An Eclipsing Extrasolar Planet. Extrasolar Planets! - very dim - almost impossible to see (think...
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Transcript of An Eclipsing Extrasolar Planet. Extrasolar Planets! - very dim - almost impossible to see (think...
An Eclipsing Extrasolar Planet
Extrasolar Planets!
- very dim - almost impossible to see (think floodlight vs. glow-in-the-dark watch)
Extrasolar Planets!
- very dim - almost impossible to see (think floodlight vs. glow-in-the-dark watch)
- easier to detect by looking at a star’s “wobble”
Center of Mass
Same mass; center of mass is in the middle.
Balance point is halfway between us.
Center of Mass
Center of mass (or, the balance point) is closer tothe more massive one.
Center of Mass
Center of mass (or, the balance point) is closer tothe more massive one.
Doppler Shift
Fire truck standing still Fire truck moving
The pitch of the moving truck's siren appears to change as it approaches and then passes us because the
waves get squished and then spread out.
Doppler Shift
Things moving toward usThings moving toward usare blue shifted.are blue shifted.
Things moving away from usThings moving away from usare red shifted.are red shifted.
Doppler Shift
Things moving toward usThings moving toward usare blue shifted.are blue shifted.
Things moving away from usThings moving away from usare red shifted.are red shifted.
Doppler Shift
Doppler Shift
- cops use it to tell how fast you're driving
Doppler Shift
- cops use it to tell how fast you're driving
- coaches use it to see how fast you're pitching
Doppler Shift
- astronomers use it to measure how much a star is wobbling!
Doppler Shift
- astronomers use it to measure how much a star is wobbling!
Doppler Shift
- watch out for inclination...
Inclination and Transits
- if we see a transit, we know it's close to edge-on
Starlight we can see:
1) 100% 2) ~99.5% 3) ~99.0%
p2 = a3
p is in years, a is in AU
__ days x 1 yr/365 days = __ yrs
(planet’s area) / (star’s area) = % light blocked
Just a little reminder...
100%99%