What is the defining feature of a black hole?
A) Its immense size
B) Its strong magnetic field
C) Its ability to emit radiation
D) Its gravitational pull that prevents even light from escaping
Which type of galaxy has a disk-like structure with spiral arms?
A) Elliptical
B) Irregular
C) Spiral
D) Lenticular
What is the event horizon of a black hole?
A) The boundary beyond which nothing can escape
B) The center of a black hole
C) The bright region surrounding a black hole
D) A cloud of gas around a black hole
Which galaxy is the closest large galaxy to the Milky Way?
A) Andromeda
B) Triangulum
C) Whirlpool
D) Sombrero
What is a nebula?
A) A collapsed star
B) A cloud of gas and dust in space
C) A type of galaxy
D) A small black hole
Which force is responsible for the formation of black holes?
A) Electromagnetic force
B) Nuclear force
C) Gravitational force
D) Weak force
What is the name of the supermassive black hole at the center of the Milky Way?
A) Andromeda A
B) Sagittarius A*
C) Messier 87
D) Cygnus X-1
Which type of galaxy is the Milky Way?
A) Elliptical
B) Spiral
C) Irregular
D) Lenticular
Which telescope captured the first image of a black hole?
A) Hubble Space Telescope
B) Spitzer Space Telescope
C) Event Horizon Telescope
D) Kepler Space Telescope
What is the process by which black holes are formed?
A) Supernova explosion
B) Gravitational collapse
C) Cosmic inflation
D) Stellar fusion
What do astronomers use to detect black holes?
A) Visible light
B) Gravitational waves and X-rays
C) Infrared radiation
D) Gamma-ray bursts
Which type of nebula results from the death of a massive star?
A) Planetary nebula
B) Emission nebula
C) Supernova remnant
D) Reflection nebula
What happens to time near the event horizon of a black hole?
A) It speeds up
B) It stops completely
C) It slows down significantly
D) It remains unchanged
Which galaxy is known as M31?
A) Milky Way
B) Andromeda
C) Triangulum
D) Sombrero
What is the primary component of a nebula?
A) Dark matter
B) Gas and dust
C) Plasma
D) Heavy elements
What is a quasar?
A) A dying star
B) A type of galaxy
C) An extremely bright and active galactic nucleus
D) A planetary nebula
Which galaxy type has no defined shape?
A) Elliptical
B) Spiral
C) Irregular
D) Barred spiral
Which phenomenon allows scientists to detect black holes indirectly?
A) Cosmic microwave background
B) Doppler effect
C) Gravitational lensing
D) Nuclear fusion
Which part of the galaxy contains the most stars?
A) Galactic halo
B) Galactic core
C) Spiral arms
D) Galactic bulge
What causes the bright glow in an emission nebula?
A) Reflected starlight
B) Ionization of gases by radiation from nearby stars
C) Heat from black holes
D) Collisions with asteroids
Which galaxy cluster does the Milky Way belong to?
A) Virgo Cluster
B) Andromeda Cluster
C) Local Group
D) Hercules Cluster
What is the theoretical concept of a wormhole?
A) A type of nebula
B) A passage through space-time
C) A collapsed galaxy
D) A magnetic storm in a black hole
Which type of black hole is the smallest?
A) Supermassive black hole
B) Intermediate black hole
C) Stellar black hole
D) Primordial black hole
What happens when two black holes merge?
A) They create a white dwarf
B) They form a larger black hole and emit gravitational waves
C) They explode into a supernova
D) They disappear
Which nebula is often called the “Pillars of Creation”?
A) Orion Nebula
B) Eagle Nebula
C) Crab Nebula
D) Helix Nebula
Which force prevents a black hole from collapsing further?
A) Nuclear force
B) Gravitational force
C) There is no opposing force
D) Electromagnetic force
What is a white hole?
A) The opposite of a black hole that only expels matter
B) A neutron star
C) A quasar
D) A collapsed galaxy
Which term describes the region around a black hole where matter spirals inward?
A) Accretion disk
B) Event horizon
C) Photon sphere
D) Singularity
Which nebula is the birthplace of new stars?
A) Planetary nebula
B) Reflection nebula
C) Dark nebula
D) Star-forming nebula
Which principle suggests black holes can evaporate over time?
A) Einstein’s relativity
B) Newton’s gravitational law
C) Hawking radiation
D) Doppler effect
