A planet is detected via the Doppler technique. The shape of the ...

[tnt_battle]

A planet is detected via the Doppler technique. The shape of the periodic velocity pattern tells us
 
  A) the planet's size.
  B) the planet's mass.
  C) the planet's density.
  D) the orbital period of the planet.
  E) the orbital eccentricity of the planet.

Question 2

Together, which two gases make up 99 of Jupiter's atmosphere?
 
  A) Ammonia and Methane
  B) Water Vapor and Methane
  C) Helium and Ammonia
  D) Hydrogen and Ammonia
  E) Hydrogen and Helium

[welcom1000]

Answer to Question 1

E

Answer to Question 2

E

[tnt_battle]

Thanks for the timely response, appreciate it

[Joy Chen]

TYSM