Sun
Areas of the Sun that are cooler and less bright than surrounding areas.
sunspots
A group of stars that forms a pattern in the sky.
Constellation
Large group of stars gas and dust held together by gravity.
Galaxy
An eruption of gas from the sun's surface that occurs when the loops in sunspot regions suddenly connect.
Solar Flare
The distance light travels in one year, about 9.5 trillion miles.
Light-Year
Largest layer of the Sun's atmosphere.
corona
Measure of the amount of light a star actually gives off.
Absolute Magnitude
Our galaxies name.
Milky way
Coronal gas that is thrown into space from the sun.
Corona Mass Ejection
States that about 12 to 15 billion years ago the universe began with a huge fiery explosion.
Big Bang Theory
Very dense region of the sun in which the atoms are so closely packed that light can take millions of years to pass through.
Radiative Zone
Measure of the amount of light from a star that is received on Earth.
Apparent Magnitude
Galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern.
Spiral galaxy
Lowest layer of the Sun's atmosphere.
Core
Location on the H-R diagram where most stars lie.
Main sequence
A loop of gas that protrudes from the sun's surface, linking parts of sunspot regions.
Solar Prominence
A cloud of gas and dust in outer space that is the birthplace of stars.
Nebula
Galaxy with no regular shape.
Irregular galaxy
Late stage in life of a main sequence star in which its core uses up its helium and its outer layers escape into space leaving behind a hot dense core
White Dwarf
Collapsed core of a supernova that can shrink to about 20km in diameter and contains only neutrons in the dense core
Neutron Star
Layer of the Sun's atmosphere above the photosphere.
Chromosphere
Late stage in the life of a massive star in which the core heats up, heavy elements form by fusion and the star expands.
Supergiant
A galaxy shaped like a flattened ball, containing only old stars.
Elliptical galaxy
Late stage in life of a main sequence star when hydrogen in the core is used up, the core contracts and temperatures inside the star increase causing the outer layer to expand and cool.
Final stage in the evolution of a supernova where the cores mass collapses to a point it has no volume and whose gravity is so strong not even light can escape.
Black Hole