Robonauts have been built to be substitutes for astronauts. They are made to look and move much like humans so they can take over time-consuming or dangerous space work. This high-interest book lays out the similarities and differences between astronauts and their high-tech doppelgangers.
People once believed that Earth was the center of the solar system. Scientists finally learned that Earth is one of at least eight planets in our solar system and that they all travel around the sun. Astronomers now know that our solar system is almost 5 billion years old and is part of at least 100 billion galaxies in the universe. Earth is the only planet known to have life and water. Scientists continue to discover new planet-like objects, called dwarf planets, all the time!
Long ago, astronomers believed that the Earth was the center of the universe. But now we know that it is only a tiny part of the universe and that our solar system is just a tiny part of our galaxy. In 1957, space travel began. Work done in space has helped us in the areas of medicine, computer science, and the environment. The International Space Station, a lab floating in space, is where astronauts do experiments that help us on Earth. The next manned trip to the moon is planned for 2018.
Home, Sweet Home! This title is about Earth, the planet we live on! The layers of the Earth, how it relates to the other planets in our solar system, and how it is the only known planet to sustain life, as far as we know, are all discussed in this science title. Learn about how the Earth rotates on its axis, giving us day and night, and how it orbits and is warmed by that giant star we call the Sun. This book will allow students to make observations to determine the effect of sunlight on Earth’s surface.
Five and counting! So far, astronomers have discovered five dwarf planets in our solar system. Pluto, which was once thought of as the ninth planet, is today classified as a dwarf planet. This book looks at the current dwarf planets, characteristics, size, and orbital patterns, as well as the three rules scientists follow to characterize these tiny, round space objects. Every day new discoveries are being made. Who knows how many dwarf planets we will find in the future! This book will allow students to understand that patterns in the natural world can be observed, used to describe phenomena, and used as evidence.
Our closest solar system is about 10 light years away. It has two main types of planets. Some are rocky and small, like planet Earth, while others are huge balls of gas, like Jupiter. Learn about how astronomers once thought our solar system was the one and only, to how they have now discovered hundreds of stars with planets orbiting them, which means there could be billions of solar systems in outer space! Just maybe, these alien worlds could host life, like our own amazing planet. This book allows students to use observations of the Sun, moon, and stars to describe patterns that can be predicted.
The four planets farthest from the Sun are called the gas giants. Jupiter, Saturn, Uranus, and Neptune are different from the other planets in our solar system. They are not solid, but are made of liquids and clouds of gas with gravity pulling it all together into a planet shape. Learn facts about the climate, gases, size, and other quirky things each of the planets possess. This book isn't filled with hot air! Pull out your telescope and see if you can observe one of these planets. This book will allow students to understand that patterns in the natural world can be observed, used to describe phenomena, and used as evidence.