Properties of Stars
The visual cue used to determine the spectral classification of a star.
What is color?
This type of star, ranging between 5,000 and 6,000 K, is easily seen in the daytime sky in Earth.
What is a G-Type Star?
What is the Earth's core?
The scientists for whom the HR diagram is named.
Who are Hertzsprung and Russell?
The massive clouds of gas and dust from which stars are formed.
What are nebulae/interstellar clouds?
These stars are roughly the size of Jupiter.
What are red dwarfs/M-type stars?
This is the least abundant type of star in the observable universe.
What are O-Type Stars?
The surface temperature of the Sun, in Kelvin.
What is 5,500?
These two stellar characteristics are most often used as the x and y axes of the H-R diagram, respectively.
What are temperature and luminosity?
These extremely dense stellar objects carry no charge.
What are neutron stars?
This is the process that powers stars and causes them to shine.
What is mass?
Strong magnetic fields force plasma on the surface of the sun, forming these.
What are sunspots?
The vast majority of stars are found here in the HR diagram.
What is the main sequence?
The life stage of a star after all the hydrogen is exhausted in its core.
What is the giant phase?
What are carbon and oxygen?
Sirius is an example of this type of star.
What is Type A?
This middle zone of the sun is named for the same fundamental force that makes the water in a pot go through a "rolling boil"
What is the convective zone?
A red giant would be found in this location on the HR diagram.
What is the top right?
A star exceeding 8 solar masses will become this after it undergoes a supernova explosion
What is a black hole?
Stars within this range of solar masses will end their lives in a supernova and become neutron stars.
What is between 3 and 8 solar masses?
These variable red supergiants are named after the first star that was confirmed to exhibit this behavior.
What are Mira variables?
This layer of the sun can only be seen during a full solar eclipse. Witnessing it is a crowning achievement in anyone's life.
What is the corona?
Found in the bottom left corner of the diagram, these stars represent the end of an average mass star.
What are white dwarves?
An average mass star sheds its gaseous layers at the end of its life in this beautiful spectacle.
What is a planetary nebula?