Stellar Lifetimes
This type of star lives longer (high-mass or low-mass)
What is a low-mass star?
The HR diagram is a diagram showing the distribution of _____ and ______.
What are stellar colors and luminosities?
The letters O, B, A, F, G, K, and M represent this in stellar classification.
What are the spectral types or classes of stars?
The Canis Major constellation is also known as this.
What is Big Dog?
Without a telescope, human eyes are able to see which of the following.
a) a few thousand stars
b) millions of stars
c) only hundreds of stars
d) billions of stars
What is a) a few thousand stars?
The more massive the star, the __________ its lifetime.
What is shorter?
Most stars are on the _______.
What is the main sequence?
The spectral type of the sun
What is G (specifically G2V)?
This constellation contains the North Star, Polaris.
What is Ursa Minor?
This photo shows what Nebula.
What is The Crab Nebula?
The lifetime of a star strongly depends on its initial ____.
What is mass?
These stars are much more luminous and larger than they were during their main sequence phase.
What are giants?
This Roman numeral is used to classify main-sequence stars in the luminosity class system.
What is V (five)?
This is the brightest star in the constellation of Gemini.
What is Pollux?
These are pictures of what Galaxy.
What is the Andromeda Galaxy?
Around ____ % of stars are on the Main Sequence.
What is 95?
These stars are the most luminous.
What are supergiants?
Stellar surface temperature ranges from ~ ______K for the hottest O-type stars to ~______K for the coldest M-type stars.
What is 50,000 and 2,000?
This is the brightest star in the constellation of Taurus.
What is Aldebaran?
A difference of 5 magnitudes for two stars means that.
What is one of them appears 100 times brighter than the other?
High-mass stars have a lifetime of around ____ years.
What is 3 million
The HR Diagram is named after these two men (first and last names).
Who are Ejnar Hertzsprung and Henry Norris Russell?
This type of star is classified as luminosity class III.
What is a giant?
These are the names of the three stars of Orion’s belt.
What are Alnitak, Alnilam, and Mintaka?
In 1938, this man correctly described nuclear fusion in stars (the so-called proton-proton cycle).
Who is Hans Bethe?