Stars and Galaxies

Front

How is energy generated during main sequence?

Back

Hydrogen fuses into helium.

Front

What shape is an elliptical galaxy?

Back

A galaxy with a football shape.

Front

What is a black hole?

Back

An object so dense that even light can't escape.

Front

What is a neutron star?

Back

A dense collapsed star whose electrons and protons smashed together to form neutrons.

Front

What is a nebula?

Back

A large cloud of gas and dust in space where stars are born.

Front

What is the life cycle of a star?

Back

A star goes through stages: nebula, main sequence, red giant, and then either a white dwarf, neutron star, or black hole.

Front

What is the difference between a spiral galaxy and an elliptical galaxy?

Back

Spiral galaxies have arms that spiral outward, while elliptical galaxies are more rounded and lack distinct arms.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

It classifies stars based on their brightness and temperature, showing the relationship between them.

Front

What is a supernova?

Back

A massive explosion that occurs at the end of a star's life cycle, often resulting in the formation of a neutron star or black hole.

Front

What is dark matter?

Back

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