Tag Archives: Hydra

Southern Pinwheel Galaxy

0fe1d7fbf6677356180ef47601a7f9e8.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Chad Quandt
Messier 83 (also known as the Southern Pinwheel GalaxyM83 or NGC 5236) is a barred spiral galaxy approximately 15 millionlight-years away in the constellation Hydra. It is one of the closest and brightest barred spiral galaxies in the sky, making it visible withbinoculars. Six supernovae (SN 1923ASN 1945BSN 1950BSN 1957DSN 1968L and SN 1983N) have been observed in M83.
Nicolas Louis de Lacaille discovered M83 on February 23, 1752 at the Cape of Good Hope. Charles Messier added it to his catalogue of nebulous objects (now known as the Messier Catalogue) in March 1781.
On 16 June 2008 NASA’s Galaxy Evolution Explorer project reported finding large numbers of new stars in the outer reaches of the galaxy. It had hitherto been thought that these areas lacked the materials necessary for star formation.

Imaging telescopes or lenses: Takahashi TSA120
Imaging cameras: Canon 60Da
Mounts: Software Bisque Paramount MX
Guiding telescopes or lenses: Astro-Tech AT72ED
Guiding cameras: SBIG ST-i Mono
Software: Adobe Photoshop CS4, Deep Sky Stacker, Software Bisque The Sky X Pro
Accessories: Astro Tech ATFF
Dates: June 7, 2013
Frames: 48×300″
Integration: 4.0 hours

Author: Chad Quandt
AstroPhotography of the day by SPONLI 07 June 2014

Spiral Galaxy M83: The Southern Pinwheel

Image Credit: NASA, ESA, Hubble Heritage Team (STScI/AURA), and W. P. Blair (JHU) et al.

M83 is one of the closest and brightest spiral galaxies on the sky. Visible with binoculars in the constellation of Hydra, majestic spiral arms have prompted its nickname as the Southern Pinwheel. Although discovered 250 years ago, only much later was it appreciated that M83 was not a nearby gas cloud, but a barred spiral galaxy much like our own Milky Way Galaxy. M83, pictured above by the Hubble Space Telescope in a recently released image, is a prominent member of a group of galaxies that includes Centaurus A and NGC 5253, all of which lie about 15 million light years distant. Several bright supernova explosions have been recorded in M83. An intriguing double circumnuclear ring has been discovered at the center of of M83.

M83 Star Streams

Image Credit & Copyright: R. Gendler, D. Martinez-Delgado (ARI-ZAH, Univ. Heidelberg) D. Malin (AAO),
NAOJ, ESO, HLA – Assembly and Processing: Robert Gendler

Explanation: Big, bright, and beautiful, spiral galaxy M83 lies a mere twelve million light-years away, near the southeastern tip of the very long constellation Hydra. This deep view of the gorgeous island universe includes observations from Hubble, along with ground based data from the European Southern Observatory’s very large telescope units, National Astronomical Observatory of Japan’s Subaru telescope, and Australian Astronomical Observatory photographic data by D. Malin. About 40,000 light-years across, M83 is popularly known as the Southern Pinwheel for its pronounced spiral arms. But the wealth of reddish star forming regions found near the edges of the arms’ thick dust lanes, also suggest another popular moniker for M83, the Thousand-Ruby Galaxy. Arcing near the top of the novel cosmic portrait lies M83’s northern stellar tidal stream, debris from the gravitational disruption of a smaller, merging satellite galaxy. The faint, elusive star stream was found in the mid 1990s by enhancing photographic plates.
NASA APOD 17-ene-2014