Stars
The Life Cycle of Stars
Galaxies
Formation of the Universe
Unit 2 Mystery
100
10 Lacertae is above 30,000 degrees Celsius, it is this color
What is blue?
100
The process by which hydrogen changes to helium
What is nuclear fusion?
100
The three shapes of the galaxies
What are spiral, irregular, and elliptical?
100
The study of the origin, structure, and future of the universe
What is cosmology?
100
The majority of stars in our galaxy
What are main sequence stars?
200
The color of the sun, an average main sequence star
What is yellow?
200
All stars begin their lives in this
What is the stellar nursery?
200
Galaxies are classified by this
What is their shape?
200
About how long ago the universe began
What is 13.7-14 billion years ago?
200
Galaxy with a bulge at the center and arms
What is a spiral galaxy?
300
The brightness of a star as seen from Earth
What is apparent magnitude?
300
A star spends most of its lifetime here
What is main sequence?
300
A galaxy with a bright center and very little gas and dust
What is an elliptical galaxy?
300
Theory that states the origins of the universe
What is the big bang theory?
300
Used to measure the distance between objects in space
What is parallax?
400
An apparent shift in the position of an object when viewed from different locations
What is parallax?
400
The Hertzsprung-Russell Diagram shows the relationship between ___ and _____.
What is absolute magnitude/luminosity and surface temperature?
400
A tight group of stars that looks like a ball and contains up to 1 million stars
What is a globular cluster?
400
Leftover radiation from the big bang
What is cosmic background radiation?
400
Many of these galaxies are close companions of large spiral galaxies
What are irregular galaxies?
500
The measured brightness of a stars is known as absolute magnitude and is measured at a distance of ____
What is 32.6 light years away?
500
Astronomers detect the presence of this by using x-rays.
What is a black hole?
500
The Latin word for cloud
What is nebula?
500
A way to estimate the age of the universe
What is measure the distance from Earth to various galaxies OR calculate the ages of old, nearby stars
500
The theory of what may happen if the universe runs out of cosmic background radiation
What is the Big Crunch?
M
e
n
u