Mz 3 ( Menzel 3 ) is a young bipolar planetary nebula in the constellation Norma that is composed of a bright core and four distinct high-velocity outflows that have been named lobes, columns, rays, and chakram.

Mz 3 is a complex system composed of three nested pairs of bipolar lobes and an equatorial ellipse.

Mz 3 is often referred to as the Ant Nebula because it resembles the head and thorax of a garden-variety ant.

Mz 3 is radially expanding at a rate of about 50 km / s and has its polar axis oriented at an angle of around 30 ° from the plane of the sky ( Lopez & Meaburn 1983 ; Meaburn & Walsh 1985 ).

Mz 3 has no trace of molecular hydrogen emission, whereas the M 2-9 has prominent H < sub > 2 </ sub > emission lines in the near-IR.

The lack of H < sub > 2 </ sub > emissions from Mz 3 is unusual given the strong correlation between such emissions and bipolar structures of PN.

Additionally, the polar lobes of Mz 3 are more mottled and rounded as compared to M 2-9.

Finally, Mz 3 is not known to evidence temporal variability in its polar lobes as is found in M 2-9 ( Doyle et al.

Of the morphological features of Mz 3, one of the most unusual and odd is the chakram ( first noticed in 2004 ), a faint, large, limb brightened ellipse that appears to have its center on the PN's nucleus.

Unlike all the other Mz 3 structures, there is no increase of velocity as the radial offset from the nucleus increases.

All the kinematic properties of the ellipse are symmetric and very ordered relative to the nucleus, consistent with all the other Mz 3 features.

* NASA APOD-Planetary Nebula Mz 3: The Ant Nebula

< li > Mz 3 has several components with varying degrees of collimation.

tr: Mz 3

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In linear algebra, a symmetric real matrix M is said to be positive definite if z < sup > T </ sup > Mz is positive, for all non-zero column vectors z of n real numbers ; where z < sup > T </ sup > denotes the transpose of z.

More generally, an complex matrix M is said to be positive definite if z < sup >*</ sup > Mz is real and positive for all non-zero complex vectors z ; where z < sup >*</ sup > denotes the conjugate transpose of z.

The negative definite, positive semi-definite, and negative semi-definite matrices are defined in the same way, except that the formula z < sup > T </ sup > Mz or z < sup >*</ sup > Mz is required to be always negative, non-negative, and non-positive, respectively.

The matrix M may be regarded as a diagonal matrix D that has been re-expressed in coordinates of the basis P. In particular, the one-to-one change of variable y = Pz shows that z < sup >*</ sup > Mz is real and positive for any complex vector z if and only if y < sup >*</ sup > Dy is real and positive for any y '; in other words, if D is positive definite.

* Mz., an alternate spelling of Ms.

* Anemia cajalbanica Borhidi & Mz.

moaensis Borhidi & Mz.

Ms .( Mz.

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Also misleading can be the use of B for a Baritone part or S for an Mz part as for example in Stanford's motet " Eternal Father " which, though marked SSATBB, is for one each of soprano, mezzo-soprano, alto, tenor, baritone and bass.

ur: Mz.

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Their study showed that it was possible to transfer 3 to 4 lb of oxygen / hr. / hp.

World production of copra, the oil-bearing flesh of the coconut, was a little more than 3 million tons in 1959.

Cecil Mason of Hartford, Conn., was best man for his brother, and groomsmen were Rhodes S. Baker 3, of Houston, Dr. James Carter of Houston and Conrad McEachern of New Orleans, La..

The defendant, William L. Stickney 3, 23, of 3211 Park pl., Evanston, who pleaded guilty to reckless driving, also was ordered by Judge James Corcoran to attend the Evanston traffic school each Tuesday night for one month.

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Allan Dwan ( April 3, 1885 – December 28, 1981 ) was a pioneering Canadian-born American motion picture director, producer and screenwriter.

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