Space Physics Trivia Questions & FAQ

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Professional Space Physics FAQ Questions and Answers

Welcome to our comprehensive Trivia Quiz and interview preparation guide. Below you will find a curated list of popular Trivia Questions and Answers specifically for Space Physics. Whether you are preparing for a technical interview or just testing your knowledge, these FAQ Questions will help you succeed.

What orbital bodies are found in our solar system?

Planet; dwarf planets; moons; artificial satellites

What defines a planet?

A body that orbits a star, massive enough for its own gravity to make it round

What defines a moon?

A natural object which orbits a planet

What galaxy is our solar system part of?

Milky Way galaxy

How is a star formed?

From clouds of dust and gas drawn together by gravity, which caused fusion reactions to occur

What is a nebula?

A cloud of dust and gas

What is a protostar?

When dust and gas are pulled together by gravity

When does a protostar become a main sequence star?

When gravity is strong enough for nuclear fusion to happen, releasing energy

What is the life cycle of a star that is a similar size to our sun?

Nebula; protostar; main sequence star; red giant; white dwarf; black dwarf

What is the life cycle of a star that is much bigger than our sun?

Nebula; protostar; main sequence star; red super giant; supernova; neutron star or black dwarf

What is nuclear fusion?

When two smaller nuclei fuse together to form one larger nucleus, releasing energy from the reaction

What elements are fused together during the main sequence stage of a star life cycle?

Hydrogen nuclei fuse to form helium nuclei

Why are stars ?stable? during the main sequence stage?

The outward pressure caused by fusion is balanced by the force of gravity pulling everything inwards

What causes main sequence stars to expand and turn in red giants / super giants?

Hydrogen runs out and heavier elements are formed

Which elements can be created in a star?

Elements up to iron

What is a red giant?

A cooler, bigger star that is formed after hydrogen has run out, and heavier elements are being formed

What is a white dwarf?

What is left behind when a star ejects its outer layer of dust and gas to leave behind a hot, dense solid core

What is a black dwarf?

What is left behind as a white dwarf cools down and no longer emits a significant amount of energy

What is a supernova?

The explosion of a massive star

What elements are formed in a supernova?

Elements heavier than iron

What is a neutron star?

What is left behind after a supernova has thrown the outer layers of dust and gas into space leaving a very dense core

What is a black hole?

What is left behind after the supernova of a massive enough star that is so dense, not even light can escape the gravitational pull

What shape is the shape of an ?orbit??

Circular

What is an artificial satellite?

Something man-made which is in orbit of the Earth

What is the force that keeps something in orbit?

Gravity

In a circular orbit, how can there be changing velocity if the speed is constant?

It is constantly changing direction to remain in the circular orbit

What must also be true if an object is constantly changing velocity in circular orbit?

It is also constantly accelerating

What happens to the speed of an orbiting object if the radius of its orbit decreases?

It speeds up

Why does the speed of an object change depending on how close it is to the thing it is orbiting?

The force of gravity changes so it needs to speed up/slow down to maintain a stable orbit

What is the Doppler effect?

The observed change in frequency of the waves emitted by a moving source

What is red-shift?

The observed increase of wavelength of light waves coming from distant galaxies

What does red-shift tell us about the universe?

That the light source is moving away from us, therefore the universe must be expanding

What does it show us that more distant galaxies have greater red-shifts than nearer ones?

More distant galaxies are moving away faster than nearer ones

What is the big bang theory?

The universe began from a very small region that was extremely hot and dense

How does observed red-shift support the Big Bang theory?

The universe is expanding, so therefore must have once been much smaller

What have scientists observed since 1998 to suggest the rate of universe expansion is increasing?

By observing supernovae it shows that distant galaxies are moving away from us faster and faster

Why is it important for scientists to keep observing changes in the universe?

Observations allow them to obtain data, which can then either confirm or reject current theories

What do scientists currently think the universe is made up of?

Dark matter and dark energy