Nasa. The HUBBLE telescope observes here a rare type of star - Lot 306

Nasa. The HUBBLE telescope observes here a rare type of star whose atmosphere contains more carbon than oxygen. Because of its low surface gravity, half of the total mass of a carbon star can usually be lost by strong stellar winds. As it begins to run out of fuel, it becomes unstable. Every few thousand years it spits out a nearly spherical envelope of gas when a layer of helium around its core begins to melt. The gas ejected during the star's last eruption is clearly visible in this photo as a faint bubble of gas surrounding the star. Period chromogenic print. Caption on label on the back. 25.5 x 20.4cm with margins. NASA. The Hubble telescope observes here a rare type of star whose atmosphere contains more carbon than oxygen.En due to its low surface gravity, half of the total mass of a carbon star may be lost by generally powerful stellar winds. As it begins to run out of fuel, it becomes unstable. Every few thousand years, it spits out a nearly spherical shell of gas when a layer of helium around its core begins to melt. The gas ejected during the last eruption from the star is clearly visible in this photo as a small bubble of gas surrounding the star. chromogenic draw time. Legend rear label. 25,5 x 20,4cm with margins.