by APOD Robot » Sat Mar 26, 2011 4:14 am
T Tauri and Hind's Variable Nebula
Explanation: The yellowish star near center in this remarkable
telescopic skyview is T Tauri, prototype of the class of
T Tauri variable stars. Nearby it is a dusty yellow cosmic cloud
historically known as Hind's Variable Nebula (NGC 1555). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula
are seen to vary significantly in brightness but not necessarily at the same time, adding to the mystery of the intriguing region. T Tauri stars are now generally recognized as young (less than a few million years old), sun-like stars still in the
early stages of
formation. To
further complicate the picture, infrared observations indicate that T Tauri itself is part of a multiple system and suggest that the associated
Hind's Nebula may also contain a very young stellar object. The naturally colored image spans about 4 light-years at the estimated
distance of T Tauri.
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[url=http://apod.nasa.gov/apod/ap110326.html][img]http://apod.nasa.gov/apod/calendar/S_110326.jpg[/img] [size=150]T Tauri and Hind's Variable Nebula[/size][/url]
[b] Explanation: [/b] The yellowish star near center in this remarkable [url=http://www.caelumobservatory.com/gallery/n1555.shtml]telescopic skyview[/url] is T Tauri, prototype of the class of [url=http://www.aavso.org/vsots_ttau]T Tauri variable[/url] stars. Nearby it is a dusty yellow cosmic cloud [url=http://adsabs.harvard.edu/doi/10.1086/145232]historically[/url] known as Hind's Variable Nebula (NGC 1555). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula [url=http://mira.aavso.org/pipermail/aavso-discussion/2004-December/011285.html]are seen[/url] to vary significantly in brightness but not necessarily at the same time, adding to the mystery of the intriguing region. T Tauri stars are now generally recognized as young (less than a few million years old), sun-like stars still in the [url=http://hyperphysics.phy-astr.gsu.edu/hbase/astro/gravc.html]early[/url] stages of [url=http://archive.ncsa.uiuc.edu/Cyberia/Bima/StarForm.html]formation[/url]. To [url=http://arxiv.org/abs/astro-ph/0406337]further[/url] complicate the picture, infrared observations indicate that T Tauri itself is part of a multiple system and suggest that the associated [url=http://www.daviddarling.info/encyclopedia/H/Hind.html]Hind's[/url] Nebula may also contain a very young stellar object. The naturally colored image spans about 4 light-years at the estimated [url=http://www.astronomy.com/asy/default.aspx?c=a&id=2765]distance of T Tauri[/url].
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