Dying star illuminates its own shroud.This Hubble Space Telescope image, a color composite released this week, depicts a shroud of material jettisoned jettison (jĕt`əsən, –zən) [O.Fr.,=throwing], in maritime law, casting all or part of a ship's cargo overboard to lighten the vessel or to meet some danger, such as fire. Such cargo, when found later, is known as jetsam (see flotsam, jetsam, and ligan). by a central dying star. The cast-off material, known as a planetary nebula 1. a slight corneal opacity. 2. a preparation, particularly an oily preparation, for use in a nebulizer. neb·u·la (n  b y, will seed the cosmos with elements forged in the star's nuclear furnace, some of which have formed into complex organic molecules. This nebula, which surrounds the star Henize 3-401, is the most elongated ever found, notes Pedro Garcia-Lario of rite European Space Agency Arianespace, the first commercial space transportation company and a division of ESA, now conducts more than half of all commercial satellite launches.
The foundation of ESA was laid with the formation of the European Space Research Organization (ESRO) in 1962 and of the European Launcher Development Organization (ELDO) in 1964. in Villafranca, Spain. His studies using light of several wavelengths show no sign of a companion star, which many astronomers suspected may have forced the ejected material to escape as a pair of elongated streamers. Instead, Garcia-Lario suggests that the outflowing material, ionized by Henize 3-401's own radiation, has been channeled by the star's magnetic field. In a few thousand years, the star will exhaust its fuel and become a compact ember known as a white dwarf white dwarf, in astronomy, a type of star that is abnormally faint for its white-hot temperature (see mass-luminosity relation). Typically, a white dwarf star has the mass of the sun and the radius of the earth but does not emit enough light or other radiation to be easily detected. The existence of white dwarfs is intimately connected with stellar evolution. A white dwarf is the hot core of a star, left over after the star uses up its nuclear fuel and dies.. |
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