1. Sun-Earth-Moon System
January 11, 2016

2. Vocabulary Rotate – to turn or spin on an axis
Revolve – to move in a curved
path or orbit; to go
around something

3. Orbit – the curved path
that an object follows
around a central object
Scale – the ratio between the measurements on a map or model and the actual measurements of an object

4. What did we learn? Lesson 1 – Getting Started
Ancient people used myths and legends to explain what they observed about the Sun and Moon as seen from Earth

5. The Sun
The Sun is a star – it is the largest body in the solar system!
The Sun is much farther away from Earth than the Moon is.
You can fit 109 Earths lined up across the Sun!!!!

6. The Earth
Earth is larger than the Moon – you could fit almost 4 Moons lined up across the Earth
Earth is tilted about 23 degrees.
Earth rotates(spins) on its axis – one full rotation = 24 hours (1 day)
Earth revolves around the Sun – one full revolution = days (1 year)

7. The Moon The Moon orbits the Earth.
It takes about a month (27.3 days) for the Moon to orbit (go around) the Earth .