Timeline Milky Way

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1758        Sep 12, Charles Messier observed the Crab Nebula and began a catalog.
    (MC, 9/12/01)

1959        The new Shane Telescope was installed at the Lick Observatory on Mount Hamilton under director Albert E. Whitford (d.2002 at 96). The Whitford Reddening Curve quantified the interstellar absorption of light and helped map the distribution of stars in the Milky Way.
    (SFC, 4/4/02, p.A19)

1974        A large radio-wave emitting structure was discovered in the galactic center of the Milky Way, a region called the Sagittarius A complex. At its center sits a massive black hole, Sagittarius A*, that controls the motions of the stars in the innermost parsec of the Galaxy.
    (NH, 6/03, p.53)(http://tinyurl.com/ol335c)

1994        May 5, The peak of the Eta Aquarid meteor shower. It displayed 10-40 meteors per hour.
    (PacDis, Spring/'94, p. 40)

1994        The Sagittarius Dwarf Elliptical Galaxy (SagDEG) was recognized by astronomers as a galaxy flying through the Milky Way.
    (SFC, 2/14/98, p.A2)

1997        Apr 29, It was reported that a monster fountain of antimatter was discovered erupting from the core of the Milky Way. Observations from the Compton Gamma Ray Observatory launched by NASA in 1991 made the observations since last November.
    (SFC, 4/29/97, p.A5)

2000        The black hole at the center of the Milky Way was estimated to be 120 million miles in diameter and at least 2.5 million times more massive than our sun. Two stars, S0-1 and S0-2 were located some 60 billion miles from the black hole. The Milky Way circled the black hole every 250 million years.
    (SFC, 9/21/00, p.A7)

2011        Feb 19, Researchers estimated that at least 50 billion planets exist in the Milky Way.
    (SSFC, 2/20/11, p.A9)

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Subject = Milky Way
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