Structure of the universe flashcard

Front

What is a star?

Back

A star is a large celestial body that is composed of gas and emits light.

Front

What is a galaxy?

Back

A galaxy is a large collection of stars, gas, and dust.

Front

What type of galaxy is the Milky Way?

Back

The Milky Way is a spiral galaxy.

Front

What is the order of celestial structures from smallest to largest?

Back

The order is solar system, galaxy, universe.

Front

What is the universe?

Back

The universe is the vast expanse that contains all of space, time, matter, and energy.

Front

What are the main components of a galaxy?

Back

The main components of a galaxy include stars, gas, dust, and dark matter.

Front

What is the difference between a solar system and a galaxy?

Back

A solar system is a collection of planets and other celestial bodies orbiting a star, while a galaxy is a vast collection of many stars, solar systems, and other celestial objects.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the significance of the Big Bang theory?

Back

The Big Bang theory explains the origin of the universe, suggesting it began as a singularity and has been expanding ever since.

Front

What is a nebula?

Back

A nebula is a giant cloud of gas and dust in space, often the birthplace of stars.