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 type of star is the Sun?

G-type main-sequence star (G dwarf)

Blue giant

Red dwarf

2 / 40

What is the Chandrasekhar limit?

The minimum mass of a star

The maximum mass of a stable white dwarf

The mass of the Sun

3 / 40

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

Proper motion

Parallax

Doppler effect

4 / 40

What is the Hertzsprung-Russell diagram used for?

Classifying stars based on their luminosity and temperature

Measuring distances to stars

Determining star compositions

5 / 40

Which spectral class is the hottest?

B

O

M

6 / 40

What determines the lifespan of a star?

Its temperature

Its composition

Its mass

7 / 40

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

The end stage of stellar evolution

The region of giant stars

Where stars spend most of their lives

8 / 40

What is the fate of our Sun?

It will become a white dwarf

It will become a neutron star

It will become a black hole

9 / 40

What is the surface temperature of the Sun?

4,000 K

10,000 K

5,778 K

10 / 40

What is the remnant of a supernova?

White dwarf

Neutron star or black hole

Red giant

11 / 40

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

Singularity

Event horizon

Accretion disk

12 / 40

What is the core temperature of the Sun?

5,000 K

1 million K

15 million K

13 / 40

What is a pulsar?

A young, hot star

A dying red giant

A rotating neutron star emitting beams of radiation

14 / 40

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

Apparent magnitude

Luminosity

Absolute magnitude

15 / 40

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

Approximately 10 billion years

Approximately 100 billion years

Approximately 1 billion years

16 / 40

What is a white dwarf?

A star in the main sequence

A small, dense star remnant

A type of neutron star

17 / 40

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

Hydrostatic equilibrium

Thermal equilibrium

Dynamic equilibrium

18 / 40

What is the spectral type of the hottest stars?

M-type

G-type

O-type

19 / 40

What element do stars primarily produce during their lifetime?

Oxygen

Helium

Carbon

20 / 40

What is the closest galaxy to the Milky Way?

Triangulum Galaxy

Andromeda Galaxy

Large Magellanic Cloud

21 / 40

What phenomenon causes a star to twinkle?

Atmospheric turbulence

Magnetic fields

Gravitational waves

22 / 40

What kind of object is a quasar?

A type of neutron star

A young star cluster

An extremely bright and distant active galactic nucleus

23 / 40

What is the primary component of a neutron star?

Neutrons

Electrons

Protons

24 / 40

What is the most abundant element in the Sun?

Hydrogen

Carbon

Helium

25 / 40

What is a supernova?

The formation of a new star

The collapse of a white dwarf

The explosion of a massive star

26 / 40

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

Its size

Its composition

Its surface temperature

27 / 40

What is a binary star system?

A single star with a large planet

A star with a black hole companion

Two stars orbiting a common center

28 / 40

What is the closest star to Earth?

Alpha Centauri A

Proxima Centauri

The Sun

29 / 40

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

Black hole

White dwarf

Neutron star

30 / 40

What is a red giant?

A young, hot star

An aging star in the later stage of its life

A newly formed star

31 / 40

What type of galaxy is the Milky Way?

Spiral

Irregular

Elliptical

32 / 40

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

Solar flare

Nova

Supernova

33 / 40

What is a black hole?

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

A large, dark star

A collapsed white dwarf

34 / 40

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

Hydrogen fusion

Helium fusion

Carbon fusion

35 / 40

What is the process by which stars form?

Fusion of asteroids

Gravitational collapse of gas clouds

Collision of stars

36 / 40

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

Parsec

Astronomical unit

Light year

37 / 40

Which process powers the Sun?

Chemical combustion

Nuclear fission

Nuclear fusion

38 / 40

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

Apparent magnitude

Absolute magnitude

Luminosity

39 / 40

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

Nucleosynthesis

Fusion

Fission

40 / 40

What is a neutron star?

A young, hot star

A star composed primarily of neutrons

A type of red giant

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