Sentences with phrase «outer hydrogen layer»

A Type Ic supernova may be produced by a high - mass star that has blown off much of its outer hydrogen layer while still retaining a significant helium layer, and so it is similar to a Type Ib except that helium is seen in its spectrum.

Type Ib and Ic supernovae result from the collapse of a massive star's core whose outer hydrogen layers have been transfered to a companion star or blown off from strong winds which is why they do not show hydrogen emission lines.

Not exact matches

With no nuclear fusion to sustain them, they collapse into Earth - size balls of tightly bound carbon and oxygen nuclei with an outer layer of hydrogen plasma (disrupted atoms).

The data support the idea that the magnetic field originates from circulating electric currents in one of the planet's outer layers of molecular hydrogen.

The star is losing its hydrogen - filled outer layers quickly, exposing its super-hot and extremely bright helium - burning core.

The star loses its hydrogen - filled outer layers quickly, exposing its super-hot and extremely bright helium - burning core.

When a star runs out of hydrogen fuel its core collapses inward under gravity and, hitting rock bottom, sends out a shockwave that blasts away the star's outer layers as a supernova.

A collision could help answer a puzzling question: Why was SN 2006gy shrouded in hydrogen, when massive stars are supposed to lose their hydrogen - rich outer layer before they explode?

One of three main outer layers that make up the sun's atmosphere, the chromosphere often appears red as superheated hydrogen emits light.

After taking the samples back to the lab, the team sterilized the outside of the rocks, carved away their outer layers, then incubated the exposed samples in 65 °C waters similar to those infiltrating the sea floor at the site — poor in oxygen but rich in chemicals such as dissolved hydrogen, sulfates, acetates, methanol, and dimethyl sulfide.

Hydrogen fusion continues only in the star's outer layers, which causes it to expand.

When stars exhaust their hydrogen fuel the outer layers of the star can expand greatly and the star becomes a giant.

As Vega is so much bigger and hotter than Sol, however, the star will exhaust its core hydrogen after only another 650 million years or so (for a total life of around a billion years) and turn into a red giant or Cepheid variable before puffing away its outer layers to reveal a remnant core as a white dwarf.

Those currents are probably in one of the planet's outer layers of hydrogen.

It may be only about 225 to 250 million years old (Liebert et al, 2005; and Ken Croswell, 2005), but being so much bigger and hotter than Sol, the star will exhaust its core hydrogen within only a billion years and turn into a red giant or Cepheid variable before puffing away its outer layers to reveal a remnant core as a white dwarf.

As the star's outer layer begins to swell from the heat of renewed hydrogen fusion before cooling from expanion, this hydrogen - burning zone moves outward, cools, and shuts down while its underlying of helium begins to fuse in turn.

H. Bond (STSci), R. Ciardullo (PSU), WFPC2, HST, NASA HD 147513 B is a young white dwarf (a remnant stellar core which enriched its binary companion, Star A) with elements heavier than hydrogen when it cast off its outer gas layers) like planetary nebula NGC 2440.

Type II supernovae happen in single star systems (or at least far enough away from any companion star to retain their hydrogen outer layers) and have strong hydrogen emission lines.