Our Star
What is the closest star to Earth?
The sun
Most stars are made of __________ and ___________
hydrogen and helium
Stars with more energy are _________ (brighter / dimmer)
Absorbed wavelengths are shown as ________ lines (dark or light)
dark
2
The sun is the main _______ source in the solar system? Hint: what does the sun give off?
Giants and supergiants are _______ than the sun. (bigger or smaller)
Bigger
What does the energy of a star depend on? ________ and _________
size and temperature
Lights from a star break into a _________
spectrum
The distance between stars in the universe is measured in ________ years
light
The sun is _______ sized
(small, medium, or large)
Medium
White dwarfs, red dwarfs, and neutron stars are _______ than the sun (bigger or smaller)
Smaller
Apparent brightness is ________ (real or what we observe)
What we observe
True or False: Hertzsprung-Russell Diagram uses apparent (observed) brightness
False
In a light year, are we measuring distance or time?
Distance
The sun is made up of mostly... (Hint: 2 things)
Gas and Hydrogen
Starts that are _________ have lower / cooler temperatures (bluer or redder)
redder
Absolute brightness is what we observe
False
To find the distance from Earth to a star, astronomers use __________ (rulers, paraguay, parallax)
Parallax
How quickly in km does light travel?
300,000 km per second
About how old is the sun?
4.6 billion years old
Stars that are _________ have higher / hotter temperatures (bluer or redder)
bluer
What is the name of the teacher that is doing jeopardy with you right now?
Ms. Gould
Spectrographs help us determine which _________ there are in a star
elements
How many light years away from Earth is the sun?
0.000016 light years