Cosmology

Question 1

what is the doppler effect

Answer 1

neeerrrrrrowwwwwww

Question 2

if sound had colour what would the doppler effect be

Answer 2

red-shift

Question 3

red-shift equations

Answer 3

if coming towards speed and delta-f are positive
moving away they are negative
(equations on formula sheet)

Question 4

uses of the doppler effect

Answer 4

to calculate
rotational period of stars/planets
orbital period of binary stars

Question 5

what are binary stars

Answer 5

2 stars orbiting around their common center of mass

Question 6

light curves from binary star systems

Answer 6

minimum when stars eclipse each other

Question 7

quasars

Answer 7

are cool

they are also super massive black holes that are eating huge amounts of matter.
they are very red shifted and therefore are moving away from us incredibly fast

Question 8

where is everything going

hint: they don’t like us much

Answer 8

away from us

Question 9

evidence for the big bang

Answer 9

1. The expansion of the universe (cosmological redshift) 
   Hubble’s Law. (ALREADY DISCUSSED)
2. The Cosmic Microwave Background (CMB).
3. The relative abundance of H and He

Question 10

i need an exoplanet and exoplanet is what i need

how could i find one?????????????????????

Answer 10

Transiting exoplanets; looking at light curves

Doppler shift changes in a star; Radial velocity technique