Mercury, Venus, Earth and Mars
Jupiter, Saturn , Neptune, Uranus
The only star in our galaxy
Just one of billions of stars that make up our galaxy
The largest planet in our solar system
Technically speaking, one of Earth’s moons
It is the only round planet
It is the only planet with its own moon
It is the only planet that has enough oxygen in its atmosphere to sustain life
It is the only ringed planet
The gases catch fire, making the comet glow
The ice begins to melt, leaving a trail of gases and debris
The comet explodes, which is called a supernova
The comet bounces off the sun’s magnetosphere
A chunk of comet (rock) that survives our atmosphere and falls to Earth
A meteor that hasn't hit Earth yet
A piece of rock that is in orbit around the Earth
A radioactive moon rock
The Milky Way
Without the Earth in orbit, the sun would quickly burn up.
Without the heat and light from the sun, life on Earth will cease.
Without each other, they would both spin out of control
Without the sun to cool things off, the interior of the Earth would burn up the planet
Their orbits are perfectly round
Their orbits are in the shape of a figure eight
At some point of its orbit, a planet is closer to the sun.
Their orbits change direction from time to time.