Astrophysics Quizzes: Explore the Universe's Mysteries

Question 1

What is the primary energy source for stars?

Accepted Answer

Nuclear fusion

Answer

Chemical reaction

Answer

Gravitational contraction

Answer

Solar radiation

Question 2

Which of the following is the largest type of galaxy?

Accepted Answer

Elliptical galaxy

Answer

Spiral galaxy

Answer

Irregular galaxy

Answer

Dwarf galaxy

Question 3

What is the name of the cosmological model that describes the expanding universe?

Accepted Answer

Big Bang Theory

Answer

Steady State Theory

Answer

Cyclic Theory

Answer

Multiverse Theory

Question 4

Which of the following is a method used to measure the distance to stars?

Accepted Answer

Parallax method

Answer

Redshift measurement

Answer

Doppler effect

Answer

Photometry

Question 5

What is the main constituent of interstellar gas?

Accepted Answer

Hydrogen

Answer

Helium

Answer

Oxygen

Answer

Nitrogen

Question 6

What is the relationship between the luminosity and temperature of a star?

Accepted Answer

Luminosity is directly proportional to the fourth power of temperature

Answer

Luminosity is inversely proportional to temperature

Answer

Luminosity is independent of temperature

Answer

Luminosity is inversely proportional to the square of temperature

Question 7

What is the name of the hypothetical particle thought to be responsible for the dark matter in the universe?

Accepted Answer

Axion

Answer

Neutrino

Answer

Photon

Answer

Graviton

Question 8

Which process generates energy within stars?

Accepted Answer

Nuclear fusion

Answer

Gravitational contraction

Answer

Chemical explosions

Answer

Electromagnetic reactions

Question 9

What method is used to measure the distance to nearby stars?

Accepted Answer

Parallax method

Answer

Doppler shift

Answer

Spectroscopy

Answer

Gravitational lensing

Question 10

Which hypothetical force is believed to contribute to the accelerated expansion of the universe?

Accepted Answer

Dark energy

Answer

Dark matter

Answer

Higgs field

Answer

Neutrino interactions

Question 11

From which celestial object do new stars form?

Accepted Answer

Nebula

Answer

Protostar

Answer

Interstellar medium

Answer

Galaxy cluster

Question 12

Which characteristic is unique to white dwarf stars?

Accepted Answer

Extremely high density

Answer

Very low surface temperature

Answer

Rapid rotation speed

Answer

Strong magnetic field

Question 13

What is the name of the largest known structure in the observable universe?

Accepted Answer

Sloan Great Wall

Answer

Coma Supercluster

Answer

Great Attractor

Answer

Virgo Supercluster

Question 14

The Hertzsprung-Russell diagram displays the relationship between a star's:

Accepted Answer

Temperature and luminosity

Answer

Mass and radius

Answer

Age and metallicity

Answer

Magnetic field and rotation rate

Question 15

Which of the following is NOT a recognized type of galaxy?

Accepted Answer

Quasar

Answer

Elliptical

Answer

Spiral

Answer

Globular

Question 16

The expansion of the universe is currently believed to be:

Accepted Answer

Accelerating

Answer

Decelerating

Answer

Constant

Answer

Oscillating

Question 17

Who is credited with developing the General Theory of Relativity?

Accepted Answer

Albert Einstein

Answer

Isaac Newton

Answer

Marie Curie

Answer

Charles Darwin

Question 18

The cosmic microwave background radiation provides evidence for:

Accepted Answer

The Big Bang theory

Answer

The Redshift theory

Answer

The String theory

Answer

The Inflationary theory

Question 19

The Schwarzschild radius of a black hole is defined as:

Accepted Answer

The radius at which the escape velocity equals the speed of light

Answer

The radius at which the gravitational field is infinite

Answer

The radius at which the density is zero

Answer

The radius at which the temperature is highest

Question 20

Which of the following is NOT a characteristic of pulsars?

Accepted Answer

Existence in binary systems

Answer

Rapid rotation

Answer

Emission of radio waves

Answer

Formation from the remnants of massive stars

Question 21

The discovery of gravitational waves confirmed the existence of:

Accepted Answer

Black holes

Answer

Dark matter

Answer

Neutrinos

Answer

Cosmic strings

Question 22

Which of the following nuclear fusion reactions does NOT occur in stars?

Accepted Answer

Electron capture

Answer

Proton-proton chain reaction

Answer

Carbon-nitrogen-oxygen cycle

Answer

Triple-alpha process

Question 23

What is the name of the supermassive black hole at the center of our galaxy?

