Image: Hubble frames a unique red rectangle

Hubble frames a unique red rectangle
Credit: ESA/Hubble and NASA

The star HD 44179 is surrounded by an extraordinary structure known as the Red Rectangle. It acquired its moniker because of its shape and its apparent color when seen in early images from Earth. This strikingly detailed Hubble image reveals how, when seen from space, the nebula, rather than being rectangular, is shaped like an X with additional complex structures of spaced lines of glowing gas, a little like the rungs of a ladder.

The star at the center is similar to the sun, but at the end of its lifetime, pumping out gas and other material to make the nebula, and giving it the distinctive shape. It also appears that the star is a close binary that is surrounded by a dense area of dust—both of which may help to explain the very curious shape.

The Red Rectangle is an unusual example of what is known as a proto-planetary nebula. These are old , on their way to becoming planetary nebulae. Once the expulsion of mass is complete a very hot white dwarf star will remain and its brilliant ultraviolet radiation will cause the surrounding gas to glow. The Red Rectangle is found about 2,300 light-years away in the constellation Monoceros (the Unicorn).

The High Resolution Channel of the NASA/ESA Hubble Space Telescope's Advanced Camera for Surveys captured this view of HD 44179 and the surrounding Red Rectangle nebula—the sharpest view so far. Red light from glowing Hydrogen was captured through the F658N filter and colored red. Orange-red light over a wider range of wavelengths through a F625W filter was colored blue. The field of view is about 25 by 20 arcseconds.


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Apr 11, 2016
A new star is born. Beautiful!

Apr 11, 2016
A new star is born. Beautiful!


That's a good theory, but the scientists that found it seem to disagree with you. It's a really old star that's about to be at the end of his life.

Apr 12, 2016
It really looks like a lensing effect. It could be due to the density of the surrounding gas has a kind of ordered structure.

Apr 12, 2016
Nature's z-pinched Birkeland current.

And yes, most likely a star is born.

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