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Antennae Galaxies

The Antennae Galaxies, also known as NGC 4038/NGC 4039, are a pair of interacting galaxies in the constellation Corvus. They are currently going through a starburst phase, in which the collision of clouds of gas and dust, with entangled magnetic fields, causes rapid star formation. They were discovered by William Herschel in 1785. NGC 4038 is located at RA 12^h 01^m 53.0^s, Dec −18° 52′ 10″; and NGC 4039 at RA 12^h 01^m 53.6^s, Dec −18° 53′ 11″.

General information

The Antennae Galaxies are undergoing a galactic collision. Located in the NGC 4038 group with five other galaxies, these two galaxies are known as the Antennae Galaxies because the two long tails of stars, gas and dust ejected from the galaxies as a result of the collision resemble an insect's antennae. The nuclei of the two galaxies are joining to become one giant galaxy. Most galaxies probably undergo at least one significant collision in their lifetimes. This is likely the future of our Milky Way when it collides with the Andromeda Galaxy.

Cat's Eye Nebula

Coordinates: 17^h 58^m 33.423^s, +66° 37′ 59.52″

The Cat's Eye Nebula or NGC 6543, is a relatively bright planetary nebula in the northern constellation of Draco, which was discovered by William Herschel on February 15, 1786. It was notably the first planetary nebula whose spectrum was investigated by the English amateur astronomer William Huggins, demonstrating that planetary nebulae were gaseous and not stellar in nature. Structurally, the object has had high-resolution images by the Hubble Space Telescope revealing knots, jets, bubbles and complex arcs, being illuminated by the central hot planetary nebula nucleus or PNN. It is a well-studied object that has been observed from radio to X-ray wavelengths.

General information

NGC 6543 is a high northern declination deep-sky object and is near the apparent position of the North Ecliptic Pole. It has the combined magnitude of 8.1, with high surface brightness. Its small bright inner nebula subtends an average of 16.1 arcsec, with the outer prominent condensations about 25 arcsec. Deep images reveal an extended halo about 300 arcsec or 5 arcmin across, that was once ejected by the central progenitor star during its red giant phase.

Less (stylesheet language)

Less (sometimes stylized as LESS) is a dynamic style sheet language that can be compiled into Cascading Style Sheets (CSS) and run on the client side or server side. Designed by Alexis Sellier, Less is influenced by Sass and has influenced the newer "SCSS" syntax of Sass, which adapted its CSS-like block formatting syntax. Less is open source. Its first version was written in Ruby; however, in the later versions, use of Ruby has been deprecated and replaced by JavaScript. The indented syntax of Less is a nested metalanguage, as valid CSS is valid Less code with the same semantics. Less provides the following mechanisms: variables, nesting, mixins, operators and functions; the main difference between Less and other CSS precompilers being that Less allows real-time compilation via less.js by the browser.

Variables

Less allows variables to be defined. Variables in Less are defined with an at sign (@). Variable assignment is done with a colon (:).

During translation, the values of the variables are inserted into the output CSS document.

Christian Friedrich Lessing

Christian Friedrich Lessing (10 August 1809 – 13 March 1862) was a German botanist who was a native of Groß Wartenberg, Niederschlesien. He was a brother to painter Carl Friedrich Lessing (1808–1880), and a grandnephew of poet Gotthold Ephraim Lessing (1729–1781).

Lessing was a botanical authority on the plant family Asteraceae, and in 1832 published an influential treatise on Asteraceae called Synopsis generum Compositarum. He performed extensive botanical research in Siberia. In 1862 he was buried in Trinity Cemetery, in the Siberian city of Krasnoyarsk.

The plant genus Lessingia from the family Asteraceae is named in honor of Christian Friedrich, Karl Friedrich and Gotthold Ephraim Lessing.

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References

Less (band)

Less is a band from the San Francisco Bay Area led by the enigmatically-monikered S. Foot. As of 2005, they have released two albums, Piano Wire Smile (2001) and Cover, Protective, Individual (2004), both on the Firecode Core label. Other members have included Brian Lang (drums) and Ben Shamash (bass), the latter of whom went on to form Skyscraper with Andy Slopsema of Sinombre. Foot produced Sinombre's debut album Curves of Sirens.

Debut album Piano Wire Smile saw comparisons with Tool, and Soundgarden, and was described by Sorted magazine as "one of the greatest 'growers' this year". Wrapped In Wire described Less as a "dark heavy rock band", adding that "they could easily become one of the bigger rock bands of today". Second album Cover, Protective, Individual saw the band adding Middle Eastern influences, electronics, and horns, with Left Off The Dial describing it as "a dark, engaging, and musically interesting album", and Splendid Magazine making comparisons with Led Zeppelin and describing the album as a "sonic gem", while Skratch magazine described it as "rich, mysterious, and sobering".