stars and galaxies. the closest star to us the sun
TRANSCRIPT
Stars and Galaxies
The closest star to us
• The sun
A cluster of stars • A galaxy is a cluster of stars together
The universe
• The universe is everything in space
The different types of universes
Stars make up galaxies which make up the universe
The different types of galaxies
• Draw three boxes each with a title and a picture of the galaxy in the box
Spiral Galaxy Irregular GalaxyElliptical Galaxy
What makes one star different from another?
1. Mass determines lifespan of star2. Flame demonstration: predict on left side
order from coolest to hottest.(orange, white, yellow, red, blue)
The color of a star tells its surface temperature
• Remember: ROYWB• A star’s color tells you how hot its surface is.
From coolest to hottest: • Red, orange, yellow, white, blue
Size of stars
A star is born
Nebulas- dust and debris collecting in space
Protostar
• Star is being formed from nebula dust and debris
Star is formed=main sequence
Super nova
• Explosion moving at about 6 million mph!!
OR
White dwarf star Black dwarf star
A star has died
• Neutron Star• If the star is at least 1.5 but
less than 9 times larger than the Sun, the core left after the supernova will collapse into a neutron star. This is a star composed only of neutrons.
• Black Hole• If the star is at least 9 or
more times larger than the Sun, the core will continue to collapse into a black hole, an extremely dense area with a strong gravitational pull that light can not escape.
Neutron Star or Black Hole?
Types of Galaxies – Quasars…
• A quasar is a distant galaxy with a black hole at its center.
• As enormous amounts of gas revolve around a black hole, the gas heats up and shines brightly.
See board
• Diagram of Stars life
Life cycle of a star (no dwarfs here)