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LEO THE LION A Spring Constellation

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  • LEO THE LION

    A Spring Constellation

  • LEO CONSTELLATION

    12th largest constellation in size

    One of the zodiac constellations sun passes through : Aug 10th to Sep 16th

    Contains five Messier objects and 11 stars with known planets

    Two meteor showers: Leonids 17-18 Nov & Jan 1-7

    Diagram Wikipedia

  • MYTHOLOGY

    One of oldest constellations, traced back 4,000 BC Mesopotamians

    Catalogued by the Greek astronomer Ptolemy in 2nd century

    Greeks depicted Leo as the Nemean Lion, killed by Hercules as the first of his twelve labors

  • LOCATING LEO

    Messier Marathon Field Guide

  • MAJOR STARS IN LEO

    Algieba (Gamma Leonis) lions neck; double star visible in small scopes; 126 ly distant

    Regulus (Alpha Leonis) lions heart; brightest star in Leo and 22nd brightest in sky; composed of two pairs of stars; 77 ly distant Denebola - (Beta Leonis) - tip of the lions tail; 2nd

    brightest star in Leo and 61st brightest in sky; relatively young star and fast rotator; strong infrared excess suggests circumstellar disc of dust in orbit

    Zosma (Delta Leonis) lions rump; white main sequence star; rapid rotator

    NightWatch

  • MESSIER OBJECTS IN LEO

    M65 (NGC 3623) intermediate spiral galaxy; 35 million ly distant most stars are old

    M66 (NGC 3627) intermediate spiral galaxy; 36 million ly distant; notable for dust lanes and bright star clusters

    M65-M66-NGC 3628 by Gary Garzone

    Photos by Gary Garzone

    Leo Triplet

  • MESSIER OBJECTS IN LEO

    M95 (NGC 3351) barred spiral galaxy; 38 million ly distant; ringshaped starburst region around the core

    M96 (NGC 3368) intermediate spiral galaxy; 31 million ly distant; Double-barred spiral with small inner bulge

    M105 (NGC 3379) elliptical galaxy; 32 million ly distant; known to have a supermassive black hole at its center

    Brian Kimball photo

    NASA/ESA

    ESO

  • ALSO WORTH VIEWING

    From Bob Stohls series of talks on Messier objects M44 photo by Brian Kimball

  • TAKE A LOOK AT LEO

    Easy to find zodiac constellation

    Great mythological story

    Contains five Messier objects and multiple interesting stars

    Easy star hop to Cancer, Gemini, Auriga

    Two meteor showers: Leonids 17-18 Nov & Jan 1-7