s discovery, the authors recount the grand story of our unfolding knowledge of the outer Solar System, from William Herschel’s serendipitous discovery of Uranus in 1781, to the mathematical prediction of Neptune’s existence, to Percival Lowell’s studies of the wayward motions of those giant planets leading to his prediction of another world farther out. Lowell’s efforts led to Clyde Tombaugh’s heroic search and discovery of Pluto—then a mere speck in the telescope—at Lowell Observatory in 1930. Pluto was finally recognized as the premier body in the Kuiper Belt, the so-called third zone of our Solar System. The first zone contains the terrestrial planets (Mercury through Mars) and the asteroid belt; the second, the gas-giant planets Jupiter through Neptune. The third zone, holding Pluto and the rest of the Kuiper Belt, is the largest and most populous region of the solar system. Now well beyond Pluto, New Horizons will continue to wend its lonely way through the galaxy, but it is still transmitting data, even today. Its ultimate legacy may be to inspire future generations to uncover more secrets of Pluto, the Solar System, and the Universe.