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Stars and Galaxies : Space
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Practice Test
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Question 1 of 31
What is the closest star to Earth after the Sun?
Choose 1 answer
Proxima Centauri
Alpha Centauri
Sirius
Betelgeuse
Question 2 of 31
Which galaxy is closest to the Milky Way?
Choose 1 answer
Andromeda Galaxy
Triangulum Galaxy
Magellanic Clouds
Whirlpool Galaxy
Question 3 of 31
What type of galaxy is the Milky Way?
Choose 1 answer
Elliptical
Spiral
Irregular
Lenticular
Question 4 of 31
What is a supernova?
Choose 1 answer
A newly born star
A planet orbiting a star
An explosion of a dying star
A galaxy merging event
Question 5 of 31
Which of the following is the brightest star in the night sky?
Choose 1 answer
Sirius
Betelgeuse
Vega
Rigel
Question 6 of 31
What is the name of our galaxy?
Choose 1 answer
Andromeda
Milky Way
Sombrero
Pinwheel
Question 7 of 31
What are stars primarily made of?
Choose 1 answer
Iron and nickel
Oxygen and carbon
Hydrogen and helium
Nitrogen and carbon dioxide
Question 8 of 31
What is the largest type of star by volume?
Choose 1 answer
Red Dwarf
Neutron Star
Supergiant
White Dwarf
Question 9 of 31
Which galaxy is expected to collide with the Milky Way in the distant future?
Choose 1 answer
Triangulum Galaxy
Whirlpool Galaxy
Sombrero Galaxy
Andromeda Galaxy
Question 10 of 31
What is a black hole?
Choose 1 answer
A type of star
A region of space with no gravity
A region of space with extreme gravitational pull
A collapsed galaxy
Question 11 of 31
Which star is known as the North Star?
Choose 1 answer
Betelgeuse
Sirius
Polaris
Rigel
Question 12 of 31
What is the name of the process that powers stars?
Choose 1 answer
Fission
Fusion
Combustion
Convection
Question 13 of 31
What is the term for a system of two stars orbiting each other?
Choose 1 answer
Double star
Binary star
Tandem star
Twin star
Question 14 of 31
How many stars are estimated to be in the Milky Way galaxy?
Choose 1 answer
100-400 million
100-400 billion
1-10 trillion
1-10 million
Question 15 of 31
What type of galaxy is Andromeda?
Choose 1 answer
Elliptical
Spiral
Irregular
Lenticular
Question 16 of 31
What is the approximate age of the Universe?
Choose 1 answer
4.6 billion years
13.8 billion years
100 million years
500 billion years
Question 17 of 31
Which of these is the largest type of galaxy?
Choose 1 answer
Elliptical
Spiral
Irregular
Dwarf
Question 18 of 31
What is a nebula?
Choose 1 answer
A distant star
A planet-sized asteroid
A cloud of gas and dust
A black hole
Question 19 of 31
What is the name of the galaxy cluster that contains the Milky Way?
Choose 1 answer
Virgo Cluster
Hercules Cluster
Local Group
Coma Cluster
Question 20 of 31
What is the fate of stars with a mass less than 8 times that of the Sun?
Choose 1 answer
They become supernovas
They collapse into black holes
They become white dwarfs
They form neutron stars
Question 21 of 31
What type of galaxy is the Milky Way classified as?
Choose 1 answer
Spiral
Elliptical
Irregular
Dwarf
Question 22 of 31
What is the main sequence in the Hertzsprung-Russell diagram?
Choose 1 answer
A line of stars of varying colors
A line of stars with increasing brightness
A line of stars with increasing temperature
A line of star clusters
Question 23 of 31
What is the name of the boundary around a black hole beyond which no light can escape?
Choose 1 answer
Event Horizon
Singularity
Photon Sphere
Accretion Disk
Question 24 of 31
Which galaxy is the most massive in the Local Group?
Choose 1 answer
Andromeda Galaxy
Milky Way
Triangulum Galaxy
Messier 87
Question 25 of 31
What is the primary method used to detect exoplanets around distant stars?
Choose 1 answer
Direct imaging
Doppler shift
Gravitational lensing
Pulsar timing
Question 26 of 31
Which type of galaxy contains very few young stars and is often very dim?
Choose 1 answer
Elliptical Galaxy
Spiral Galaxy
Irregular Galaxy
Dwarf Galaxy
Question 27 of 31
What is the primary source of energy for a main-sequence star like the Sun?
Choose 1 answer
Gravitational collapse
Nuclear fusion
Chemical reactions
Tidal forces
Question 28 of 31
What phenomenon occurs when a star’s light is bent around a massive object?
Choose 1 answer
Gravitational lensing
Redshift
Blueshift
Tidal disruption
Question 29 of 31
What is the term for a star that has exploded and left behind a dense core?
Choose 1 answer
Neutron Star
White Dwarf
Black Hole
Red Giant
Question 30 of 31
Which galaxy is known for its bright, prominent spiral arms?
Choose 1 answer
Milky Way
Andromeda
Messier 87
Whirlpool Galaxy
Question 31 of 31
What is the key characteristic of an irregular galaxy?
Choose 1 answer
Defined shape and structure
Lack of regular structure
A central bulge
A high concentration of old stars
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