A group of stars that form a recognizable pattern in the sky is called a:
a) Galaxy
b) Constellation
c) Nebula
d) Supernova
Answer: b) Constellation
The closest star to Earth is:
a) Proxima Centauri
b) Sirius
c) Alpha Centauri
d) Betelgeuse
Answer: a) Proxima Centauri
The Sun belongs to which galaxy?
a) Andromeda Galaxy
b) Milky Way Galaxy
c) Sombrero Galaxy
d) Whirlpool Galaxy
Answer: b) Milky Way Galaxy
The process by which a star produces energy is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: a) Nuclear fusion
The life cycle of a star is determined by its:
a) Size
b) Temperature
c) Mass
d) Color
Answer: c) Mass
A star that has exhausted its nuclear fuel and collapsed under its own gravity is called a:
a) White dwarf
b) Neutron star
c) Black hole
d) Red giant
Answer: c) Black hole
The brightest and largest type of star is a:
a) White dwarf
b) Neutron star
c) Black hole
d) Supergiant
Answer: d) Supergiant
The process by which a massive star ends its life in a powerful explosion is called a:
a) White dwarf
b) Neutron star
c) Black hole
d) Supernova
Answer: d) Supernova
The remnants of a massive star after a supernova explosion is a:
a) White dwarf
b) Neutron star
c) Black hole
d) Protostar
Answer: b) Neutron star
The distance that light travels in one year is called a:
a) Light-minute
b) Light-hour
c) Light-day
d) Light-year
Answer: d) Light-year
The expansion of the universe and the observed redshift of galaxies led to the discovery of:
a) Black holes
b) Dark matter
c) Dark energy
d) Neutron stars
Answer: c) Dark energy
The force that holds galaxies together is called:
a) Electromagnetic force
b) Strong nuclear force
c) Weak nuclear force
d) Gravity
Answer: d) Gravity
The largest known structure in the universe is a:
a) Galaxy cluster
b) Nebula
c) Supercluster
d) Quasar
Answer: c) Supercluster
The study of celestial objects, their properties, and the physical processes that occur in the universe is called:
a) Astrophysics
b) Cosmology
c) Astronomy
d) Astrology
Answer: c) Astronomy
The theory that explains the origin and evolution of the universe is called the:
a) Big Bang theory
b) Steady-state theory
c) String theory
d) Hubble’s law
Answer: a) Big Bang theory
The phenomenon where light passing through a lens or a prism is bent and separated into its component colors is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: d) Dispersion
The brightness of a star as seen from Earth is called its:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: b) Magnitude
The measure of the total amount of energy radiated by a star per unit time is called its:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: a) Luminosity
The process by which a star collapses under its own gravity and becomes extremely dense is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Gravitational collapse
Answer: d) Gravitational collapse
The most common type of galaxy in the universe is a:
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Barred spiral galaxy
Answer: b) Elliptical galaxy
The distance between two adjacent peaks or troughs of a wave is called its:
a) Wavelength
b) Frequency
c) Amplitude
d) Velocity
Answer: a) Wavelength
The shift in the observed frequency or wavelength of light due to the relative motion between the source and the observer is called:
a) Reflection
b) Refraction
c) Diffraction
d) Doppler effect
Answer: d) Doppler effect
The redshift of galaxies is evidence for the:
a) Expanding universe
b) Steady-state universe
c) Oscillating universe
d) Static universe
Answer: a) Expanding universe
The region around a black hole from which nothing can escape, not even light, is called the:
a) Event horizon
b) Singularity
c) Photon sphere
d) Ergosphere
Answer: a) Event horizon
The theory that suggests the universe is continually expanding and has no beginning or end is called the:
a) Big Bang theory
b) Steady-state theory
c) Oscillating theory
d) Inflationary theory
Answer: b) Steady-state theory
The phenomenon where the path of light is bent as it passes through a medium with a different refractive index is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: b) Refraction
The study of the origin, structure, and evolution of the universe as a whole is called:
a) Astrophysics
b) Cosmology
c) Astronomy
d) Astrology
Answer: b) Cosmology
The measure of the brightness of a star as it appears from a standard distance of 10 parsecs is called its:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: b) Magnitude
The measure of the total amount of energy radiated by a star per unit time is called its:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: a) Luminosity
The process by which a star releases energy by combining light atomic nuclei to form heavier nuclei is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: a) Nuclear fusion
The phenomenon where light waves spread out and bend around obstacles or through openings is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: c) Diffraction
