The measure of a star's brightness or luminosity is called what?

The brightness that a star appears to be from Earth is called what?

What is the name for how bright a star would appear if it were seen from a distance of 32.6 light years?

A unit of distance that measures how far light travels in one year.

The apparent shift in the position of a star when viewed from different points of observation, to determine the distance a star is away from Earth.

An imaginary sphere surrounding the Earth, where all stars are considered to be projected onto its inner surface, which is used to map their positions in the sky.

Stars that can always be seen in the night sky and never appear to go below the horizon level are called what?

Circumpolar stars circle in the night sky around which star?

Which circumpolar constellation can be seen closest to the north star?

The name for a group of visible stars forms a full pattern or outline on the celestial sphere.

How many official constellations are on the celestial sphere?

What is the name for the 12 constellations that are on the ecliptic line of the celestial sphere?

What is the name for smaller parts of large constellations or small parts of different constellations?

Which of these is classified as an asterism?

All of the changes in size, composition, and structure a star goes through during its lifetime is called what?

Stars from large clouds of dust and gas in galaxies called what?

As a nebula collapses, the friction from collisions of gas and dust increase the temperature to create what objects?

What is it called when two hydrogen atoms collide and fuse together to create helium and release large amounts of energy and light making a star visible.

What is the process within stars where nuclear fusion reactions occur, leading to the formation of new elements called?

A type of nuclear fusion that occurs after a star has used up all the hydrogen in its core and transitioned to a red giant star burning helium is called what? 

What is the name for the balance between the inward force of gravity and the outward force of nuclear fusion that enables a star to keep its shape?

How does the force of nuclear fusion impact the hydrostatic equilibrium of a star?

How does the force of gravity impact the hydrostatic equilibrium of a star?

Which term States that more massive stars are significantly more bright compared to less massive stars.

A system of two stars that are gravitationally bound to and in orbit around each other is called what?

After a star is formed its life cycle can take one of two pathways based on what feature of the star?

What is the name for all of the stars that are fusing hydrogen gas within their cores?

What is the name for the smallest and coldest of the stars that are fusing hydrogen gas within their cores?

What is the name for the largest and warmest of the stars that are fusing hydrogen gas within their cores?

What is the name for a type of star that is significantly larger in size and has a much shorter life span compared to smaller stars.

What is the name for a supergiant star that is pulsating light or changing in brightness over periods of time?

What is the name for stars that have used up their hydrogen fuel and are now fusing helium?

What is the next step of an average mass star's life cycle after a red giant star uses up all of its fuel?

After the outer gasses of a planetary nebula drift away what is left behind?

Which type of star is not producing an energy from nuclear fusion in its core?

What is the name for the star remnant of a white dwarf that has cooled sufficiently to no longer emit significant heat or light.

Which type of star do we not know if really exists because there has not been enough time in the universe to see?

The start of this star type marks the start for the death phase of a star.

What is the name for the large explosion that occurs when gravity overwhelms a red supergiant star that runs out of fuel?

What is the name for the ring of material left over right after a supernova explosion?

What is created after the dust drifts away from an supernova remnant nebula?

What is another name for a rotating neutron star that emits light similar to a lighthouse?

What is the name for the densest object in the universe formed after a supernova explosion with a huge amount of gravity?

The point at the center of a black hole is called what?

The point at which light cannot escape from a black hole that marks the point of no return is called what?

What is the name for a large collection of millions of stars, nebulas, planets, and often black holes?

What is a scatter plot that shows the relationship between a star's luminosity and its temperature?

In the H-R diagram given, what happens as you move to the left?

In the H-R diagram given, what happens as you move to the right?

In the H-R diagram given, what happens as you move upwards?

In the H-R diagram given, what happens as you move downwards?

Blue stars are the _____________.

Which letters correspond to red colored stars?

Which letter corresponds to where our sun is located on the H-R diagram?

Which letter corresponds to where our red dwarf stars are located on the H-R diagram?

Which letter corresponds to where blue colored stars are located on the H-R diagram?

Which letter corresponds to where blue supergiant stars are located on the H-R diagram?

Which letter corresponds to white dwarf stars?

Which letter corresponds to red giant stars?

Which letter corresponds to red supergiant stars?

Which letter corresponds to main sequence stars?

What is the name for the balance as star has as shown in the diagram?

What kind of star is shown in the image?

What is the name for the explosion shown in the animation after nuclear fusion stops?

What is the name for the object remaining after the super nova explosion shown?

What type of nebula is shown in the image?

What is the name for the grouping of yellow circled stars in the image?

What is the name for the grouping of stars in the image?

Betelgeuse and Rigel are classified as what type of stars?

Which star in the image is classified as a red supergiant?

Which type of star makes up 90% of the stars in our galaxy?

Which type of star can have the longest life span?

The ______ the star, the _____ its life span is.