Exploring SpaceCHAPTER

thethe BIGBIG ideaidea

People develop and use technology to explore and study space.

Some space objects are visible to the human eye.1.11.1

Telescopes allow us to study space from Earth.1.21.2

Spacecraft help us explore beyond Earth.1.31.3

Space exploration benefits society.1.41.4

CHAPTER OUTLINE

NEW CHAPTER

VOCABULARY

KEY CONCEPT CHAPTER HOME

solar system

galaxy

orbit

Some space objects are visible to the human eye.

1.11.1

SECTION OUTLINESECTION OUTLINE

universe

• Gravity causes objects in space to be grouped together in different ways.

• Stars form patterns in the sky.

• The sky seems to turn as Earth rotates.

constellation

VOCABULARY

KEY CONCEPT CHAPTER HOME

Telescopes allow us to study space from Earth.

1.21.2

SECTIONOUTLINESECTIONOUTLINE

electromagnetic radiation

spectrum

wavelength

telescope

Each form of electromagnetic radiation provides different information about objects in space. Astronomers use different types of telescopes to gather visible light and other forms of radiation.

VOCABULARY

KEY CONCEPT CHAPTER HOME

Spacecraft help us explore beyond Earth.

satellite

1.31.3

SECTIONOUTLINESECTIONOUTLINE

Astronauts can explore space near Earth. Spacecraft without crews carry instruments to other worlds. A flyby mission usually provides data from several bodies in space. Orbiters, landers, and probes gather data from one planet or body.

space station

lander

probe

VOCABULARY

KEY CONCEPT CHAPTER HOME

Space exploration benefits society.

impact crater

1.41.4

SECTIONOUTLINESECTIONOUTLINE

Space exploration has taught us about Earth’s development. It has also provided technology that has important uses on Earth.

This boy communicates using technology developed by designers at NASA.

VOCABULARY

KEY CONCEPT CHAPTER HOME

I. Some space objects are visible to the human eye.

A. We see patterns in the universe.

B. The sky seems to turn as Earth rotates.

1.11.1

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

1. Arrangement of the Universe

2. Constellations

Some space objects are visible to the human eye.

C. The movements of planets and other nearby objects are visible from Earth.

solar system

galaxy

orbit

universe

constellation

VOCABULARY

KEY CONCEPT CHAPTER HOME

II. Telescopes allow us to study space from Earth.

1.21.2

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

A. Light and other forms of radiation carry information about space.

B. Astronomers use telescopes to collect information about space.

Telescopes allow us to study space from Earth.

1. Visible-Light, Infrared, and Ultraviolet Telescopes

2. Radio Telescopes

electromagnetic radiation

spectrum

wavelength

telescope

3. Telescopes in Space

VOCABULARY

KEY CONCEPT CHAPTER HOME

III. Spacecraft help us explore beyond Earth.

A. Astronauts explore space near Earth.

B. Spacecraft carry instruments to other worlds.

1.31.3

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

Spacecraft help us explore beyond Earth.

1. Flybys

satellite

space station

lander

probe

2. Orbiters

3. Landers and Probes

4. Combining Missions

1. Moon Missions

2. Orbiting Earth

VOCABULARY

KEY CONCEPT CHAPTER HOME

IV. Space exploration benefits society.

A. Space exploration has given us new viewpoints.

B. Space technology has practical uses.

1.41.4 Space exploration benefits society.

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

1. Surface Features

2. Atmosphere

impact crater

1. Satellite Views of Earth

2. Technology Spinoffs