1. Astronomy Vocabulary
Fall 2010
Oak Ridge Elementary

2. Rotation
I was rotating on my chair in
class.
Turning around,
or spinning, on
an axis, or center
point.
From Tricky’s Photostream on Flickr

3. Solar System
The Earth is part of our solar
system.
The Earth, Moon,
other planets and
objects, that
circle around our
Sun.
From This is Yu’s Photostream on Flickr

4. Orbit
The planets orbit around the
sun.
When a planet or
moon circles
around another
body, like the
sun.
From imageeditor’s Photostream on Flickr

5. Revolution
For every year the Earth
makes one revolution around
the Sun.
Each time a
planet or moon
completes an
orbit around
something.

6. heliocentric
Galileo believed in
heliocentrism.
The astronomical
theory that the
Earth and planets
revolve around
the Sun and that
the Sun is
stationary and at
the center of the
universe.

7. Vocabulary Week One
• Rotation: Turning around, or spinning, on an axis,
or center point.
• Solar System: The Earth, Moon, other planets and
objects, that circle around our Sun.
• Orbit: When a planet or moon circles around
another body, like the sun.
• Revolution: Each time a planet or moon completes
an orbit around something.
• Heliocentric: The astronomical theory that the
Earth and planets revolve around the Sun and that
the Sun is stationary and at the center of the
universe.