Big Bang and Cosmology Review

Front

What is the composition of most of the universe?

Back

Most of the universe is made of dark energy and dark matter.

Front

What phenomenon allows us to see around distant celestial objects?

Back

Gravitational lensing.

Front

Does light move at a constant speed?

Back

True.

Front

What common characteristic do the initial moments after the Big Bang and the current universe share?

Back

The universe began expanding then, and it is still expanding today.

Front

What are the possible fates of the universe?

Back

The universe could either expand forever, expand and then collapse, or expand and remain a constant size.

Front

What is dark matter?

Back

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

Front

What is dark energy?

Back

Dark energy is a mysterious force that is causing the acceleration of the universe's expansion.

Front

What is gravitational lensing?

Back

Gravitational lensing is the bending of light from a distant object due to the gravitational field of a massive object between the source and the observer.

Front

What is the Big Bang?

Back

The Big Bang is the leading explanation for the origin of the universe, describing how it expanded from a hot, dense state.

Front

What evidence supports the Big Bang theory?

Back

Evidence includes the cosmic microwave background radiation, the abundance of light elements, and the redshift of distant galaxies.