Accepted Answer

Sagittarius A*

Answer

Cygnus X-1

Answer

M87*

Answer

Ton 618

Question 24

According to the Big Bang theory, what is the approximate age of the universe?

Accepted Answer

13.8 billion years

Answer

10 billion years

Answer

17 billion years

Answer

20 billion years

Question 25

What is the hypothetical elementary particle believed to be responsible for dark matter called?

Accepted Answer

WIMP

Answer

Higgs boson

Answer

Neutrino

Answer

Graviton

Question 26

What is the name of the law that describes the relationship between the luminosity and effective temperature of a star?

Accepted Answer

Stefan-Boltzmann law

Answer

Wien's displacement law

Answer

Kirchhoff's law

Answer

Planck's law

Question 27

Which of the following correctly describes the order of stellar evolution for a low-mass star similar to our Sun?

Accepted Answer

Main sequence -> Red giant -> White dwarf

Answer

Main sequence -> White dwarf -> Red giant

Answer

Red giant -> Main sequence -> White dwarf

Answer

White dwarf -> Main sequence -> Red giant

Question 28

What is the primary energy source that powers stars?

Accepted Answer

Nuclear fusion

Answer

Nuclear fission

Answer

Chemical reactions

Answer

Gravitational collapse

Question 29

Which type of galaxy is characterized by its irregular shape and lacks a well-defined structure?

Accepted Answer

Irregular galaxy

Answer

Elliptical galaxy

Answer

Spiral galaxy

Answer

Lenticular galaxy

Question 30

Which property is characteristic of a black hole?

Accepted Answer

It possesses an event horizon beyond which nothing can escape.

Answer

It is a region of space with infinite density.

Answer

It emits significant amounts of visible light.

Answer

It can be directly observed with telescopes.

Question 31

What instrument is employed to measure the distance to celestial objects by measuring the time it takes for light to travel to and from them?

Accepted Answer

Laser rangefinder

Answer

Astronomical interferometer

Answer

Spectrograph

Answer

Radio telescope

Question 32

According to current cosmological models, what is the approximate age of the universe?

Accepted Answer

13.8 billion years

Answer

10 billion years

Answer

16 billion years

Answer

20 billion years

Question 33

Which of the following is a defining characteristic of a supernova?

Accepted Answer

A sudden and extremely bright explosion of a massive star

Answer

A gradual dimming of a star over several years

Answer

Rapid rotation of a neutron star

Answer

Formation of a black hole

Question 34

Which fundamental force is responsible for holding atoms together?

Accepted Answer

Strong nuclear force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Weak nuclear force

Question 35

What is the main source of energy that powers stars?

Accepted Answer

Nuclear fusion reactions

Answer

Gravitational collapse

Answer

Chemical reactions

Answer

Electromagnetic radiation

Question 36

The Hertzsprung-Russell diagram is a scatter plot that classifies stars primarily based on which properties?

Accepted Answer

Luminosity and surface temperature

Answer

Mass and chemical composition

Answer

Size and distance from Earth

Answer

Age and rotation period

Question 37

During which stage in a star's life cycle do the heaviest elements get synthesized?

Accepted Answer

Supernova explosion

Answer

Red giant phase

Answer

Main sequence phase

Answer

White dwarf phase

Question 38

According to current cosmological models, what is the estimated age of the universe?

Accepted Answer

Approximately 13.8 billion years

Answer

Approximately 10 billion years

Answer

Approximately 20 billion years

Answer

Approximately 25 billion years

Question 39

Which property is a defining characteristic of dark matter?

Accepted Answer

Interacts only through gravity

Answer

Emits detectable electromagnetic radiation

Answer

Composed primarily of protons and neutrons

Answer

Has a negative gravitational mass

Question 40

Which theory proposes that the universe originated from a singularity and has been expanding ever since?

Accepted Answer

Big Bang Theory

Answer

Steady State Theory

Answer

Cyclic Cosmology Theory

Answer

Multiverse Theory

Question 41

Which of the following is NOT a commonly used method for studying astrophysical objects?

Accepted Answer

Microscopic analysis

Answer

Optical telescopes

Answer

Radio telescopes

Answer

Space probes

Question 42

Which of these is NOT a primary characteristic used to classify stars?

Accepted Answer

Age

Answer

Surface temperature

Answer

Luminosity

Answer

Mass

Question 43

What is the name of the process by which galaxies merge and combine over time?

Accepted Answer

Galactic merger

Answer

Galactic accretion

Answer

Galactic cannibalism

Answer

Galactic fusion

Question 44

Which of the following is NOT a recognized type of galaxy?

