Description. Alprazolam (Xanax) is a benzodiazepine used to treat anxiety and panic disorder. Benzodiazepines are used to relieve anxiety, nervousness, or tension. Benzodiazepines should not be used for anxiety, nervousness, or tension caused by the stress of everyday life.
Binary Stars. Spica. Spica, Alpha Virginis, is the brightest star in the southern constellation Virgo and the 16th brightest star in the sky. It is a blue subgiant star located at a distance of 262 light years from Earth. Spica is really a close binary star system.
1 The nearest star beyond the Sun, Alpha Centauri, has a magnitude of zero. 2  Sirius, the brightest star besides the sun, has a magnitude of -1.4. 3  Venus at its brightest has a magnitude of -4.  A crescent Moon is about magnitude -8, the full Moon about -12.