Scorpius(天蝎座).ppt

Scorpius(天蝎座),Scorpius is one of the constellations of the zodiac(黃道十二星座). It lies between Libra(天秤座) to the west and Sagittarius（人馬座） to the east. It is a large constellation located in the southern hemisphere near the center of the Milky Way（銀河）.,Sagittarius,Scorpius,Scorpius contains many bright stars, including Antares (in china we call it 心宿二)( Sco), 1 Sco (Graffias) Most of the bright stars are massive members of the nearest OB association（天蝎人馬天域）.,Antares is a red supergiant star in the Milky Way galaxy and the sixteenth brightest star in the nighttime sky Along with Aldebaran(畢宿五the main star of the Halcyone), Spica（角宿一the main star of the Virgo）, and Regulus（軒轅十四 the main star of the Leo） it is one of the four brightest stars near the ecliptic(黃道) . Antares is a variable star（變星）, whose apparent magnitude（星等） varies from +0.9 to +1.8.,Antares is a class M supergiant star, with a diameter of approximately 700 times that of the sun; if it were placed in the center of our solar system, its outer surface would lie between the orbits(軌道) of Mars and Jupiter. Antares is approximately 600 light-years (180 pc) from our solar system. Its visual luminosity（絕對光度） is about 10,000 times that of the Sun.The mass of the star is calculated to be 15 to 18 solar masses. Its large size and relatively small mass give Antares a very low average density.,Antares,Antares,Deep sky objects,For the scropius locates on the Milky Way, this constellation contains many deep sky objects such as the open clusters Messier(梅西耶星團) 6 (the Butterfly Clustsr) and Messier 7 (the Ptolemy Cluster), and the globular clusters Messier 4 and Messier 80. Also in the southern end of the constellation , there is the open star cluster（疏散星團 ） NGC 6231.,Further details,Further details,Further details,Antera,stinger of Scorpius,NGC 6405,The Butterfly Cluster (cataloged as Messier 6 or M6, and as NGC 6405) is an open cluster of stars in the constellation of Scorpius. Its name derives from the vague resemblance of its shape to a butterfly.,NGC 6475,Messier 7 or M7, also designated NGC 6475 and sometimes known as known as the Ptolemy(托勒密) Cluster, is an open cluster of stars in the constellation of Scorpius. The cluster is easily detectable with the naked eye（肉眼）, close to the “stinger（蜇）“ of Scorpius.,Zoom in,NGC 6231,NGC 6231 is an open cluster This cluster is estimated about 3.2 million years old, and is approaching the Solar System at 22 km/s.,Zoom in,How did these photos be shot?,Fisrt :A DSLR(數碼單反照相機)+a stable tripod + a telescope +,=?,-_- #￥%&（）！？,Second:knowledge of the object you want to shoot and a bit photography skill,1.Make an acurrate light exposure(曝光量) 2.Set iso(感光度) as low as possible 3.Use Photoshop and Photomatix to adjust and composite photos,Third: a good weather and