Astronomy 3 #3
In which region do we find the coolest star?
B
In which region would we find a 0.3 Mo main sequence star?
B
In which region would we find a star with the lowest luminosity (faintest absolute magnitude)?
B
In which region would we find the sun in about 3 billion years from now?
B
Which spectral type main sequence star would have a total lifetime of slightly longer than the sun's total lifetime (according to preset calculations)? A. A B1 star B. A G3 star C. A B4 star D. A G1 star E. An O3 star
B.
In which region do we find a 20 Mo (solar mass) main sequence star?
C
In which region would we find the hottest star?
C
In which region would we find stars fusing hydrogen to helium in their cores?
C and B
Assume there is an extrasolar planet discovered orbiting around a G0 spectral type main sequence star. What would be good estimate of this planet's distance from its star in order to be in the star's "habitable zone" (region where liquid water can exist)? A. 15.5 au B. 10.6 au C. 1.3 au D. 0.8 au E. 0.001 au
C.
In which region would we find stars about ready to go through the planetary nebula stage?
D
The most accurate way of determining the evolution of stars from one region to another on the H-R diagram is ____ A. Watching stars over time B. Looking at light curves C. Plotting stars by hand D. Computer modeling
D.
The most energetic supernovae are referred to as ____ A. X-ray bursts (XRB's) B. Blazars C. Quasars D. Hypernovae E. Super-supernovae
D.
What color would a k5 spectral type star be? A. Reddish B. Blue-ish C. Violet D. Orange-ish E. Yellow-ish
D.
Why do neutrino detectors conduct their neutrino experiments at night? A. Cooler temperatures are needed B. It must be perfectly dark in the lab rooms C. The chlorine in the water tanks will break down in sunlight D. The Earth is used as a filter against any other particles
D.
In which region would we find stars fusing iron in their cores (even if iron fusion just lasts for a fraction of a second)?
E
In which region would we find the star with the largest diameter?
E
The name of the neutrino detection facility in Antarctica that was featured in our PowerPoint is _____
IceCube
The owl nebula, dumbbell nebula and ring nebula are examples of _____
Planetary Nebulae
The Kepler planet finder mission has discovered many extrasolar planets by using the method of ______
Planetary transits
The Dogon tribe in Africa was very concerned with the star ______
Sirius
Which of the 4 stars shown has the highest luminosity?
Star 1
Which of the 4 stars shown is an A7 Luminosity Class 1 star?
Star 1
Which of the 4 stars shown has the largest diameter?
Star 2
Which of the 4 stars shown has the hottest surface temperature?
Star 3
Which of the 4 stars shown is an A3 Luminosity Class V star?
Star 3
Which of the 4 stars shown has the coolest surface temperature?
Star 4
Which of the 4 stars shown has the lowest luminosity?
Star 4
Which of the 4 stars shown has the lowest mass?
Star 4
Which of the 4 stars shown is a M5 Luminosity Class V star?
Star 4
Sometimes, a planet moves in front of its star and blocks a little bit of the star's light. When this happens, it is called a(an) ______
Transit
Iron fusion leads to a supernova because iron fusion
absorbs energy
What keeps gravity from collapsing a main sequence star?
gas pressure and radiation pressure
The Greeks thought the sun was a ____ A. Hot rock B. Galaxy C. Light bulb D. Comet
A.
What color would a M5 spectral type star be? A. Reddish B. Blue-ish C. violet D. Orange-ish E. Yellow-ish
A.
Which is not a property of a neutrino? A. High mass B. High velocity C. Very non-interactive (not detected or stopped easily) D. Neutral (0) in charge
A.
Which main sequence star, of the ones listed, would be the least common in the universe? A. A 11.4 Mo star B. A 5.3 Mo star C. A 2.8 Mo star D. A 3.2 Mo star E. A 6.6 Mo star
A.
Which star listed below would have the shortest total lifetime on the main sequence? A. a 15.5 Mo star B. a 14.3 Mo star C. a 0.8 Mo star D. a 10.0 Mo star E. a 0.3 Mo star
A.
Which statement is correct about each successive fusion on the cores of supergiant stars? A. Each successive fusion requires a higher temperature and does not last as long as the previous fusion B. Each successive fusion requires a higher temperature and lasts longer than the previous fusion C. Each successive fusion requires a lower temperature and does not last as long as the previous fusion D. Each successive fusion requires a lower temperature and lasts longer than the previous fusion
A.
In which region would we have found the Sun about 8 billion years ago?
AB
According to calculations, the Sun has _____ years left to go on the main sequence.
5-7 billion
