martinsastro

Astronomy for all.
Image search results - "47tuc"
47Tucdone2G.jpg
47Tucdone2G.jpg47Tucanae272 views47 Tucanae (NGC 104) or just 47 Tuc is a globular cluster located in the constellation Tucana. It is about 16,700 light years away from Earth, and 120 light years across. It can be seen with the naked eye, with a visual magnitude of 4.0. It's number comes not from the Flamsteed catalogue, but the more obscure 1801 "Allgemeine Beschreibung und Nachweisung der Gestirne nebst Verzeichniss" compiled by Johann Elert Bode.

47 Tucanae was discovered by Nicolas Louis de Lacaille in 1751, its southern location having hidden it from European observers until then. The cluster appears roughly the size of the full moon in the sky under ideal conditions.

It is the second brightest globular cluster in the sky (after Omega Centauri), and is noted for having a very bright and dense core. It has 23 known millisecond pulsars, and at least 21 blue stragglers near the core.
Martin
47Tucmoreblue2Gig.jpg
47Tucmoreblue2Gig.jpg47tuc270 viewsfor Trevor :)Martin
47Tucreprocessed2Gig.jpg
47Tucreprocessed2Gig.jpg47Tucanae333 viewsThis is an reprocess and has an less green back ground, also the starcolors look better to me.Martin
 
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