Anita Yasuda - Explore Comets and Asteroids!: With 25 Great Projects
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Have you ever wished on a shooting star? Shooting stars often appear when the earth passes through the dust and debris left by a passing comet. Explore Comets and Asteroids! With 25 Amazing Projects takes readers ages 7 to 10 on a fantastic journey through space, where they investigate comets, asteroids, and lesser-known space wonders through 25 experiments and activities designed for curious kids.
Readers learn about everything from the first asteroid discovered to many current spacecraft missions. They also investigate famous comets, such Halleys comet, which returns faithfully every 75 or 76 years.
Learning about comets and asteroids means asking lots of questions. Could we live and work on asteroids? Why do we only occasionally see comets? Kids find the answers and more through hands-on projects and experiments that encourage them to be curious about how and why things work. Activities range from mapping the positions of celestial objects to designing spacecraft for asteroid missions. By combining science with activities, fun facts, and cartoons, kids will investigate, create, design, test, and redesign. Explore Comets and Asteroids! inspires kids to want to know more about how these rocky worlds formed and how they may have shaped life on Earth.
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66 MILLION YEARS AGO:
An asteroid slams into Earth and is thought to have led to the loss of 80 percent of life on Earth, including dinosaurs.
240 BCE:
Chinese astronomers are the first to record what is later named Halleys Comet.
1070s CE:
Halleys Comet is embroidered on the Bayeux Tapestry.
1577:
Danish astronomer Tycho Brahe makes careful measurements of a comets path, leading him to believe that a comets orbit extends beyond the moon.
1759:
The comet returns on March 13, as predicted by Edmond Halley, and is named after him, Halleys Comet.
1786:
German astronomer Caroline Herschel becomes the first woman to discover a comet. She goes on to find seven more.
1801:
Giuseppe Piazzi discovers the first known asteroid, Ceres, between the orbits of Mars and Jupiter.
1833:
The Leonid meteor storm amazes sky watchers in the United States.
1847:
Maria Mitchell discovers a new comet.
1891:
Max Wolf becomes the first person to discover an asteroid using photography.
1898:
Gustav Witt discovers the asteroid Eros, which is one of the largest asteroids ever found near Earth.
1920:
The worlds largest meteorite, the Hoba Meteorite, is discovered by a farmer in Namibia, Africa.
1943:
Kenneth Edgeworth suggests that there is a disc of comets beyond Neptunes orbit.
1950:
Jan Oort predicts that there is a huge cloud of comets beyond the sun.
1951:
Gerard Kuiper suggests that short-period comets lie outside the orbit of Neptune.
1985:
The International Cometary Explorer, ICE , becomes the first spacecraft to fly through the tail of a comet.
1986:
Several space probes are launched to study Halleys comet.
1991:
The Galileo spacecraft obtains the first up-close images of an asteroid (Gaspra) and a first moon orbiting an asteroid.
1992:
David Jewitt and Jane Luu discover the first Kuiper belt object.
JULY 1622 1994:
Fragments of the comet Shoemaker-Levy 9 crash into Jupiter, leaving massive dark scars.
1998:
The Near Earth Object Program begins, tracking asteroids and comets that could be a hazard to Earth.
2001:
The Near Earth Asteroid Rendezvous (NEAR) Shoemaker space probe lands on the asteroid Eros.
2004:
The spacecraft Rosetta begins its journey to rendezvous with the comet 67P/Churyumov-Gerasimenko.
2005:
Astronomers find the largest Kuiper belt object, the asteroid Eris.
2006:
Hayabusa becomes the first probe to land, collect samples, and take off from an asteroid.
2006:
The International Astronomical Union reclassifies Pluto and Ceres as dwarf planets.
2012:
Dawn becomes the first probe to orbit objects in the asteroid belt between Mars and Jupiter.
2014:
Rosetta becomes the first spacecraft to touch down on the surface of a comet.
Would you like to be part of an amazing adventure? The sun has set. Look up! Its time to explore the solar system !
A magical world of stars ripples across the night. Eight planets and millions of asteroids orbit around the sun. There are also visitors to our night sky that do not act like any other objects we can see. They look like fuzzy balls of light. Some of them have lizard-like tails. They are called comets .
WORDS TO KNOW
solar system: a family of eight planets and their moons that orbit the sun.
asteroid: a small rocky object that orbits the sun.
orbit: the path an object in space takes around a star, planet, or moon.
comet: a ball of ice and dust that orbits the sun.
WORDS TO KNOW
crater: a large hole in the ground caused by the impact of something such as a piece of an asteroid or a bomb.
celestial body: a star, planet, moon, or other object in space, such as an asteroid or comet.
astronomy: the study of the universe, especially the celestial bodies.
astronomer: a person who studies the stars, planets, and other objects in space.
Comets and asteroids have stories to tell. These stories are about the history of the solar system. Youll hear these stories as you zip through time and space with Explore Comets and Asteroids!
This book will take you from the outer edges of the solar system to massive craters on Earth. Youll ride on a comets tail. Youll fly by a huge, donut-shaped band of asteroids that orbit the sun between Mars and Jupiter. Many thousands of asteroids call the asteroid belt home. Sometimes, chips off these asteroids and other celestial bodies fall to Earth with a thunderous clap.
As you travel through these pages, youll study astronomy and meet famous astronomers from ancient times. These astronomers were curious about unusual events they saw in the sky and wrote down their observations.
GOOD SCIENCE PRACTICES
Every good scientist keeps a science journal! As you read this book and do the activities, record your observations in a scientific method worksheet, like the one shown here. Scientists use the scientific method to keep their experiments organized.
Step | Example |
1. Question: What are we trying to find out? What problem are we trying to solve? | Can your eyes adjust to see the night sky? |
2. Research: | Books at the town library say that to adjust your eyes to the night sky, keep them closed for five minutes before sky watching. |
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