The measure of the total energy passing through a given area per unit time is called:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: c) Flux
The unit used to measure the distance between stars and galaxies is the:
a) Astronomical unit (AU)
b) Light-year (ly)
c) Parsec (pc)
d) Kilometer (km)
Answer: c) Parsec (pc)
The dense core remaining after a supernova explosion is called a:
a) White dwarf
b) Neutron star
c) Black hole
d) Red giant
Answer: b) Neutron star
The process of the contraction of a cloud of gas and dust under its own gravity to form a star is called:
a) Nuclear fusion
b) Stellar evolution
c) Star formation
d) Supernova explosion
Answer: c) Star formation
The type of galaxy that has a flattened disk with spiral arms and a central bulge is a:
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Barred spiral galaxy
Answer: a) Spiral galaxy
The process by which a star transforms into a red giant or a red supergiant is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: c) Stellar evolution
The phenomenon where the wavelength of light increases as the source of light moves away from the observer is called:
a) Reflection
b) Refraction
c) Diffraction
d) Redshift
Answer: d) Redshift
The phenomenon where the wavelength of light decreases as the source of light moves toward the observer is called:
a) Reflection
b) Refraction
c) Diffraction
d) Blueshift
Answer: d) Blueshift
The study of the physical properties, behavior, and composition of celestial objects is called:
a) Astrophysics
b) Cosmology
c) Astronomy
d) Astrology
Answer: a) Astrophysics
The measure of the amount of light received from a celestial object per unit area is called:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: c) Flux
The phenomenon where light waves bounce off a surface and change direction is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: a) Reflection
The region around a black hole from which nothing can escape, not even light, is called the:
a) Event horizon
b) Singularity
c) Photon sphere
d) Ergosphere
Answer: a) Event horizon
The process by which a star releases energy by splitting heavy atomic nuclei into lighter nuclei is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: b) Nuclear fission
The measure of the amount of light emitted by a celestial object is called its:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: a) Luminosity
The type of galaxy that has a round or elliptical shape is a:
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Barred spiral galaxy
Answer: b) Elliptical galaxy
The process by which a star transforms into a white dwarf or a neutron star is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: c) Stellar evolution
The phenomenon where light waves change direction and spread out as they pass through an opening or around an obstacle is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: c) Diffraction
The process by which a star releases energy by combining light atomic nuclei to form heavier nuclei is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: a) Nuclear fusion
The phenomenon where light waves bounce off a surface and change direction is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: a) Reflection
The type of galaxy that has an irregular shape with no distinct structure is an:
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Barred spiral galaxy
Answer: c) Irregular galaxy
The process by which a star transforms into a black hole is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: c) Stellar evolution
The theory that suggests the universe underwent a rapid expansion shortly after the Big Bang is called the:
a) Big Bang theory
b) Steady-state theory
c) Oscillating theory
d) Inflationary theory
Answer: d) Inflationary theory
The measure of the amount of light emitted by a celestial object per unit area is called its:
a) Luminosity
b) Magnitude
c) Flux
d) Spectral type
Answer: c) Flux
The type of galaxy that has a central bar-shaped structure extending from the center is a:
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Barred spiral galaxy
Answer: d) Barred spiral galaxy
The process by which a star releases energy by splitting heavy atomic nuclei into lighter nuclei is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: b) Nuclear fission
The phenomenon where light waves change direction and spread out as they pass through an opening or around an obstacle is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: c) Diffraction
The process by which a star transforms into a white dwarf or a neutron star is called:
a) Nuclear fusion
b) Nuclear fission
c) Stellar evolution
d) Supernova explosion
Answer: c) Stellar evolution
The phenomenon where light waves bounce off a surface and change direction is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: a) Reflection
The type of galaxy that has an irregular shape with no distinct structure is an:
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Barred spiral galaxy
Answer: c) Irregular galaxy
