dust and gas surrounding an active cometís nucleus
very hot outermost layer of a star's atmosphere. Our Sun's corona can only be
seen during a total solar eclipse.
Shift: A shift in an object's spectrum due to a change in the wavelength of
light that occurs when an object is moving toward or away from Earth.
Shaped like an elongated closed curve; egg-like shape
field: The volume over which an object exerts a gravitational pull.
1000 parsecs. A parsec equals 3.26 light years; kiloparsec equals 3, 260 light
The distance light travels in one year. A
light year is 9.5 trillion kilometers
fields: A region of space near a magnetized body where magnetic forces can be
The region of space in which a planetís magnetic field dominates that of the
1000 kilograms. A metric ton equals 2,204 pounds.
Fusion: A process where atoms are joined and tremendous amounts of heat energy
A huge cloud thought to surround our solar system that is home to large
quantities of dust that are frozen and covered with ice.
Area serves as the birthplace of comets.
Faint outer shadow; partial eclipses are seen from within this shadow.
An instrument that separates visible light into its various wavelengths. Each
wavelength corresponds to a specific color in the spectrum.
A band of colors which forms when visible light passes through a prism.
The band ranges in color from violet (shorter wavelength) to red (longer
inner shadow; total eclipses are seen from within this shadow.