Space news (March 09, 2016) – deep within the faint northern constellation Vulpecula (The Fox) –
Just one of over 3,000 spectacular planetary nebula astronomers have detected hidden within the Milky Way, the stunningly symmetrical icy blue wings of Hen 2-437 float upon the stars of Vulpecula in the Hubble image above.
Just an icy blue cosmic moth adrift upon a sea of stars, Hen 2-437 is a bipolar nebula similar to hourglass shaped PNHb 12 (Hubble 12) and the stunning M2-9 (The Twin Jet Nebula).
An example of a sun-like star in the final stages of its life cycle, material ejected by the dying star streamed outward into space to create the two icy blue wings of Hen 2-427 seen here.
Sol will one day, billions of years in the future, swell to become a red giant and then expel its gaseous outer layers into space. Shrinking down to form a white dwarf, while ejected material is slowly compressed and pushed outward by stellar winds. The cast off gas streams outward into space to form the two icy blue lobes of Hen 2-437.
Twin iridescent jets of gas stream outward from a binary planetary nebula at over 1 million kilometers (621,400 miles) an hour.
Space news (September 24, 2015) –
First recorded flying across the constellation Ophiuchus – about 2,100 light-years from Earth – by Rudolph Minkowski in 1947, the Twin Jet Nebula (PN M2-9), or Wings of a Butterfly Nebula, is a remarkably complex and stunningly beautiful 1,200-year-old bipolar planetary nebula.
A bipolar nebulacomposed of an average star between 1 to 1.4 solar masses nearing the end of its life cycle and a smaller white dwarf between 0.6 to 1.0 solar masses that orbit a common center of mass. The Twin Jet Nebula gets its name from the shape of its two lobes, which look like butterfly wings to many viewers.
Astrophysicists think the shape of the wings (lobes) is mainly due to the unusual motion of the larger star and white dwarf around their common center of mass. Orbiting each other in around 100 years, the smaller white dwarf is thought to have stripped gas away from its larger companion star, which then formed an expanding ring of material around the starsfar too small to be seen by Hubble.
This disk of material was then stretched into the shape of two lobes resembling two butterfly wings, rather than a uniform sphere, due to the unusual motion of the two stars around their center of mass. The faint patches of blue within the wings, starting near the binary star system and extending outward horizontally, are twin jets of gas streaming outward at over 1 million kilometers an hour.These jets slowly change their orientation, precessing across the lobes (wings) as the two stars orbit each other.
Astrophysicists are now taking a closer look at the Twin Jet Nebula, and other bipolar nebulae, to try to determine if such systems always contain two stars orbiting a common center of mass. Currently, astronomers are discussing this possibility, and other scenarios possibly leading to the birth and growth of similar celestial objects and other phenomena.
Two astronomers working with NASA’s Hubble Space Telescope and the ESO’s New Technology Telescope also recently conducted a study of 130 planetary nebulae. Dr. Brian Rees and Dr. Albert Zijlstra of the University of Manchester in the United Kingdom found the long axis of many bipolar planetary nebulae studied all line up along the plane of the Milky Way. This alignment could have something to do with the magnetic field of the bulge at the center of our galaxy they think. You can read the abstract here.