Term
| How long does it take light to get to the Sun from Jupiter? |
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Definition
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Term
| 1.5 times 10^-3 is between |
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Definition
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Term
| East and West is longitude, North and South is latitude. How do these relate to the Celestial Sphere? |
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Definition
| longitude is right ascension, latitude is declination |
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Term
| Currently the object at celestial North Pole? |
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Definition
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Term
| The sun rises in the east and sets in the west because... |
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Definition
| the Earth spins on its axis |
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Term
| Vega has a magnitude of .03, HR4374 has a magnitude of 4.87. They are equidistant apart, meaning... |
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Definition
| Vega produces more energy, has a greater intrinsic brightness |
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Term
| Mira R Cassiopeia varies by three magnitudes, how much brighter is its bright phase than its faint phase? |
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Definition
| (2.5)^3= 15.625 times brighter |
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Term
| Proxima Centauri is 4 light years away. This means... |
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Definition
| The star we see left the star four years ago. |
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Term
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Definition
| bending of light as it passes from one transparent medium to another |
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Term
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Definition
| bending of light around an obstacle, such as a pinhole or narrow slit |
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Term
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Definition
| bouncing of light off a suitable surface |
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Term
| Constructive interference is: |
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Definition
| when two wave "peaks" combine in a way that amplifies or reinforces each other |
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Term
| Prism when different wavelengths refracting different amounts when passed through one transparent medium to another is called |
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Definition
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Term
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Definition
| Both electric and magnetic fields |
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Term
| Wavelength range for the visible part of the spectrum is approximately |
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Definition
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Term
| The part of a spectrum with the longest wavelength is |
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Definition
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Term
A photon wavelength with the most energy is...
10, 100, or 10,000 A |
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Definition
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Term
| When electric field components of light are aligned in the same direction, light is |
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Definition
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Term
| Measure that quantifies average molecular and atomic motion is |
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Definition
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Term
| When light undergoes a reflection it will become, |
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Definition
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Term
| The spectral region that is blueward of the infared waves is |
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Definition
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Term
| Zero Kelvin is defined as |
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Definition
| point at which atomic and molecular motion stops |
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Term
| Mercury has 80 protons and 120 neutrons. Aluminum has 13 protons and 13 neutrons. Neutrons and protons weigh the same. Which will have greater atomic motion? |
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Definition
| Aluminum will have greater atomic motion than mercury |
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Term
| Spectrum when solid, liquid, or opaque gas is heated above absolute zero is a |
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Definition
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Term
| Star A has a hotter surface temperature than Star B, both are identical in size and distance. This means |
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Definition
| Star A is bluer/brighter than Star B |
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Term
| Star A has hotter surf. temp but both have equal size and distance. If Star A is two times hotter than Star B, by what factor will the two differ in brightness? |
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Definition
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Term
| Light bulb A is heated to 3,000 K. It will have maximum intensity at 10,000 A. The surface temperature of the Sun is 6,000 K. What will its peak wavelength emitted be? |
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Definition
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Term
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Definition
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Term
| Ionization is the removal of what from a given atom? |
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Definition
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Term
| Whether a substance is solid, liquid, or gas depends on.. |
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Definition
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Term
| H gas is can produce light with a wavelength of 4681 A (blue/green color). The wavelength is now seen at 4800 A. This means.. |
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Definition
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Term
| Energy emitted at specific discrete wavelengths by (not excited) transparent gases is called: |
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Definition
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Term
| The spectrum formed when continuous thermal (or black body or plank) spectrum is passed through a cooler gas is called: |
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Definition
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Term
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Definition
| Transition A emits a redder photon than transition B |
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Term
| A travels in a car at a very rapid rate (50,000 km/sec); B stands on the side of the road. A turns on the light and A measures the beam at 300,000 km/sec and B measures |
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Definition
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Term
| Einstein's Theory of Relativity. You drive a car at speeds near that of light. Observer beside the road will see: |
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Definition
| The car's bumper to bumper length is shorter |
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Term
| The same observer looking at your watch will see: |
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Definition
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Term
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Definition
| No difference in length or height |
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Term
| You, looking at your own watch will see: |
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Definition
| no difference in time passage |
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Term
| Consequence of the constancy of the speed of light is that: |
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Definition
