Leo A

Leo A ( also known as Leo III ) is an irregular galaxy that is part of the Local Group. It lies 2.6 million light-years from Earth. This galaxy was discovered by Fritz Zwicky in 1942. The estimated mass of this galaxy is (8.0 ± 2.7) × 10⁷ solar masses, with at least 80% consisting of an unknown dark matter. It is one of the most isolated galaxies in the local group and shows no indications of an interaction or merger for several billion years. However, Leo A is nearly unique among irregular galaxies in that more than 90% of its stars formed more recently than 8 billion years ago, suggesting a rather unusual evolutionary history. The presence of RR Lyrae variables shows that the galaxy has an old stellar population that is up to 10 billion years in age.

The neutral hydrogen in this galaxy occupies in a volume similar to its optical extent, and is distributed in a squashed, uneven ring. The galaxy is not rotating and the hydrogen is moving about in random clumps. The proportion of elements with higher atomic numbers than helium is only about 1-2% of the ratio in the Sun. This indicates a much less complete conversion of gas into stars than in the Milky Way galaxy. The Leo A galaxy shows sign of increased star formation some time within the last 1-4 billion years, although the current level is low. There are four H II regions powered by short-lived, O-class stars.

Leo

Leo is the Latin word for "lion"

Leo or LEO may refer to:

Common meanings

Science and technology

Geography

Entertainment

Companies

Leo (comics)

Leo is the name of different fictional characters in Marvel Comics.

Publication history

The original Leo first appeared in Avengers #72 (January 1970), and was created by Roy Thomas and Sal Buscema.

The character subsequently appears in Avengers #120-123 (February–May 1974), Ghost Rider #7 (August 1974), Iron Man #184 (July 1984), and West Coast Avengers #26 (November 1987), in which he is killed.

Leo appeared as part of the "Zodiac" entry in the Official Handbook of the Marvel Universe Deluxe Edition #20.

Fictional character biography

Daniel Radford

Daniel Radford is a founding member of the Zodiac, and his base of operations was Los Angeles, California. The Zodiac Cartel was founded by Cornelius van Lunt (Taurus), handpicking the eleven other members; van Lunt concealed his own identity, while he was the only one who knew the identities of the others. Each member was based in a different American city as part of his nationwide criminal network, with the ultimate goal of world economic and political domination.

Léo (footballer, born 1990)

Leonardo da Silva Vieira (born 22 September 1990), known simply as Léo, is a Brazilian professional footballer who plays for São Paulo FC as a goalkeeper.

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