Vocabulary Practice fourth grade

An optical instrument for making distant objects appear closer

• observatory

• milky way

• telescope

The light from the sun.

• milky way

• sunlight

• astronomer

A vehicle for travel beyond the Earth’s atmosphere

• spacecraft

• observatory

• disk

A mass of rock that moves around in space.

• Universe

• moon

• Asteroid

Celestial objects that are visible in the night

• milky way

• stars

• galaxy

The amount of space between two things.

• orbit

• surface

• distance

Being the only one of its kind

• disk

• unique

• surface

The inner part, the center of the Earth.

• surface

• outer

• core

To travel around a new place in order to learn about it.

• crater

• orbit

• explore

A straight line that across a circle through the center.

• core

• outer

• diameter