This planet is the "3'rd rock from the sun". It has a large amount of water on its surface and is the only planet that currently has conditions which sustain life as we know it.
What is Earth?
100
These are dark areas on the sun's surface.
What are sunspots?
100
These are human made objects which have been sent into orbit around Earth to relay communications, take pictures, and perform other tasks.
What are satellites?
100
These are large bodies that orbit the sun!
What are planets?
100
This is a non-contact force that acts on objects. If two objects are placed in space, they will be drawn towards each other by this force.
What is gravity?
200
Small and recently re-classified as a dwarf planet, this is the littlest planet found furthest out in our solar system.
What is Pluto?
200
The sun, and all bodies that orbit around it form this.
What is the solar system?
200
This fortress orbiting the earth is where many astronauts and researchers live. It was built by the efforts combined by many countries around the world and often has space shuttles dock with it to drop off supplies and exchange crew members.
What is the International Space Station?
200
This is a HUGE system of gas, dust, and stars. Our solar system is found at one of the far edges of it.
What is the Milky Way Galaxy?
200
This is a small, orbiting body made up of dust, ice, and frozen gases. The solid center of this is its nucleus, and like all objects in the solar system it orbits the sun.
What is a comet?
300
This is the largest planet in the solar system.
What is Jupiter?
300
All objects in the solar system travel around the sun in this kind of orbit that is not circular, but more oval shaped.
What is elliptical orbit?
300
This giant mechanism orbits the earth and can see things and places very far away in space. It also takes pictures which are sent back to Earth for scientists to research.
What is the Hubble Space Telescope?
300
This is a chunk of matter that enters our atmosphere and is heated by friction with the air to the point of burning up as it falls towards the Earth.
What is a meteor?
300
In this process, the nuclei of atoms fuse together to form a larger nucleus.
What is nuclear fusion?
400
This is known as the red planet, and has shown evidence that it may have had microscopic life on it long ago.
What is Mars?
400
This is the innermost part of the sun where it's energy is generated.
What is the core?
400
How many rovers are currently exploring and observing the surface of Mars?
What are two . . . the Spirit and Opportunity?
400
This is the last stage of a stars life.
What is a black dwarf star?
400
This is a large rotating cloud of dust and hydrogen gas.
What is a nebula?
500
This is the 8th planet from the Sun, and is made of mostly hyrdrogen, helium, and methane gas.
What is Neptune?
500
The sun's rays strike Earth most directly along here.
What is the equator?
500
Approx how many satellites are orbiting the Earth right now?
What is 1100?
500
This is the term used to describe a star that has stabalized.
What is a main-sequence star?
500
This planet takes 163 Earth years (365 days = 1 Earth year) to orbit around the sun once!