Galaxies
What type of galaxy has an oval shape appearance?
Elliptical galaxy
True or False: The Sun is one of only a few stars in the Milky Way galaxy.
False, The sun is one among hundreds
A collection of stars, dust, and gas bound together by gravity.
True or False: All stars are the same.
False, Stars vary in size, brightness, and mass.
What is the first stage in the life cycle of a star?
A nebula
What type of galaxy contains a great amount of dust and gas but does not identification shape?
Irregular galaxy
True or False: The Milky Way galaxy is the only galaxy in the universe.
False: Evidence suggests there are 125 billion.
9.46 trillion km is
light year
What process powers stars to go from hydrogen to helium
fusion
What is the stage called when a star is actively fusing hydrogen into helium in its core?
Main sequence
A galaxy with a nucleus of older stars and arms made mainly of dust, gas, and young stars.
Spiral Galaxy
Is the sun at the center of the Milky Way galaxy?
False, Evidence shows that the sun is not at the center of the Milky Way.
A galaxy with no identifiable shape and contains a large amount of dust and gas.
Irregular galaxy
True or False: Stars are made of fire and burn like flames.
False, Stars are composed of hot gases that glow due to nuclear fusion.
What does a star like the sun become after it exhausts its hydrogen fuel?
A red giant
Where is the solar system located within the Milky Way galaxy?
In the spiral arms
True or False: A model of the Milky Way can be used as a tool to show students the vast number of stars in the galaxy.
True
The actual brightness of an object such as a star
luminosity
What does the Hertzsprung-Russell diagram reveal about a star?
The relationship between its temperature and luminosity.
What is the end stage of a massive star that results in a supernova explosion?
Neutron star or black hole
Approximately how many galaxies are in the observable universe?
125 billion
True or False: Is Andromeda a galaxy?
True: It is the closest large spiral galaxy from the Milky Way.
A large celestial body that is composed of gas and emits light
star
What term describes the apparent shift in the position of a star when viewed from different locations?
Parallax
What does a medium-sized star, like the sun, become at the very end of its life cycle?
A white dwarf surrounded by a planetary nebula