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Life of a Star. Nebula. A cloud of dust and gas in which new stars form. Nebula. Nebula. Star -uses Hydrogen as fuel. Nebula. Star -uses Hydrogen as fuel. Red Giant -uses Helium as fuel. Red giant. - PowerPoint PPT Presentation
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Life of a Star
NebulaA cloud of dust and gas in which
new stars form
Nebula
Nebula
Star -uses Hydrogen as fuel
Nebula
Star-uses Hydrogen as fuel
Red Giant -uses Helium as fuel
Red giantStars that begin to expand as they
use up their fuel
Antares Star in the Scorpio Constellation
Betelgeuse Star in Orion Constellation
Nebula
Star -uses Hydrogen as fuel
Red Giant -uses Helium as fuel
White Dwarf -no fuel
White DwarfWhen helium is used up, the outside
layers of gas float off and only the core will remain
NGC 2440 – one of the hottest white dwarfs
Sirius A – 18,000°F
Sirius B – 44,900°F
Nebula
Star -uses Hydrogen as fuel
Red Giant -uses Helium as fuel
White Dwarf -no fuel
Black Dwarf -thermal energy
cools
Black DwarfWhen a white dwarf completely cools down. This is completely
hypothetical.
Nebula
Star -uses Hydrogen as fuel
Red Giant -uses Helium as fuel
White Dwarf -no fuel
Black Dwarf -thermal energy
cools
Supernova
(binary star system)
Nebula
Star -uses Hydrogen as fuel
Red Giant -uses Helium as fuel
White Dwarf -no fuel
Black Dwarf -thermal energy
cools
Supernova
Supernova
(massive star)
(binary star system)
SupernovaWhen a massive star cools, its core will shrink
until it can’t shrink anymore. The sudden stopping sends out shock waves and a huge
explosion
"After" and "Before" pictures of Supernova 1987AClosest and brightest supernova observed in 400 years
SN1987A, pictures taken in 1994
Picture taken in 2004
Animation of SN1987A Supernova
Cassiopeia A Supernova, youngest supernova in Milky Way Galaxy 1667
Crab Nebula exploded in 1054
Nebula
Star -uses Hydrogen as fuel
Red Giant -uses Helium as fuel
White Dwarf -no fuel
Black Dwarf -thermal energy
cools
Supernova
Supernova
(massive star)
(binary star system)Neutron Star -spins -gives out radio waves
“pulsar”
Neutron StarA leftover ball of neutrons after a
supernova
2,000 year old remnants of RCW 103 Supernova
Crab Nebula is the remnants of a supernova explosion. In the center is a neutron star
Nebula
Star -uses Hydrogen as fuel
Red Giant -uses Helium as fuel
White Dwarf -no fuel
Black Dwarf -thermal energy
cools
Supernova
Supernova
(massive star)
(binary star system)Neutron Star -spins -gives out radio waves
“pulsar”
Black Hole
Black HoleAfter a supernova, the remaining core of the star can
shrink into a black hole.
This is a point in space with such a strong force of gravity that nothing within a certain distance of it can escape
getting pulled in, not even light.
This image taken by the Chandra X-ray Observatory, shows a region at the center of our own Milky Way galaxy that appears to
host a supermassive black hole.
This artist's illustration shows a black hole, together with its whirling disk of matter, hurtling like a cannonball through the disk of our own galaxy.
• http://hubblesite.org/explore_astronomy/black_holes/index.html
The Life Cycle of a Massive Star
