A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

I

Image Intensifier:

A device capable of increasing light from a faint source so that it might be more easily detected.

Inflation:

The theory that the space expanded very rapidly soon after the Big Bang.

Infrared:

Radiation, which has longer wavelengths and lower frequencies and energies than evident light.

Intensity:

The amount, degree, or the quantity of energy transitory through a point per unit time

Interstellar Space:

The dim regions of space located among the stars