SPACE

1. SPACE

2. What can we see in the sky? • Star constellations are groups of stars that seem to form shapes or patterns • The stars in constellations may not actually be close to each other but just appear to be • They have been used as calendars, timekeepers, and to help people find their direction on land and in the sea

3. Objects in the solar system • Our solar system consists of our Sun, the eight planets, and the moons that surround some of the planets • Planets and moons are nonluminous – they don’t emit their own light. If we see them, it only happens when the Sun reflects off of them toward the Earth • Stars emit their own energy and are luminous

4. Comparing Planets and Stars

5. The planets, in order from the sun are • Mercury • Venus • Earth • Mars • Jupiter • Saturn • Uranus • Neptune

6. The Effects of Planetary Motion Effect of Earth’s Rotation • One type of motion of Earth is rotation (spinning on an axis) • One rotation takes 24h • Causes other objects (stars, sun, moon and planets) to appear to rise in the east and set in the west

8. Effect of Earth’s Revolution • Another motion of the Earth is revolution (movement of one object travelling around another) • It takes Earth one year to revolve around the Sun • Allows us to see different constellations different times of year

10. Effect of Planets’ Motions • Planets will appear to move differently than other stars and appear to move through certain constellations • The planets are travelling around the Sun and they are much closer to us than the stars in the background • Only five of the planets can be seen with the unaided eye: Venus, Mars, Jupiter, Saturn and Mercury