Star Characteristics
Stellar Evolution
Star Groups
Big Bang Theory
Star Characteristics pt. 2
100
A ball of energy that gives off an enormous amount of electromagnetic enrgy.
What is a Star?
100
The graph that astronomers use to plot stars.
What is the H.R. Diagram?
100
Patterns of stars throughout the sky.
What are constellations?
100
The theory that matter and energy in the universe was compressed and then exploded in every direction
What is the Big Bang Theory?
100
The distance that light travels in a year.
What is a Light Year?
200
What astronomers use to direct starlight.
What are Spectrographs?
200
The place that most stars lie on the H.R. Diagram
What is a Main Sequence star?
200
Nebulas that collapse to form grous of hundreds or thousands of stars.
What is a Globular Cluster?
200
The motion that shows the expansion of space.
What is a Red Shift?
200
The apparent shift in the wavelength of light emitted ba a celestial object.
What is the Doppler Effect?
300
A star that always seems bo be visible in the night sky. (Ex: Polaris)
What are Circumpolar stars?
300
A cloud of gas that forms around a dying sinlike star.
What is a Planetary Nebula?
300
Two stars that orbit around each other.
What is a Binary star?
300
Where temperature differs from the background temperature.
What are ripples in space?
300
How an astronomer determines a stars distance.
What is Parallax?
400
emission, absorption, and continuous
What are the three types of spectra?
400
Achieved when the inward force of gravity is balanced by the outward pressure from fusion and radiation inside the star.
What is Stellar Equilibrium?
400
Stars that allow astronomers to find the distances that contain the stars.
What is a Cepheid variable?
400
Low levels of energy evenly distributed throughout the universe.
What is cosmic background radiation?
400
The brightness of a star as it appears on Earth
What is apparent magnitude?
500
Blue, White, Yellow, Orange, Red
What is the order of the stars from hottest to coolest?
500
70% hydrogen, 28% helium, and 2% heavier elements
What elements are Nebula composed of?
500
Objects that are in the middle of galaxies that give off an enormous anount of energy and radiation.
What is a Quasar?
500
14 Billion years
What is the age of the universe?
500
The true brightness of a star.
What is absolute magnitude?
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