According to the H-R diagram, these colored stars are considered to be the COOLEST.
What are RED STARS!
100
Dark, cooler regions on the Sun that are caused by magnetic activity are called______________?
What are dark spots!
100
A huge collection of stars is considered to be a _________!
What is a galaxy!
100
Astronomers use these measurements when dealing with distances between objects such as PLANETS within the solar system.
What are astronomical units!
200
According to the H-R diagram, these colored stars are considered to be the WARMEST.
What are blue-white!
200
What are the 3 atmospheric layers of the Sun?
What are photosphere, chromosphere, and corona!
200
What force causes gases and dust particles to clump together?
What is gravity!
200
The term describes the apparent movement of a star. This term is also used to measure distance. It is the shift in positions of an object when it is being viewed from two different angles.
What is parallax!
300
Classification of MOST stars on the H-R diagram. A star spends 90% of its life cycle here.
What is main sequence!
300
How will our Sun change in time? What do astronomers believe our Sun will eventually become?
What is Red- giant --> white dwarf
300
This type of galaxy considered to be the LARGEst known galaxy. This galaxy is also considered to be the MOST COMMON!
What is elliptical galaxy!
300
This term explains the brightness of an object as it appears to the observer viewing the object form Earth.
What is apparent magnitude!
400
This process produces energy. It can do this by fusing hydrogen into helium.
What is fusion!
400
This atmospheric layer of the Sun is considered to be the warmest.
What is the corona!
** Remember that atmospheric layers refers to the OUTER layers!
400
This particular measures 100,000 light-years across.
( not a type)
What is the Milky Way Galaxy!
400
This is how astronomers measure distance of objects BEYOND the solar system.
What is a light-year!
500
STAGE in star's life cycle which the CORE of a main sequence star uses up its helium and the outer layers ESCAPE into space.
What is white dwarf!
500
What are the 3 interior layers of the Sun?
What are core, radiative zone, and convection zone!
500
The spiral structure of the Milky Way Galaxy (the galaxy we live in) cannot be seen from Earth because______________
What is Earth is located within one of the spiral arms! (Orion)
500
An object's true actual brightness is also referred to as________.