The furthest four planets are called the _______ planets.

Jupiter, Saturn, Uranus, and Neptune are know as ________ planets.

The gaseous planets are much larger than the rocky planets.

___________ are similar to planets but are not large enough to have cleared their orbital region of other objects.

___________ are objects made of ice, dust, and rocks that orbit the Sun.

The _________ is a region between the planets Mars and Jupiter containing thousands of rocky objects that orbit the Sun.

The ___________ is a region of thousands of small bodies that exists outside the orbit of the planets. Objects in this area consist of "ices" such as ammonia, water, and methane.

The _______ exists much further out than the Kuiper belt and is at the very edge of the Solar System. Scientists believe it is made up of thousands of small ice objects.

Our solar system is part of a bigger grouping of stars called the ___________ galaxy.

___________ was once considered a full planet but was redefined as a dwarf planet in 2006.

About 99.85% of the mass of the solar system is the __________.

Scientists who study the solar system and outer space are called ______________.

Scientists estimate that there are around ________ stars in our galaxy.

The inner and outer planets are separated by the __________.

Each planet orbits or ______ around the Sun.

All rotation and revolution lengths are the same for each planet.