Alpha Centauri B is the companion star, or secondary, of the binary system, and is slightly smaller and less luminous than the Sun. It is a main-sequence star of spectral type K1 V, making it more an orange color than the primary star.Alpha Centauri B is about 90% the mass of the Sun and 14% smaller in radius.lpha Centauri (Î± Cen), also known as Rigil Kent (/ËraÉªdÊÉl ËkÉnt/) or Toliman, is the closest star system to the Solar System at 4.37 ly (1.34 pc).
A magnetic resonance angiogram (MRA) is a type of magnetic resonance imaging (MRI) scan that uses a magnetic field and pulses of radio wave energy to provide pictures of blood vessels inside the body.
MRI vs MRA. Magnetic Resonance Imaging, or MRI, is a relatively recent diagnostic tool that uses magnetic fields to create an image of the soft tissues within the body. It is very similar to what X-ray imaging but is more advanced and has the capability to show muscles and other organs. MRA stands for Magnetic Resonance Angiography. It is basically identical to an MRI in technology and basic principles but the techniques are geared to show the movement of blood within the veins and arteries of the body.