Lifespan of a Star
Bigger Stars burn:
Hotter, brighter, and faster
Which elements are present in young stars?
Helium and Hydrogen
Which two variables are compared on the hertsprung russel diagram?
Temperature and brightness
How long ago was the Big bang?
13.8 B years ago
The Sun
Red supergiants come from
Massive stars
What is the highest stable element stars can make through nuclear fusion.
Iron
Where are approximately 90% of stars located?
The Main Sequence
What was the leading theory before the Big Bang Theory
Steady State Theory
Which color stars are the hottest?
Blue
A Neutron Star
Where do elements after iron come from?
Supernovas
Which stars are the brightest cold stars?
Red Supergiants
What are 2 of the 3 main pieces of evidence supporting the big bang?
Red Shift, Expansion of the Universe, and Cosmic Background Radiation.
The things that make a star brighter are
size and temperature
Where are stars formed?
Nebulas/Solar Nebulas
Which fusion produces more energy, Hydrogen or Helium?
Hydrogen
Which stars have the highest temperature and give off the most light?
Blue Giants / Top left corner
What is the cause of the red shift seen throughout the universe?
Stretching of the universe through expansion.
Bigger stars age faster, older stars have more elements
What is the ending to a smaller star?
White Dwarf ---> Black Dwarf
WHERE DO ELEMENTS AFTER IRON COME FROM?
SUPERNOVAS
Where could a "dead star" be located on the HR diagram?
Lower-Left/White Dwarfs
What is cosmic background radiation?
Leftover energy from the big bang.
Where does fusion take place in the star?
The core