Star Clusters Of NGC 1313

a study in catstronomy filed under: things the government doesn’t want us to know

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the wish

by Denny Bitte

Dream galaxy

Helix Nebula in Visible and in Infrared Light

The Helix Nebula, also known as NGC 7293, is a large planetary nebula (PN) located in the constellation Aquarius. Planetary nebulae like the Helix are sculpted late in a Sun-like star’s life by a torrential gush of gases escaping from the dying star. They have nothing to do with planet formation, but got their name because they look like planetary disks when viewed through a small telescope.

Credit: ESO/VISTA/J. Emerson.

NASA Astronomy Picture of the Day 2015 June 23

Sharpless 308: Star Bubble 

Blown by fast winds from a hot, massive star, this cosmic bubble is huge. Cataloged as Sharpless 2-308 it lies some 5,200 light-years away toward the constellation of the Big Dog (Canis Major) and covers slightly more of the sky than a Full Moon. That corresponds to a diameter of 60 light-years at its estimated distance. The massive star that created the bubble, a Wolf-Rayet star, is the bright one near the center of the nebula. Wolf-Rayet stars have over 20 times the mass of the Sun and are thought to be in a brief, pre-supernova phase of massive star evolution. Fast winds from this Wolf-Rayet star create the bubble-shaped nebula as they sweep up slower moving material from an earlier phase of evolution. The windblown nebula has an age of about 70,000 years. Relatively faint emission captured in the expansive image is dominated by the glow of ionized oxygen atoms mapped to a blue hue.

LMS - HEX -by `adonihs