Stars
Hot, glowing sphere of gas that produces energy by fusion
What is a star?
First to identify sunspots
Who is Galileo?
Three major types of galaxies
What is elliptical, irregular, and spiral?
Large cloud of gas and dust
What is the nebula?
Amount of light received on Earth form the star.
What is apparent brightness?
Predicts movement of sunspots
What is a 11-year cycle ?
Most common type of galaxy
What is elliptical galaxy?
The outer portion of the star explodes into
What is the supernova
Hottest color of stars
What is bluish white?
Solar flares interacting with Earth's magnetic field
What are the Northern lights?
Scientist noticed a red shift in light from galaxies beyond local group in 1924
Who is Edwin Hubble?
As the gravitational force pulls a star closer, this happens
What is temperature increases?
kilometers per second light travels
What are 300,000 kilometers?
Source of much of the light we see on Earth
What is photosphere?
our galaxy contains approximately this many stars
What is 200 billion?
Year the White Dwarf was first observed
What is 1915?
Relationship among stars color, temperature, and brightness
What is Hertzsprung-Russell diagram?
Gradual boundary between the sun and space
What is the corona?
From Earth, the Milky Way appears as this rather than a spiral shape
What is a faint band of light across the sky?
Average radius of neutron star
What is 15 kilometers?