| space and time are inextricably linked |
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Term
| Einstein's theory of relativity explains that the path (direction) of light can be altered by: |
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Definition
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Term
| Star A is three times further than Star B. Star A appears how many times fainter than Star B? |
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Definition
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Term
| Rapid (but small) fluctuation in position and brightness of a stars when seen through the earth's atmosphere is called: |
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Definition
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Term
| Difference in the focal lengths of blue and red light when passed through a lens: |
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Definition
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Term
| A star's normal, characteristic spectra is: |
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Definition
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Term
| Major reason for finding astronomical satellites, especially in gamma, x-ray, UV, and microwave regions is: |
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Definition
| Earth's atmosphere is opaque to most of the electromagnetic spectrum |
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Term
| Viewing stars through a reasonable amount of the Earth's atmosphere they appear how compared to how they would without any atmosphere? |
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Definition
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Term
| Two telescopes: A is a retracting with an objective diameter of 5m. B is a reflecting telescope with an effective objective diameter of 1m. |
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Definition
| Telescope A has better light gathering power and telescope A has better resolving power. Telescope A can gather in 25 times more light. Telescope A can resolve objects that are five times closer. |
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Term
| Star A shows a parallactic shift of 0.1 arcsec and Star B has a parallactic shift of 0.01 arcsecs, thus: |
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Definition
| Star A is closer than Star B |
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Term
| If you knew both apparent and intrinsic brightness of a star, you can determine: |
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Definition
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Term
| Proper order of spectral classifications: |
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Definition
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Term
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Definition
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Term
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Definition
Hertzsprung-Russell Diagram
Main Sequence- C
Red Giant Stars- B
Super Giant Stars- A
White Dwarfs- D |
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Term
| O type stars do not show strong spectral lines due to Hydrogen because |
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Definition
| Temperatures are too high and all of existing H is ionized |
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Term
| M type stars do not show strong spectral lines because |
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Definition
| H temperatures are too low to excite H atoms to the first level |
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Term
| If distance between Sun and Earth were tripled, gravitational force exerted on Sun due to Earth's mass would be: |
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Definition
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Term
| If mass of earth were tripled, gravitational force exerted on Sun due to Earth's mass would be: |
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Definition
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Term
| You are looking at two stars. Star 1: K5 V star, Star 2: K5 I star. Which is further |
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Definition
| Star 2 is further than Star 1 |
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Term
| Intrinsic property of a star that can only be measured if the star is part of a binary system: |
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Definition
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Term
| Evidence that the Sun has strong magnetic fields is given by evidence of: |
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Definition
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Term
| Sunspots appear dark because: |
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Definition
| They are cooler than surrounding surface. |
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Term
| Stars appear darker at their edges than at their centers: |
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Definition
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Term
| Star polar region rotate slower than its equatorial region |
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Definition
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Term
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Definition
| 11 years, the sun's internal magnetic poles switch |
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Term
| Visible surface of the sun: |
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Definition
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Term
| Evidence that the sun has underlying convection zone is primarily given by observations of: |
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Definition
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Term
| Needle like filamentary structure that are found in the chromosphere are: |
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Definition
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Term
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Definition
A: Corona
B: Transition region
C: Chromosphere
D: Photosphere |
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Term
| Period (1645-1715) of extremely low activity of sunspots |
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Definition
| Maunder minimim, cooler temps |
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Term
| Solar winds image of earth's magnetic fields produces |
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Definition
| aurora borealis/australis |
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Term
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Definition
| four H atoms converted into one He |
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Term
| Particle emitted from the core of the sun during nuclear fusion |
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Definition
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Term
| What tries to collapse stars? What tries to expand stars? |
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Definition
Gravity: collapse
Gas pressure and radiation pressure: expand |
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Term
| Forces that are trying to collapse a star are balanced by forces trying to expand a star |
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Definition
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Term
| Amount of energy lost at the surface of a star is precisely compensated by the amount of energy: |
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Definition
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Term
| High temps are needed for nuclear fusion to occur because: |
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Definition
| They speed the nuclei up so that when they collide they hit with sufficient force to overcome electromagnetic force |
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Term
| High pressure is needed for nuclear fusion to occur because: |
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Definition
| they cause the nuclei to be "packed" closer together, increasing the number of collisions that occur |
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Term
| Where are photons created in the sun? It takes them one million years to pass through the _______ zone and then the ___________ zone. |
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Definition
Core.
