Plant diseases can be infectious (transmitted from plant to plant) or noninfectious. Noninfectious diseases are usually referred to as disorders. Common plant disorders are caused by deficiencies in plant nutrients, by waterlogged or polluted soil, and by polluted air.
Such refinements in the images of Betelgeuse's atmosphere has been helping to resolve the mystery of how massive amounts of dust and gas are expelled from red supergiant stars, an important source of enrichment for the interstellar medium.
Betelgeuse or Alpha Orionis (Alp Ori) is the 2nd brightest naked eye star in the constellation Orion. With an apparent magnitude of 0.45v, Betelgeuse is the 9th brightest star in the entire sky (see: 50 Brightest Stars ). Its absolute magnitude is -5.14 and its distance is 428 light years. The Equinox J2000 equatorial coordinates are RA = 05h 55m 10.3s, Dec = +07Â° 24' 25.