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NGC 2359, better known as the Thor's Helmet nebula, is actually more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center sweeps through a surrounding molecular cloud. The central star is an extremely hot giant Wolf-Rayet star, thought to be in a brief, pre-supernova stage of evolution. It lies about 15,000 light years from Earth in the constellation Canis Major, measuring about 30 light years.

Thor's Helmet nebula is actually more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center sweeps through a surrounding molecular cloud. The central star is an extremely hot giant Wolf-Rayet star, though

This view across 24,000 light years of the Milky Way Galaxy shows over 150,000 stars!

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. - Albert Einstein (This view across light years of the Milky Way Galaxy shows over stars!

Stephan’s Quintet – 300,000,000 light years away

Galactic Wreckage in Stephan's Quintet - A clash among members of a famous galaxy quintet reveals an assortment of stars across a wide color range, from young, blue stars to aging, red stars. This group is also known as the Hickson Compact Group 92

Mysterious Owl Nebula - Gemini North image of the planetary nebula M97, the approximately 6,000 year-old nebula is located about 2,600 light-years away, and has a diameter of about three light-years across. It is located in the constellation of Ursa Major (which contains the Big Dipper).

Owl Nebula Wins Student's Choice Photo Contest - Gemini North image of the planetary nebula also known as the Owl Nebula, imaged by the Gemini Multi-Object Spectrograph (GMOS) as part of a Canadian contest for high school

The strikingly unusual planetary nebula, NGC 6751.  Glowing in the constellation Aquila like a giant eye, the nebula is a cloud of gas ejected several thousand years ago from the hot star visible in its center.

The strikingly unusual planetary nebula, NGC Glowing in the constellation Aquila like a giant eye, the nebula is a cloud of gas ejected several thousand years ago from the hot star visible in its center. Photos Of Space From The Hubble Telescope

The Butterfly Nebula is a planetary nebula in the constellation Scorpius. It lies about 2,000 light years away and is itself about 2 light years across. Scientists believe this was once quite a massive star, around 5 times that of the Sun, as the white dwarf that remains in the center is one of the hottest starts in the galaxy.

Butterfly Nebula - gas released by a dying star racing across space at more than miles an hour, forming the delicate shape of a celestial butterfly. Also known as NGC 6302 or the Bug Nebula. Credit: NASA, ESA, and the Hubble ERO Team