Brand Our Solar System Flashcards
Which magnitude would be associated with the brightest star
-5
Which stars are composed of matter in which electrons have combined with protons
Neutron stars
A light year is approximately ___ kilometers
9.5 trillion
Which does not affect the apparent brightness of a star?
Size distance and temp affect
What is parallax
Hhhhhh
A hertzsprung Russell (h-r) diagram shows the relationship between
Temp and absolute magnitude
When a main sequence star has exhausted the fuel in it’s core it becomes
A red giant
Af it’s nucleus the Milky Way galaxy is about 100,000 light years wide and ____ light years thick
10,000
Based on the observed red shifts in the spectral lines of distant galaxies astronomers conclude that the universe is
Expanding
The mass of a star can be determined by studying
It’s orbit around a binary companion
What evidence supports the Big Bang theory
Red shift cosmic microwave background radiation
The sun is a __star
Main sequence
Which force is most responsible for the formation of a star
Gravity
What are the different types of galaxies
Spiral elliptical irregular
another name for the interstellar matter that will eventually form a star is
Nebula
Stellar distance is usually expressed in what units
Fjhhhhhh
The measure of a stars brightness is called it’s
Magnitude
Name the types of nebulae
?????
About 90% of the stars on the hr diagram are
Main sequence
Massive stars terminate in a brilliant explosion called
Super nova
In the cores of extremely hot red giants nuclear reactions concert helium to
Carbon
Stars of which color have the hugest surface temperature
Blue
Greater red shifts in the spectra of the galaxies indicate
Moving further away an accelerating
What is the next stage in the suns life cycle
Red giant
