Star Birth
What temperature does a nebula have to reach to become a star?
10 million degrees Fahrenheit
What surface temperature are yellow stars? Name one.
5,500 degrees and the Sun
What sequence are giants on?
Main sequence
Why do stars twinkle?
The movement of air (sometimes called turbulence) in the atmosphere of Earth causes the starlight to get slightly bent as it travels from the distant star through the atmosphere down to us on the ground
What happens when the sun burns all of its hydrogen fuel?
It expands to become a red giant
What does the radius of a giant star range from?
10-100
When were stars first charted?
Ancient Egyptian astronomy charted stars 134 B.C.
Main elements that make up our stars.
hydrogen and helium.
What diagram is used to plot a star?
Hertzsprung Russel Diagram
What does Super giant star mean?
A luminous star whose diameter is more than 100 times that of the sun,
Which color giant is bigger?
Blue
How hot is a black dwarf?
A black dwarf is when a white dwarf lost all it's energy. Therefore the energy would be zero and the temperature would be the same as space,
What happens to a supernova star after it dies?
A neutron star or a black hole forms surrounded by an expanding cloud of hot gas.
What is the temperature of a super giant star?
3,500-4,500 K
What giants are cool?
red giants
What is the hottest star in the universe?
Eta Carinae
why do we see different constellations at different times of the year
Constellations move to the west because of earths orbit around the sun.
What happens to a star after it explodes?
The elements made inside a super giant scatter out into space and eventually form new stars and planets.
how long does a supergiant star’s life last?
10 million years.
how long does a giant star’s life last?
10 billion years.
What is a famous star besides the sun?
Alpha Centauri