by APOD Robot » Sun Aug 30, 2020 4:06 am
NGC 6357: Cathedral to Massive Stars
Explanation: How massive can a normal star be? Estimates made from distance, brightness and standard
solar models had given one star in the
open cluster Pismis 24 over 200 times the mass of our
Sun, making it one of the most massive stars known. This
star is the brightest object
located just above the gas front in the
featured image. Close inspection of
images taken with the
Hubble Space Telescope, however, have shown that Pismis 24-1 derives its brilliant luminosity
not from a single star but from
three at least.
Component stars would still remain near 100 solar masses, making them among the more
massive stars currently on record. Toward the bottom of the image,
stars are still forming in the associated
emission nebula NGC 6357. Appearing perhaps like a
Gothic cathedral, energetic stars near the center appear to be
breaking out and illuminating a
spectacular cocoon.
[url=https://apod.nasa.gov/apod/ap200830.html] [img]https://apod.nasa.gov/apod/calendar/S_200830.jpg[/img] [size=150]NGC 6357: Cathedral to Massive Stars[/size][/url]
[b] Explanation: [/b] How massive can a normal star be? Estimates made from distance, brightness and standard [url=http://spiff.rit.edu/classes/phys230/lectures/star_age/star_age.html]solar models[/url] had given one star in the [url=https://apod.nasa.gov/apod/open_clusters.html]open cluster[/url] Pismis 24 over 200 times the mass of our [url=https://www.nasa.gov/sun]Sun[/url], making it one of the most massive stars known. This [url=https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve/]star[/url] is the brightest object [url=https://www.youtube.com/watch?v=iLbY7PYzku8]located[/url] just above the gas front in the [url=https://www.spacetelescope.org/news/html/heic0619.html]featured image[/url]. Close inspection of [url=https://hubblesite.org/newscenter/archive/releases/2006/54/image/]images[/url] taken with the [url=https://apod.nasa.gov/apod/ap010806.html]Hubble Space Telescope[/url], however, have shown that Pismis 24-1 derives its brilliant luminosity [url=https://www.spacetelescope.org/news/heic0619/]not from a single star[/url] but from [url=https://ui.adsabs.harvard.edu/abs/2007ApJ...660.1480M/abstract]three[/url] at least. [url=https://apod.nasa.gov/apod/ap160205.html]Component stars[/url] would still remain near 100 solar masses, making them among the more [url=https://en.wikipedia.org/wiki/List_of_most_massive_stars]massive stars[/url] currently on record. Toward the bottom of the image, [url=http://asterisk.apod.com/viewtopic.php?f=24&t=18010]stars[/url] are still forming in the associated [url=https://apod.nasa.gov/apod/emission_nebulae.html]emission nebula[/url] [url=https://apod.nasa.gov/apod/ap081009.html]NGC 6357[/url]. Appearing perhaps like a [url=http://upload.wikimedia.org/wikipedia/commons/6/65/Catedral_Metropolitana_de_Sao_Paulo_1_Brasil-edit-01.jpg]Gothic cathedral[/url], energetic stars near the center appear to be [url=http://cdn.images.express.co.uk/img/dynamic/1/590x/cat-439127.jpg]breaking out[/url] and illuminating a [url=https://apod.nasa.gov/apod/ap150517.html]spectacular cocoon[/url].
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