A chalazion is a small bump that appears on your eyelid because of a blocked oil gland.It can develop on the lower or upper eyelid, and it often disappears without treatment in about one month. chalazion is a small bump that appears on your eyelid because of a blocked oil gland.
Artist's conception of a white dwarf accreting hydrogen from a larger companion. A nova (plural novae or novas) is a cataclysmic nuclear explosion on a white dwarf, which causes a sudden brightening of the star.Novae are not to be confused with other brightening phenomena such as supernovae or luminous red novae.he recurrence interval for a nova is less dependent on the white dwarf's accretion rate than on its mass; with their powerful gravity, massive white dwarfs require less accretion to fuel an outburst than lower-mass ones.
Best Answer: A complete virus particle, known as a virion, consists of nucleic acid surrounded by a protective coat of protein called a capsid.These are formed from identical protein subunits called capsomers.[53] Viruses can have a lipid envelope derived from the host cell membrane.The capsid is made from proteins encoded by the viral genome and its shape serves as the basis for morphological distinction.hese are formed from identical protein subunits called capsomers.[53] Viruses can have a lipid envelope derived from the host cell membrane. The capsid is made from proteins encoded by the viral genome and its shape serves as the basis for morphological distinction.