masses of x-ray binary stars

Is it possible to calculate the masses of the stars in an x-ray binary system when all i know of the system is that; one of the stars is a main sequences star of spectral type K5 measured from optical spectroscopy. The companion star is believed to be a neutron star with no distinct pulsations, however the x-ray emission has exhibited erratic and dramitic changes over long periods of time, the last outburst was in 1979 when the luminosity in the x-ray band was estimated to be 4 x 10^30 J s^-1.? a) if it is not possible to calculate the masses of the stars, what would be a reasonable assumed mass for the neutron star? how did you deduce this? b) by considering the energy released in one... click for more

Jupiter what if it disappeared ?

What would happen to jupiters moons if it suddenly disappeared would they collide into each other and form a new planet if not why not

Why is Uranus blue

I know this is because methane absorbs red light but why greenish blue why not bluish green why not some other colour of the spectrum such as violet or orange is this because our eyes are more sensitive to certain colours or because these colours are mixtures with some red in them or another reason

Sun and Milky Way

Describe where our Sun is located in the larger Milky Way.

Differences between planets and stars

Describe the many differences between a star and a planet.