Page 1 of 1

Lulin, Saturn & Shishimai (APOD 2009 February 27)

Posted: Fri Feb 27, 2009 4:44 pm
by neufer
http://apod.nasa.gov/apod/ap090227.html

Image
---------------------------------------------
Sigma Leonis is a blue-white fourth-magnitude star in the constellation Leo,
sometimes called by the Japanese name Shishimai.

Sigma Leonis is of the spectral class B9.5V s and has an apparent magnitude of +4.05.
---------------------------------------------
http://www.youtube.com/watch?v=0jKJaGVlUKk
---------------------------------------------
http://en.wikipedia.org/wiki/Leo_(constellation) wrote:
<<Leo has been represented as a lion by numerous civilizations for thousands of years. One explanation is that the Sun was among its stars in Midsummer, and during this time the lions of the Egyptian desert left their accustomed haunts for the banks of the Nile, where they could find relief from the heat in the waters of the inundation. Pliny wrote that the Egyptians worshipped the stars of Leo because the rise of their great river was coincident with the Sun's entrance among them. Distinct reference is made to Leo in an inscription of the walls of the Ramesseum at Thebes, which, like the Nile temples generally, was adorned with the animal's bristles, while on the planisphere of Dendera its figure is shown standing on an outstretched serpent. The Egyptian stellar Lion, however, comprised only a part of the modern constellation, and in the earliest records some of its stars were shown as a knife, whereas they now are as a sickle. Kircher gave its title there as Πιμεντεκεων, Cubitus Nili.

The Persians called Leo Ser or Shir; the Turks, Artan; the Syrians, Aryo; the Jewish, Arye; the Indians, "Sher"; and the Babylonians, Aru — all meaning a lion. In Euphratean astronomy it was additionally known as Gisbar-namru-sa-pan, variously translated, but by Bertin, as the Shining Disc which precedes Bel, "Bel" being our Ursa Major, or in some way intimately connected therewith.

In Greek mythology, it was identified as the Nemean Lion which was killed by Hercules during one of his twelve labours, and subsequently put into the sky. The Roman poet Ovid called it Herculeus Leo and Violentus Leo. Bacchi Sidus (Star of Bacchus) was another of its titles, the god Bacchus always being identified with this animal.>>
---------------------------------------------

Lulin vs. the Borg Cube at CN Leonis

Posted: Fri Feb 27, 2009 5:25 pm
by neufer
---------------------------------
Lulin vs. the Borg Cube at CN Leonis
---------------------------------
<<Wolf 359 (CN Leonis) is an extremely faint red dwarf is the third closest to Sol after Alpha Centauri 3 and Barnard's Star. It is located only about 7.8 light-years away south of Chertan or Coxa (Theta Leonis) and was discovered photographically by Max Wolf (1863-1932), a pioneer of astrophotography who discovered hundreds of variable stars and asteroids, and about 5,000 nebulae by analyzing photographic plates and developing the "dry plate" in 1880 and the "blink comparator" in 1900 with the Carl Zeiss optics company in Jena, Germany.
---------------------------------
<<In "The Battle of Wolf 359 (Star Trek: The Next Generation)", 40 Starfleet starships gather near Wolf 359 to intercept a Borg cube ship traveling to Earth. The Borg, having assimilated Captain Jean-Luc Picard (Patrick Stewart) and his knowledge of Starfleet tactics and technology into its collective consciousness, obliterate the Starfleet force: according to dialog in "The Drumhead", 39 ships are destroyed, with the loss of over 11,000 lives. Following its victory, the Borg ship continues on its course to Earth, where the crew of the Enterprise-D rescue Picard and stop the cube.>>
---------------------------------
<<Wolf 359 is classified as a UV Ceti-type flare star, and has a relatively high flare rate. Observations with the Hubble Space Telescope (HST) detected 32 flare events within a two hour period, with energies of 1027 ergs (1020 joules) and higher. The mean magnetic field has a strength of about 2.2 kG, but this varies significantly on time scales as short as six hours. By comparison, the magnetic field of the Sun averages 1 Gauss, although it can rise as high as 3 kG in active sunspot regions.>>
---------------------------------------------

COMET LULIN

Posted: Fri Feb 27, 2009 9:27 pm
by Alibali
:oops: Hi i feel a bit of a complete beginner with all this language stuff going on but i have to comment on this beautiful comet, looking through marine binoc's in the North East of Scotland Lulin looks to be shaped like a bird tonight. Wow is nature not special? the sky is is a magnificient spectacle at night. new member Alibali

Re: Lulin, Saturn & Shishimai (APOD 2009 February 27)

Posted: Fri Feb 27, 2009 11:51 pm
by apodman
neufer wrote:Sigma Leonis is a blue-white fourth-magnitude star in the constellation Leo,
sometimes called by the Japanese name Shishimai.

Sigma Leonis is of the spectral class B9.5V s and has an apparent magnitude of +4.05.
Here's a recent Sigma Leonis post I made:

http://asterisk.apod.com/vie ... 504#p99504

And the accompanying APOD:

http://antwrp.gsfc.nasa.gov/apod/ap081214.html

And a couple of links I included in that post:

http://antwrp.gsfc.nasa.gov/cgi-bin/apo ... leo+planet

http://antwrp.gsfc.nasa.gov/apod/ap070407.html

Re: Lulin, Saturn & Shishimai (APOD 2009 February 27)

Posted: Sat Feb 28, 2009 2:34 pm
by neufer
apodman wrote:
neufer wrote:Sigma Leonis is a blue-white fourth-magnitude star in the constellation Leo,
sometimes called by the Japanese name Shishimai.

Sigma Leonis is of the spectral class B9.5V s and has an apparent magnitude of +4.05.
Here's a recent Sigma Leonis post I made:

http://asterisk.apod.com/vie ... 504#p99504
I sometimes have to remind myself that (over time periods of the order of months) the most dramatic movement of planets beyond the earth is actually caused by the earth's own movement (especially when these objects are at opposition). This time of year the planets in Leo are doing a Shishimai dance.