The Earth gives out its own light.
The Earth's crust which produces heat and light energy allows itself to be visible in space.
The Earth refracted light from the Sun to the Astronauts' eyes.
The Earth reflected light from the closest star to itself to the Astronauts' eyes.
The Earth reflected light from all the planets to the Astronauts' eyes.
About its own axis sometimes.
About its own axis all the time.
In circles all the time.
In circles sometimes.
About 265 days
About 300 days
About 600 days
About 452 days
About 365 days
A rock that revolves around a star
A tiny object that revolves around a star
A gigantic object that revolves around a star
A rock that rotates around a star
A gigantic object that rotates around a star
Earth's natural satellite
Earth's man-made satellite
Earth's display purposes for night scenery
(i) and (iv) only
(i), (iii) and (iv) only
(ii), (iii) and (iv) only
All of the above
To send information in the form of radio signals to a communication satellite in space
To gather information to all household devices through internet
To make wireless communications
For tourist attractions
To connect a radio station