1. Chapter 5 Section 1 The Sky from earth

2. What can you see in the night Sky?
Moon- the earth’s only natural satellite
Satellite- is a body that orbits a planet
Planet- an object that orbits the sun
5 are visible from earth without telescope- mercury, Venus, mars, Jupiter, and Saturn
Stars- appear as tiny points of light but are actually giant ball of hot gases mainly composed of hydrogen and helium
Meteors- a streak of light produced when a small object burns up entering earth’s atmosphere
Comet- a cold mixture of dust and ice that gives off long trail of light as it approaches the sun

3. Constellations
Constellation- a pattern or group of stars that people imagined to represent a figure, animal, or object
Western culture identifies 88 constellations
Most are named from ancient Greeks

4. Finding Constellations
Star charts help you identify constellations in the night sky

5. How do objects move in the sky appear to move?
Stars, planets, and other objects appear to move over time.
These objects do move in space, but the actual motions and their apparent, or visible motions may be different.
The apparent motion of objects in the sky depends on the motion of Earth

6. Star Motion Move from east to west through the night
Apparent motion is due to earth turning west to east

7. Seasonal changes
Constellation and star patterns remain the same, however when they are visible varies from season to season
Seasonal changes are caused by the earth’s orbit around the sun
North star is visible year round on earth

8. Planets Planets appear to move along the background of the stars
Planets orbit sun in same plane, they appear to move through a narrow band in the sky
Band is called the zodiac- constellations Taurus, Leo, and Virgo
Planets are seen a different times throughout the night on Earth