Stellar Astrophysics MCQs with Answers

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Stellar Astrophysics Online Quiz

By presenting 3 options to choose from, Stellar Astrophysics Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Stellar Astrophysics Questions and Answers and click over the correct answer.

• Test Name: Stellar Astrophysics MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Stellar Astrophysics

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1 / 40

What is the term for the balance between gravity and pressure in a star?

Hydrostatic equilibrium

Dynamic equilibrium

Thermal equilibrium

2 / 40

What is the name of the region around a black hole beyond which nothing can escape?

Singularity

Accretion disk

Event horizon

3 / 40

What is the primary source of energy for a main-sequence star?

Carbon fusion

Hydrogen fusion

Helium fusion

4 / 40

What is the most abundant element in the Sun?

Hydrogen

Carbon

Helium

5 / 40

What is the closest star to Earth?

Alpha Centauri A

The Sun

Proxima Centauri

6 / 40

What is the spectral type of the hottest stars?

M-type

G-type

O-type

7 / 40

What element do stars primarily produce during their lifetime?

Carbon

Oxygen

Helium

8 / 40

What is the core temperature of the Sun?

5,000 K

1 million K

15 million K

9 / 40

What is the apparent change in position of a star due to Earth's orbit?

Parallax

Doppler effect

Proper motion

10 / 40

What is the typical end state of a low-mass star?

Black hole

White dwarf

Neutron star

11 / 40

What is a binary star system?

Two stars orbiting a common center

A single star with a large planet

A star with a black hole companion

12 / 40

What is a supernova?

The formation of a new star

The collapse of a white dwarf

The explosion of a massive star

13 / 40

What is the fate of our Sun?

It will become a black hole

It will become a white dwarf

It will become a neutron star

14 / 40

Which process powers the Sun?

Chemical combustion

Nuclear fusion

Nuclear fission

15 / 40

What is the main sequence in the Hertzsprung-Russell diagram?

The region of giant stars

The end stage of stellar evolution

Where stars spend most of their lives

16 / 40

What is the process by which heavier elements are formed in stars?

Nucleosynthesis

Fusion

Fission

17 / 40

What is the term for the brightness of a star as seen from Earth?

Luminosity

Absolute magnitude

Apparent magnitude

18 / 40

What is the surface temperature of the Sun?

5,778 K

10,000 K

4,000 K

19 / 40

What is the term for the distance light travels in one year?

Astronomical unit

Parsec

Light year

20 / 40

What is the process by which stars form?

Gravitational collapse of gas clouds

Fusion of asteroids

Collision of stars

21 / 40

What is the closest galaxy to the Milky Way?

Large Magellanic Cloud

Andromeda Galaxy

Triangulum Galaxy

22 / 40

What is the remnant of a supernova?

Red giant

White dwarf

Neutron star or black hole

23 / 40

What is the primary factor that determines a star's color?

Its surface temperature

Its composition

Its size

24 / 40

What is a neutron star?

A type of red giant

A star composed primarily of neutrons

A young, hot star

25 / 40

What is the term for a sudden outburst of energy from the Sun?

Nova

Supernova

Solar flare

26 / 40

What is the primary component of a neutron star?

Protons

Electrons

Neutrons

27 / 40

What kind of object is a quasar?

An extremely bright and distant active galactic nucleus

A young star cluster

A type of neutron star

28 / 40

What is the term for the actual brightness of a star?

Absolute magnitude

Luminosity

Apparent magnitude

29 / 40

What is a white dwarf?

A star in the main sequence

A type of neutron star

A small, dense star remnant

30 / 40

What phenomenon causes a star to twinkle?

Gravitational waves

Atmospheric turbulence

Magnetic fields

31 / 40

What is a pulsar?

A young, hot star

A dying red giant

A rotating neutron star emitting beams of radiation

32 / 40

What is the Hertzsprung-Russell diagram used for?

Determining star compositions

Classifying stars based on their luminosity and temperature

Measuring distances to stars

33 / 40

What type of star is the Sun?

Blue giant

G-type main-sequence star (G dwarf)

Red dwarf

34 / 40

What type of galaxy is the Milky Way?

Elliptical

Spiral

Irregular

35 / 40

What is a black hole?

A collapsed white dwarf

A large, dark star

A region of space where gravity is so strong that nothing can escape

36 / 40

What is the Chandrasekhar limit?

The maximum mass of a stable white dwarf

The minimum mass of a star

The mass of the Sun

37 / 40

What is the main sequence lifetime of a star like the Sun?

Approximately 100 billion years

Approximately 10 billion years

Approximately 1 billion years

38 / 40

What is a red giant?

A young, hot star

An aging star in the later stage of its life

A newly formed star

39 / 40

Which spectral class is the hottest?

M

B

O

40 / 40

What determines the lifespan of a star?

Its temperature

Its mass

Its composition

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