Term
| where on E do you see the most circumpolar stars? |
|
Definition
|
|
Term
| where will stars appear to rise perpendicular to the horizon? |
|
Definition
|
|
Term
| place on ecliptic where sun stops its Nward motion in sky |
|
Definition
|
|
Term
|
Definition
|
|
Term
| vernal and autumnal equinoxes= |
|
Definition
| cel locations where cel equator and ecliptic coincide |
|
|
Term
| angle bw ecliptic and cel equator= |
|
Definition
|
|
Term
|
Definition
| tilt of Es Es axis rel to ecliptic |
|
|
Term
| where on E can you obs all stars in sky over whole yr |
|
Definition
|
|
Term
| why does stlr parallax exist? |
|
Definition
|
|
Term
| keplers first law states t pltary orbits are |
|
Definition
| ellipses w sun at one focus |
|
|
Term
| keplers 2nd law states t the ln t cnns plt to sun |
|
Definition
| sweeps out = areas in = times |
|
|
Term
| k's 3rd law of pltary motino states t |
|
Definition
| sq of pd of plts orbit in yrs = cube of semi-major axis of its orbit in au |
|
|
Term
| newtons 2nd law of motion states t |
|
Definition
| body acted on by force will accelerate constantly while force is applied |
|
|
Term
| (2)we can find the mass of the sun if we know... |
|
Definition
| the d a plt is f the sun and the time it takes to make a full orbit |
|
|
Term
| (2)Gal force bw 2 objs deps on |
|
Definition
| d bw 2 objs and their masses |
|
|
Term
| obj moving toward you shows |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| (2)doppler effect can det: |
|
Definition
| radial v of star and spd at wh star is moving away f an obser |
|
|
Term
| (2)compared to vis waves, radio waves have |
|
Definition
|
|
Term
| (2)compared to vis waves x-ray waves have: |
|
Definition
|
|
Term
| we see diff phases of moon por |
|
Definition
| its motion in its orbit runt E |
|
|
Term
| how does moon rot to keep one face pted toward E at all times? |
|
Definition
| it completes one full rotn (360deg) once per month |
|
|
Term
| day f sunrise to sunrise on moon = hm E days? |
|
Definition
|
|
Term
| why is moons synodic month not = to sidereal month? |
|
Definition
| bc E-moon sys is also orbiting sun |
|
|
Term
| eclipse of sun occurs only at |
|
Definition
|
|
Term
| eclipse of moon occurs only at |
|
Definition
|
|
Term
| rson why we see annular eclipses of sun |
|
Definition
| moons orbit ar E isnt perfectly circ |
|
|
Term
| why isnt it poss to see annular lunar eclipse? |
|
Definition
|
|
Term
| (3)moon moves acr sky in... |
|
Definition
| plane t is neither ecliptic nor cel =tor nor parallel to hor |
|
|
Term
| why does moon show reddish color during total lunar eclipse? |
|
Definition
| only red part os sol sp is deflected onto it by Es atm |
|
|
Term
| person standing on moon penumbra will see |
|
Definition
|
|
Term
|
Definition
| at new or full moon, when moon and sun are closest to E |
|
|
Term
| (2)why does moon rot ar E synchronously (always keeping one sd pted towards it)? |
|
Definition
| por Es Gal pull, wh causes tidal friction on moon |
|
|
Term
| length of day on E was... |
|
Definition
| shorter in past bc E spun faster |
|
|
Term
|
Definition
| incs lt-gathering pwr and reolving pwr |
|
|
Term
| angular res of tels inced by |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| distribution of lt intensity among various colors |
|
|
Term
|
Definition
|
|
Term
| (2)whether plt retains atm deps on |
|
Definition
| temp of atmic gas and plts mass |
|
|
Term
| (4)why does sun appear red at sunset? |
|
Definition
| its close to hor and lt must pass thru longer path in atm, and more blue lt is scattered out of this dir, leaving only red lt |
|
|
Term
| how is mass of plt deted? |
|
Definition
| obs of its Gal infl on an orbiting moon |
|
|
Term
| why does nr fusion req high temps? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| diff.al, meaning =tor rotates faster th poles |
|
|
