Starship Asterisk*

BDanielMayfield wrote:WHAT is centered at 1218, 246 ???

Visible slightly above left center is the star LL Orionis (LL Ori), originally release by the Hubble Heritage Project in 2002. The delicate bow shock that surrounds LL Ori points towards the stream of gas flowing slowly away from the center of the Orion Nebula, near the Trapezium stars located off the image to the upper left. Close examination of the ends of the bow shock show secondary shocks that are formed as a two-sided jet of gas flowing away from this forming star at high velocity strikes the stream of low velocity gas from the center. To the right of LL Ori, a ghostly veil of material hangs thick and dark, obscuring portions of the nebula behind it.

The bright star toward the lower left of the image, known as LP Orionis (LP Ori), is surrounded by a prominent reflection nebula. Astronomers believe the star is moving within another veil of material that lies in front of M42. The appearance of the bright rim above LP Ori indicates that the teardrop shaped dark region around the illuminating star must be a cavity formed as the star moves through the veil material, rather than being a dusty veil obscuring light behind it.

Object Names: Orion Nebula, M42, NGC 1976

owlice wrote:
The text states that the "small, arcing, graceful structure just above and left of center is LL Ori's cosmic bow shock."

The (excellent) paper available at the link for "the complex" in the last sentence of the explanation has more information and images.

Boomer12k wrote:Lovely picture of one of my favorite areas.

Around the bright star in the lower left, is that not another bow shock, or it is just relfection?

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MargaritaMc wrote:

BDanielMayfield wrote:WHAT is centered at 1218, 246 ???

May I ask what the numbers refer to in the above post?

BDanielMayfield wrote:
There you will find a very dark object that at some magnifications looks rather unnatural. (To be clear, I don’t actually believe it to be some sort of artifact, but … )

Click to play embedded YouTube video.

It's shaped like a huge cigar

BDanielMayfield wrote:
The numbers are pixel coordinates, with 1,1 being on the top left corner of the image. If you view this image in a photo editor you should see at the bottom counters as you move your mouse across the image. The first number is the pixel count to the right from the left side while the second is the count down from the top. As the entire image is about 4800 x 3360 pixels large the object I was pointing out is about 1/4th of the way from the left side and about 1/14th of the way down from the top.

There you will find a very dark object that at some magnifications looks rather unnatural. (To be clear, I don’t actually believe it to be some sort of artifact, but … )

BDanielMayfield wrote:

MargaritaMc wrote:

BDanielMayfield wrote:WHAT is centered at 1218, 246 ???

May I ask what the numbers refer to in the above post?

You certainly may ask. I had to ask a similar question myself about 6 months ago Margarita. The numbers are pixel coordinates, with 1,1 being on the top left corner of the image. If you view this image in a photo editor you should see at the bottom counters as you move your mouse across the image. The first number is the pixel count to the right from the left side while the second is the count down from the top. As the entire image is about 4800 x 3360 pixels large the object I was pointing out is about 1/4th of the way from the left side and about 1/14th of the way down from the top.

There you will find a very dark object that at some magnifications looks rather unnatural. (To be clear, I don’t actually believe it to be some sort of artifact, but … )

BDanielMayfield wrote:WHAT is centered at 1218, 246 ???

BDanielMayfield wrote:There you will find a very dark object that at some magnifications looks rather unnatural.)

Ann wrote:I believe that that is a cavity that has been "blown" in the nebulosity by the wind and radiation from the hot B-type star, LP Orionis.

• It's not anywhere close to LP Ori. I believe this is the object to which Daniel refers ...

bystander wrote:

BDanielMayfield wrote:WHAT is centered at 1218, 246 ???

BDanielMayfield wrote:There you will find a very dark object that at some magnifications looks rather unnatural.)

Ann wrote:I believe that that is a cavity that has been "blown" in the nebulosity by the wind and radiation from the hot B-type star, LP Orionis.

It's not anywhere close to LP Ori. I believe this is the object to which Daniel refers ...

LLOri_hubble_cut.jpg

BDanielMayfield wrote:The numbers are pixel coordinates, with 1,1 being on the top left corner of the image.

There you will find a very dark object that at some magnifications looks rather unnatural. (To be clear, I don’t actually believe it to be some sort of artifact, but … )

Chris Peterson wrote:

BDanielMayfield wrote:
The numbers are pixel coordinates, with 1,1 being on the top left corner of the image.

This convention is a technical curiosity, a consequence of the fact that the first television displays constructed their images by sweeping a raster from the upper left corner of the screen. Since the first digital display devices used television technology for their displays, the memory buffers that mapped to the image treated the upper left as the origin. Otherwise, we'd probably use the more reasonable first quadrant, with the bottom left being the origin.

http://en.wikipedia.org/wiki/Mechanical_television wrote:

[b][color=#0000FF][size=150]Block diagram of General Electric mechanical scan television system, Radio News (April 1928)[/size][/color][/b]

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<<Mechanical television (also called televisor) was a broadcast television system that used mechanical or electromechanical devices to capture and display video images. However, the images themselves were usually transmitted electronically and via radio waves. The reason for the dual nature of mechanical television lay in the history of technology.

The earliest mechanical television components originated with 19th-century inventors, with 20th-century inventors later adding electronic components as they were created. Mechanical systems were used in television broadcasting from 1925 to 1939, overlapping the all-electronic television era by three years. The essential mechanical component usually consisted of a Nipkow disk, which has a series of holes in a spiral pattern. In the camera, the disk had a light-detecting device, usually a photoelectric cell, behind it. In the reproducer (the display), a modulated light source, usually used a neon tube, replacing the light detector. As each hole flew by, it produced a scan line. An AM radio wave or closed circuit then carried the scan line to the TV reproducer.>>

Pkhabu wrote:I am not an astronomer, so my first thought on seeing the object referred to by Chris Peterson was, a man-made satellite.
It does appear to be partially blocking a bright area, giving the object a pinched waist.
I suppose it would be visible in other space photos of the region if the object is stellar rather than man made.

BDanielMayfield wrote:If this object is as we suspect a solar system in the making about how long in au might it be?

Ron-Astro Pharmacist wrote:
Sure looks like previous pictures (sorry I can't give specifics) that are described as a possible new solar system in the process of formation. A few days ago when Anthony had described protuberances as new star formation (in the APOD "Trifid Nebula") and the new star was leaving trailing a dust cloud. Is this just a newer version? In that it just hasn't had time to leave a protuberance/dust cloud.