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.
It is a red supergiant and one of the largest stars known after Antares. It is about 550 times larger than the Sun and radiates as more than 100 000 suns combined. Aged only a few million years, Betelgeuse is already approaching the end of his life.More massive a star is more the temperature is high at its center.f Betelgeuse were at the center of our solar system, its radius, â 650 times that of the Sun, would extend between the orbit of Mars and Jupiter. Aldebaran is a red giant of magnitude 0.86 and spectral type K5 III, which means it is orange, tall and it left the main sequence after using all its hydrogen.