
Astro Quiz 2025
Authored by Pavithra K
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25 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
To explain the remarkably uniform temperature of the cosmic microwave background, despite vast distances between regions, cosmologists invoked an ultra-brief yet monumental expansion.
What theory addresses this early “smoothing” of the universe?
Quantum tunneling
Cosmic inflation
Big Crunch
String cosmology
2.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
When a star slightly larger than the Sun dies, its end isn't explosive but elegant. It exhales glowing gas shells, leaving a dense core behind.
What do we call this brief luminous phase during stellar death?
Nova
Coronal ejection
Planetary nebula
Red supergiant bloom
3.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
In the infant universe, just minutes old, nuclear fusion began stitching atomic nuclei. Yet only certain light elements formed in appreciable amounts before the universe cooled too much.
Beyond hydrogen, which element emerged in significant abundance during this primordial nucleosynthesis?
Lithium
Helium
Oxygen
Carbon
4.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
As a white dwarf accumulates mass from a binary companion, a critical threshold exists beyond which electron degeneracy pressure can no longer support it. Surpassing this mass doesn't merely increase its size , it triggers catastrophic collapse.
What is this theoretical mass boundary known as?
Roche limit
Schwarzschild radius
Chandrasekhar limit
Hawking boundary
5.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
During the Planck epoch, the universe existed at extreme temperatures and densities, where known laws of physics break down. Around 10⁻⁴³ seconds after the Big Bang, a key event is believed to have occurred that marked the end of this epoch and the beginning of a more structured universe .What is this pivotal event?
Onset of stellar nucleosynthesis
Gravity decoupling from the other fundamental forces
Formation of the first galaxy clusters
Reionisation of the intergalactic medium
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Astronomers observe a certain type of star that, after a long quiet phase, suddenly flares up dramatically brightening by many magnitudes almost overnight. Over the following weeks to years, it slowly dims back to its usual faint state. This explosive event involves material accreting onto a white dwarf in a binary system, triggering a runaway nuclear reaction on its surface.
What four-letter word, starting with N, describes this stellar phenomenon?
Neap
Node
Nova
Nuke
7.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
At the heart of our galaxy, an invisible force anchors stars in tight, rapid orbits, despite emitting no visible light. Known only through its gravitational influence and faint radio emissions, this enigmatic object defies direct observation. Which of the following best explains what lies at the center of the Milky Way?
A massive neutron star cluster
A dormant quasar
A supermassive black hole named Sagittarius A*
A dark matter core
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