Nebulae
• A nebula is a cloud of dust, gas and plasma.
• The material clumps together to form larger masses that eventually are big enough to form a protostar.
• This is the first stage in the star life cycle.
• Nebulae often create star-forming regions, such as the Eagle Nebula.
Brown Dwarf• have a size between that of a giant planet like
Jupiter and that of a small star• any object 15 to 75 times the mass of Jupiter • called "failed stars"• all are parts of a binary system. (two stars orbit
around one another)• possible that brown dwarfs represent a lot of the
mass in the universe
Red Giant
• When a middle aged star begins to die, the temperature near the center rises.
• The star expands.• This will happen to
our sun in about 5 billion years.
• Once the red giant runs out of energy, it collapses and becomes a white dwarf, a small and dense star.
• A white dwarf is the center of the original star. It is very hot and cools down over the next billion years.
Black Dwarf – a white dwarf that has cooled, lost its energy and no longer gives off light. It is a black object in space.
Supergiant Stars are more luminous than giant stars and more than 100 times the diameter of our sun. They are
relatively cool stars.Betelgeuse is a supergiant star.
Supernova – collapse of the center of a red giant star produces a shock wave that blasts the star’s outer layers into space
Black Hole
• An object with so much gravity and that is so dense, light cannot escape
• Most massive stars become black holes when they die
• Quasars are galaxies with black holes at their center. The Milky Way Galaxy is a quasar!
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