Answer:Spectroscopy helps astronomers to determine the composition, temperature, density, and motion of an object.
Infrared spectroscopy helps to identify the atoms and molecules in the object.
The red shift or blue shift (Doppler Effect) in a spectral line tells how fast the object is receding from Earth or coming toward it.
The Doppler shift enables astronomers to discover extrasolar planets.
As a planet orbits its star, the star is alternately moving away from or toward us.
Astronomers can use the Doppler shifts to calculate the speed of the star and the mass of the planet that is tugging on it.
Explanation:
Im not sure but B or c. Im sorry
Answer: <span>femoral; crural
In referring location/region you can use proximal or distal. Proximal means closer to the body. It's the opposite of distal that would mean further to the body
Femoral (or thigh) is located nearer to the body than crural (or leg).</span>
form cell membrane
Explanation:
It provides barriers in cellular membranes to protect the cell , and they make barriers for the organelles with in those cells. It work to provide pathways for various substance across membranes