Radiative and Convective. |
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Term
| What is responsible for large magnetic fields in the sun? |
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Definition
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Term
| What is important in building the initial stellar core because it sticks? |
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Definition
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Term
| As a cloud of material gravitationally collapses: |
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Definition
| it will spin faster and heat up |
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Term
| Large, cold blob of gas that is collapsing and accreting new material on central region |
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Definition
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Term
| small, hot blob of gas due to radiation pressure, clears away remnant material why central region collapses |
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Definition
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Term
| extensive equitorial disk of material, balance of accretor and outflow around central collapsing region |
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Definition
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Term
| Frost line forms between: |
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Definition
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Term
| The sun______a ZAMS star____________________________. |
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Definition
| was; when it first started generating energy via nuclear reactions |
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Term
| High mass stars: photons created in_____; pass through_______ then _________stars. |
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Definition
core.
convective.
radiative. |
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Term
| Region that dominates the interior structure of a low mass star: |
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Definition
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Term
| When sun first formed it was _______ in high energy light because Sun had _______ magnetic activity. |
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Definition
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Term
| What happened to DOOM Mars 3.5 billion years ago? |
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Definition
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Term
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Definition
A: Fuse C to Ne
B: burning He
C:Helium flash occurs
D: single shell burning source, He to He in shell only
E: H to He only in core |
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Term
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Definition
| three He atoms into one C atom |
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Term
| ejected mass from a soon to be white dwarf |
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Definition
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Term
| Gas that atoms are packed so close together, that ground states of electrons physically touch |
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Definition
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Term
| maximum mass of white dwarf |
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Definition
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Term
| Mass radius relationship: Chandrasekhar if you________ of a white dwarf, the ____________. |
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Definition
| decrease the mass; radius will increase |
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Term
| material insdie a white dwarf is: |
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Definition
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Term
| one tablespoon of white dwarf material on earth would weigh: |
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Definition
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Term
| heaviest element synthesized through burning in cores of stars is: |
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Definition
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Term
| Envelope of star is ejected in supernova explosion: |
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Definition
| discovery that high temperature in the core at the instant of collapse produced a brief burst of a large number of neutrinos |
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Term
| A gas that atoms are packed so close together that the nuclei physically touch |
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Definition
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Term
| rapidly rotating neutron stars |
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Definition
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Term
| older pulsars_______ than younger ones |
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Definition
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Term
| material found in neutron star is in: |
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Definition
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Term
| One tablespoon of neutron star material on earth weighs close to: |
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Definition
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Term
| The region around a blackhole where light can't escape: |
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Definition
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Term
| Physical size of a white dwarf most closely resembles: |
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Definition
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Term
Physical size of a neutron star most closely resembles:
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Definition
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Term
Physical size of a black hole most closely resembles:
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Definition
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Term
| At what Main Sequence mass is a star likely to leave behind a neutron star? |
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Definition
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Term
At what Main Sequence mass is a star likely to leave behind a black hole?
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Definition
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Term
| Proper life cycle for star having a mass of 50 M: |
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Definition
| protostar, main sequence, red/super giant, supernova, black hole |
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Term
Proper life cycle for star having a mass of 15 M:
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Definition
| protostar, main sequence, red/super giants, supernova, neutron star |
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Term
Proper life cycle for star having a mass of 0.15 M:
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Definition
| protostar, main sequence, planetary nebula, white dwarf |
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Term
| Help confirm presence of neutron stars and black holes |
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Definition
| normal star binary systems |
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Term
| When a star begins to fuel Fe in its core a _________ occurs. |
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Definition
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Term
| When the surface of a white dwarf exceeds 6 million K a _____ occurs. |
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Definition
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Term
| When the mass of a white dwarf exceeds 1.42 M a _______ occurs. |
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Definition
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Term
| In type Ia of a supernova, most of the total energy emitted is in the form of: |
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Definition
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Term
| In a type II supernova, most of the total energy emitted is in the form of: |
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Definition
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Term
| Revolution of a binary star system and mutual gravitational attraction results in tear-drop shape: |
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Definition
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Term
| Bigger Roche surface means: |
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Definition
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Term
| The point where gravitational forces are balanced is the: |
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Definition
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Term
| A giant molecular cloud beginning to form stars: |
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Definition
| the high mass stars begin to populate the main sequence while the low mass stars are still forming |
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Term
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Definition
| Cluster A is younger than B |
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Term
| Object or event that helps astronomers determine distance through intrinsic brightness |
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Definition
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Term
| Example of standard candle |
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Definition
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Term
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Definition
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Term
| Collapse of neutron star that exceeds limit: |
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Definition
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