Accepted Answer

Planetary nebula

Answer

Elliptical galaxy

Answer

Spiral galaxy

Answer

Lenticular galaxy

Question 45

What is the name of the cosmic background radiation that is believed to be a remnant of the Big Bang?

Accepted Answer

Cosmic microwave background radiation

Answer

Cosmic infrared background radiation

Answer

Cosmic X-ray background radiation

Answer

Cosmic gamma-ray background radiation

Question 46

Which of the following is a measure of the rate at which the universe is expanding?

Accepted Answer

Hubble constant

Answer

Luminosity distance

Answer

Parallax

Answer

Redshift

Question 47

Which of the following telescopes is specifically designed to study the early universe and its formation?

Accepted Answer

James Webb Space Telescope

Answer

Hubble Space Telescope

Answer

Very Large Telescope

Answer

Spitzer Space Telescope

Question 48

Which of the following is NOT a spectral class used to classify stars?

Accepted Answer

Q

Answer

O

Answer

B

Answer

F

Question 49

What is the main source of energy production in stars?

Accepted Answer

Nuclear fusion

Answer

Gravitational contraction

Answer

Chemical reactions

Answer

Radiant heat

Question 50

Which of the following is the largest-known structure in the observable universe?

Accepted Answer

Galaxy supercluster

Answer

Supernova remnant

Answer

Globular cluster

Answer

Cosmic microwave background

Question 51

What force is responsible for the orbital motion of stars around the center of a galaxy?

Accepted Answer

Gravity

Answer

Electromagnetism

Answer

Nuclear force

Answer

Strong force

Question 52

What hypothetical object is associated with the gravitational anomalies observed in the outer regions of galaxies?

Accepted Answer

Black hole

Answer

Neutron star

Answer

White dwarf

Answer

Supernova

Question 53

Which type of galaxy is characterized by an elliptical shape and lacks spiral arms?

Accepted Answer

Elliptical galaxy

Answer

Spiral galaxy

Answer

Irregular galaxy

Answer

Lenticular galaxy

Question 54

The hypothetical point at the center of a galaxy with immense gravitational pull is known as a/an:

Accepted Answer

Black hole

Answer

Supernova

Answer

Neutron star

Answer

White dwarf

Question 55

Which of the following processes does NOT contribute to star formation?

Accepted Answer

Collision of two black holes

Answer

Gravitational collapse of a gas and dust cloud

Answer

Nuclear fusion within a star's core

Answer

Supernova explosion

Question 56

Wien's displacement law states that:

Accepted Answer

The wavelength of emitted light is inversely proportional to the square of the object's temperature

Answer

The intensity of emitted light is directly proportional to the object's temperature

Answer

The frequency of emitted light is directly proportional to the object's temperature

Answer

The energy of emitted light is inversely proportional to the object's temperature

Question 57

A key piece of evidence supporting the Big Bang theory is:

Accepted Answer

Cosmic microwave background radiation

Answer

Abundance of heavy elements

Answer

Blue shift of distant galaxies

Answer

Gravitational lensing

Question 58

The mission that launched the first telescope to orbit the Sun-Earth L2 Lagrange point is the:

Accepted Answer

James Webb Space Telescope

Answer

Hubble Space Telescope

Answer

Spitzer Space Telescope

Answer

Chandra X-ray Observatory

Question 59

Which type of galaxy is characterized by its bright central region and distinct spiral arms?

Accepted Answer

Spiral galaxy

Answer

Elliptical galaxy

Answer

Irregular galaxy

Answer

Lenticular galaxy

Question 60

Which of the following is NOT a part of the electromagnetic radiation spectrum?

Accepted Answer

Sound waves

Answer

X-rays

Answer

Microwaves

Answer

Gamma rays

Question 61

The Hertzsprung-Russell diagram primarily plots:

Accepted Answer

The luminosity and surface temperature of stars

Answer

The mass and radius of stars

Answer

The age and chemical composition of stars

Answer

The surface gravity and rotation rate of stars

Question 62

Which of the following methods is commonly used to determine the distance to stars?

Accepted Answer

Parallax

Answer

Doppler shift

Answer

Photometry

Answer

Spectroscopy

Question 63

The cosmic microwave background radiation is a remnant of:

Accepted Answer

The Big Bang

Answer

The formation of the first galaxies

Answer

The death of massive stars

Answer

The expansion of the universe

Question 64

Which of the following is NOT a hypothetical particle candidate for dark matter?

Accepted Answer

Protons

Answer

Axions

Answer

WIMPs

Answer

Neutrinos