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Flashcards on Galaxies and Stars
Click on the flashcard to see the answer
What are galaxies?
Galaxies are vast systems of stars, gas, and dust held together by gravity.
What is the Milky Way?
The Milky Way is the galaxy in which our solar system is located.
What is a star?
A star is a luminous sphere of plasma held together by its own gravity.
How are stars formed?
Stars form from the gravitational collapse of gas and dust in space.
What is stellar evolution?
Stellar evolution is the life cycle of a star, from its birth to its death.
What is a supernova?
A supernova is a powerful explosion that occurs at the end of a star's life.
What is a black hole?
A black hole is a region in space where gravity is so strong that nothing, not even light, can escape.
What are exoplanets?
Exoplanets are planets that orbit stars outside of our solar system.
What is the Hertzsprung-Russell diagram?
The Hertzsprung-Russell diagram is a graph that plots the luminosity and temperature of stars.
What is the main sequence in the Hertzsprung-Russell diagram?
The main sequence is a diagonal band in the Hertzsprung-Russell diagram where most stars lie.
What is a galaxy cluster?
A galaxy cluster is a group of galaxies bound together by gravity.
What is the observable universe?
The observable universe is the part of the universe that is visible from Earth.
What is cosmic microwave background radiation?
Cosmic microwave background radiation is the afterglow of the Big Bang.
What is a pulsar?
A pulsar is a highly-magnetized, rotating neutron star that emits beams of electromagnetic radiation.
What is the Andromeda Galaxy?
The Andromeda Galaxy is the closest spiral galaxy to the Milky Way.
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Test Your Knowledge
What are exoplanets?
Planets within our solar system
Planets outside of our solar system
Planets orbiting black holes
Planets with no atmosphere
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What is a black hole?
A region in space where gravity is so strong that nothing can escape
A dying star that explodes
A cluster of galaxies
A type of nebula
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What is a supernova?
A planet with multiple moons
A star that collapses into a white dwarf
A powerful explosion at the end of a star's life
A type of galaxy
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What is the main sequence in the Hertzsprung-Russell diagram?
A type of comet
A diagonal band where most stars lie
A region of space with intense gravitational pull
A stage in stellar evolution
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What is a galaxy cluster?
A group of planets orbiting a star
A collection of galaxies bound together by gravity
A type of dark matter
A region of space with no stars
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What is the observable universe?
A telescope used to observe distant stars
The part of the universe that is visible from Earth
The part of the universe beyond our solar system
A spacecraft that explores distant galaxies
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What is cosmic microwave background radiation?
The radiation emitted by stars
The heat emitted by black holes
The afterglow of the Big Bang
The energy produced by pulsars
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What is a pulsar?
A type of galaxy
A highly-magnetized, rotating neutron star
A planet with extreme weather conditions
A region of space filled with cosmic dust
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What is the Andromeda Galaxy?
The galaxy in which our solar system is located
The closest spiral galaxy to the Milky Way
A galaxy with a supermassive black hole at its center
A small satellite galaxy of the Milky Way
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What is the Milky Way?
A cluster of stars in the constellation Ursa Major
The galaxy in which our solar system is located
A type of star with a milky appearance
A region of space filled with interstellar dust
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