a body in space that orbits the sun, but has not cleared the area around its orbit of other masses or celestial bodies
Although it was previously known as one of the main planets, Pluto has been redefined as a dwarf planet.

the fifth planet from the sun; the largest planet
There is a distinctive red spot on jupiter.

finally
lastly, the speaker came to the topic that most of the audience was interested in.

the planet nearest to the sun
Since Pluto is no longer part of our solar system, mercury is now the smallest planet.

the planet eighth in order from the sun
The planet neptune has 13 known moons.

a very large round object that moves around a sun or around another star
More and more planets have been discovered.

formerly the ninth planet in the solar system
pluto was discovered in 1930.

the sixth planet from the sun; the planet with rings
The rings around saturn are made of small particles.

the planet seventh in order from the sun
uranus is a distant 2871 million km from the sun.

the planet second in order from the sun
The planet venus has no moons.