by Ann » Mon May 25, 2020 9:02 am
The Mystic Mountain with hidden young stars emitting jets.
Looks like there is more than one set of jets in the Mystic Mountain in the APOD.
The stars being born in the Mystic Mountain strikes me as typical triggered formation of second generation stars. These stars form at the top of pillars, which are being compressed and eroded away by the strong stellar wind and onslaught of ultraviolet light of pre-existing massive stars. Good examples are just like the stars forming at the top of the
Cone Nebula, at the top of the
Horsehead Nebula or at the top of one of the
Pillars of Creation.
High-mass "first generation" stars form differently, I think. I like the picture of the cosmic Snake at right.
NASA wrote:
The Snake: With a name inspired by its serpentine shape, this extremely filamentary cloud is about 12,000 light-years away with a total mass of 100,000 Suns. Scattered along the Snake are warm, dense dust clouds, each containing about 1,000 times the mass of the Sun in gas and dust. These clouds are being heated by young, massive stars forming inside of them.
The Snake may be a section of a much longer filament that is a “Bone of the Milky Way,” tracing out the galaxy’s spiral structure.
Speaking of triggered star formation: I love this little "nebula-man" in the Pillars of Creation. This little guy looks like he is balancing a lit candle on his cheek or nose, near his eye. "The flame of the candle", of course, must be a new-born low-mass star, and the "candle" itself must be a small starforming dusty pillar.
Ann
[float=left][attachment=1]Mystic Mountain with arrows.png[/attachment][c][size=85]The Mystic Mountain with hidden young stars emitting jets.[/size][/c][/float] [float=right][img3="The Snake is a serpentine-shaped, extremely filamentary cloud giving birth to massive stars. Infrared image from the Spitzer Space Telescope."]https://scx2.b-cdn.net/gfx/news/hires/2020/piercingthed.jpg[/img3][/float]
Looks like there is more than one set of jets in the Mystic Mountain in the APOD.
The stars being born in the Mystic Mountain strikes me as typical triggered formation of second generation stars. These stars form at the top of pillars, which are being compressed and eroded away by the strong stellar wind and onslaught of ultraviolet light of pre-existing massive stars. Good examples are just like the stars forming at the top of the [url=https://i.pinimg.com/originals/9c/7b/99/9c7b9976e5e4c7d1cc6d8e51186467e1.jpg]Cone Nebula[/url], at the top of the [url=https://cdn.spacetelescope.org/archives/images/screen/heic1307a.jpg]Horsehead Nebula[/url] or at the top of one of the [url=https://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Stellar_%289460796504%29.jpg/1024px-Stellar_%289460796504%29.jpg]Pillars of Creation[/url].
High-mass "first generation" stars form differently, I think. I like the picture of the cosmic Snake at right.
[quote][url=https://www.nasa.gov/feature/goddard/2020/piercing-the-dark-birthplaces-of-massive-stars-with-webb]NASA[/url] wrote:
The Snake: With a name inspired by its serpentine shape, this extremely filamentary cloud is about 12,000 light-years away with a total mass of 100,000 Suns. Scattered along the Snake are warm, dense dust clouds, each containing about 1,000 times the mass of the Sun in gas and dust. These clouds are being heated by young, massive stars forming inside of them. [b][size=120][color=#008000]The Snake may be a section of a much longer filament that is a “Bone of the Milky Way,” tracing out the galaxy’s spiral structure.[/color][/size][/b][/quote]
[float=left][attachment=0]Little nebula man with arrow.png[/attachment][/float]
Speaking of triggered star formation: I love this little "nebula-man" in the Pillars of Creation. This little guy looks like he is balancing a lit candle on his cheek or nose, near his eye. "The flame of the candle", of course, must be a new-born low-mass star, and the "candle" itself must be a small starforming dusty pillar.
Ann