This theory states the universe started as a hot, dense state then expanded in all directions.
What is... Big Bang Theory
Moving away means... (redshift/blueshift)
What is... redshift
This process combines 2 atoms to make 1.
What is... nuclear fusion
Most stars spend their entire lives in this stage
What is... Main Sequence
The x-axis on an H-R Diagram is what?
What is... Temperature/Color
How old is the universe said to be?
What is... 13.8 billion years old
Moving towards means... (redshift/blueshift)
What is... blueshift
What is the formula for nuclear fusion?
What is... Hydrogen + Hydrogen = Helium + Energy
What does a star run out of when it moves on to the Red Giant stage?
What is... Hydrogen?
they y-axis on an H-R Diagram is what?
What is... Luminosity
[Daily Double] What law states that when objects are farther away in space they are moving faster?
What is... Hubble's Law
When something is moving away its spectrum will shift to what side?
What is... The red side
Where does fusion happen in the star?
What is.. The core
High mass stars go into what stage after the red supergiant?
What is... Supernova
What is... blue
This element makes up 75% of all matter in the universe and was the first created after the universe cooled down enough.
What is... Hydrogen
The leftover radiation from the big bang is called what?
What is... Cosmic Microwave background
All stars start off as what?
What is... A nebula
[Daily Double] What element can high mass stars fuse up to?
What is... Iron
Where are the hottest/brightest stars located on an H-R Diuagram?
What is... the top
This method of astronomy allows us to see what Stars are made of and what direction they are moving relative to us.
What is... Spectroscopy
The very outer layer of the sun that can only be observed during a solar eclipse.
What is... the Corona
Nucear fusion produces energy in the form of these 2 things.
What is... heat and light
Why do low mass stars live longer lives?
What is... they use less fuel/energy
What does the H-R in H-R Diagram stand for.
What is.... Hertzsprung Russell