The Universe

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What are absolute magnitude and apparent magnitude?

Back

Absolute magnitude is the actual brightness of a star, while apparent magnitude is how bright a star appears from Earth.

Front

What are the two most common elements in main sequence stars?

Back

Hydrogen and helium are the two most common elements that make up main sequence stars.

Front

Which type of star is brighter but cooler?

Back

A red hypergiant star is brighter but cooler compared to other types of stars.

Front

What determines the strength of gravity between two objects?

Back

Gravity is determined by the mass of the objects and the distance between them.

Front

What is the difference between conduction and convection?

Back

Conduction is the transfer of heat through direct contact, while convection involves the movement of fluids.

Front

What is a blue giant star?

Back

A blue giant star is a very hot and luminous star that is much larger than the Sun.

Front

What is luminosity?

Back

Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel.

Front

What is a red main sequence star?

Back

A red main sequence star is a type of star that is cooler and less luminous than other main sequence stars.