Life cycle of a star/HR diagram

Front

What is a planetary nebula?

Back

A planetary nebula is a shell of gas that is ejected from a low to medium mass star at the end of its life cycle, leaving behind a core that becomes a white dwarf.

Front

What type of star is very hot but not very bright?

Back

White Dwarfs are very hot stars that are not very bright due to their small size.

Front

What is a protostar?

Back

A protostar is a 'baby' star that is still gathering mass from a nebula and has not yet begun nuclear fusion.

Front

Which star is hotter: Vega or Pollux?

Back

Vega is hotter than Pollux.

Front

What happens during the Red Giant phase of a star?

Back

During the Red Giant phase, an average star expands its outer layers, increasing in size and luminosity.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages such as nebula, protostar, main sequence, red giant, and either planetary nebula or supernova, leading to white dwarf, neutron star, or black hole.

Front

What is a supernova?

Back

A supernova is a powerful explosion that occurs at the end of a massive star's life cycle, resulting in the star's outer layers being expelled.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the Hertzsprung-Russell (HR) diagram?

Back

The HR diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What are Blue Giants?

Back

Blue Giants are very hot and luminous stars that are much larger than the Sun.