Showing posts tagged Space

Magellanic Cloud galaxies and the Milky Way seen above the Salar de Atacama salt flat (and reflected in the Laguna Cejar) in northern Chile (12-image mosaic panorama by Alex Tudorica)

Magellanic Cloud galaxies and the Milky Way seen above the Salar de Atacama salt flat (and reflected in the Laguna Cejar) in northern Chile (12-image mosaic panorama by Alex Tudorica)

ohstarstuff:

The Colorful Demise of a Sun-like Star
This Hubble Space Telescope image shows planetary nebula NGC 2440 with a star very similar to our Sun reaching the end of its life. The star is casting off its outer layers of gas, which formed a cocoon around the star’s remaining core. Ultraviolet light from the dying star makes the material glow. The burned-out star, called a white dwarf, is the white dot in the center. The white dwarf is one of the hottest known, with a surface temperature of nearly 400,000 degrees Fahrenheit (200,000 degrees Celsius). The nebula’s chaotic structure suggests that the star shed its mass episodically. During each outburst, the star expelled material in a different direction. This can be seen in the two bow tie-shaped lobes. Our Sun will eventually burn out and shroud itself with stellar debris as well, but luckily not for another 5 billion years. 
(Credit: NASA, ESA, and K. Noll (STScI)

ohstarstuff:

The Colorful Demise of a Sun-like Star


This Hubble Space Telescope image shows planetary nebula NGC 2440 with a star very similar to our Sun reaching the end of its life. The star is casting off its outer layers of gas, which formed a cocoon around the star’s remaining core. Ultraviolet light from the dying star makes the material glow. The burned-out star, called a white dwarf, is the white dot in the center. The white dwarf is one of the hottest known, with a surface temperature of nearly 400,000 degrees Fahrenheit (200,000 degrees Celsius).

The nebula’s chaotic structure suggests that the star shed its mass episodically. During each outburst, the star expelled material in a different direction. This can be seen in the two bow tie-shaped lobes. Our Sun will eventually burn out and shroud itself with stellar debris as well, but luckily not for another 5 billion years.

(Credit: NASA, ESA, and K. Noll (STScI)