Out of this World Space 13.1 Intro to Space Page 400
The questions you asked about Space. How big are stars? How many are there in the universe? Are there aliens? What about gravity? What are the constellations? What are stars? How do they glow?
Vocabulary Wordsfrom pages 400 - 402 Universe Astronomy Constellations Solar System Nonluminous vs. Luminous Star vs. Planet
What is Space like? Space is cold, dark, and very empty. Scattered everywhere are stars, planets, moons, asteroids, comets, meteoroids, and dust. People have spent years looking up at the sky and studying the things in space. First they looked with their eyes, then with telescopes. Today people can travel to space aboard space shuttles, and spacecraft to other planets and moons.
Safety Never look directly at the Sun. You can permanently damage your eyes. Scientist Galileo Galilei went blind after observing the Sun with his telescope. Sunspot Loops in Ultraviolet
The Universe The Universe is everything that exists, including all matter and energy everywhere.
Astronomy Astronomy is the study of what is beyond the Earth. It is the oldest science. As early as 2000 BC, Babylonians were using the sundial, the oldest known instrument for telling time. The shadow of the sundial correlates with the Sun’s position in the sky and hence with the time of day.
Star Constellations A constellation is group of stars that seem to form a pattern. This is a picture of what ancient people thought the constellation Leo looked like.
The Solar System • Consists of our Sun and all of the objects that travel around it. Including planets and their moons. • Planets and moons are non-luminous (they do not emit their own light). • The Sun and Stars are luminous (they emit their own light).
Progression Activity • Draw the solar system in your notebook from page 401. • Label the planets and give two facts about each planet from the text book. • Copy table 1, comparing planets and stars in your notebook from page 402.