Astronomy | Astrophysics Answers

Express the radius of the Earth in unit of solar radius. (Radius of the earth is 6.4 x 10^6m).

Explain why at one time, the steady state theory appeared necessary. What is its status now?

What part of the Milky Way allows for determination of its rotational direction?

A. Galactic disk
B. Celestial body
C. Two long tails
D. Galactic body

The average energy of particles in the early phase of the universe, when it was very
hot, was approximately 10 GeV. Calculate the corresponding temperature.

Explain why at one time, the steady state theory appeared necessary. What is its status now?

Explain why we expect the gas is elliptical galaxies to be hot ?for 5 marks

Explain why at one time, the steady state theory appeared necessary. What is its status now?

What is the difference between the HII region and HI region of the interstellar medium? Explain the process involved in the detection of HI region in the ISM.

What is thermodynamics?

You are the captain of a spaceship that is circling through a binary star system. Due to the gravitational forces and the rocket engines, the orbit of your spaceship looks like that:

The position of your spaceship (in AU) at the time t (in days) is given by:
x= 5sin(t) y= sin(2t) z= 0
a) How long does it take your spaceship to circle the orbit once?
b) Find an equation that calculates the velocity v(t) of your spaceship at a given time t.
c) The two stars are positioned at the points (4,0,0) and (-4,0,0): what is the distance of your spaceship to the stars at the time t = π/2 ?