Starship Asterisk*

Let's start with my Chandra portrait of NGC 604: APOD 25 April 2024 annotated.png Possible location of the Chandra bubbles in the APOD. Maybe it's just the right-hand bubble that is seen in the Chandra image. https://chandra.harvard.edu/photo/2009/n604/n604_labeled_525.jpg Chandra X-ray Observatory...

fit to my eye a blue (OIII, right?) jellyfish swimming rightward from the star breakes the bipolarity

Contrail Shadow X (2024 Apr 23)-.jpg I'm not sure what the lines in your image are intended to demonstrate. To me, they don't make it any clearer that the contrail shadows are being cast down onto the clouds, not upwards. only that the sun is well above the horizon in this APOD; but that's enough t...

I agree with others here that we are seeing the shadows of the contrails cast down onto the clouds, not up. (I'm not convinced it's even possible to have a contrail shadow cast up onto a cloud... the Sun would have to be on or slightly below the horizon, and I think the directly illuminated cloud w...

I agree with others here that we are seeing the shadows of the contrails cast down onto the clouds, not up. (I'm not convinced it's even possible to have a contrail shadow cast up onto a cloud... the Sun would have to be on or slightly below the horizon, and I think the directly illuminated cloud w...

This is a classical optical illusion: the cloud cover is lower than the contrails and thus the shadows are below. The low standing sun deceive the observer, because the observer places the plane in between the low standing sun and the shadows overhead (according to the relative altitudes above the ...

Suppose a 100 suns mass in Eta Carinae is where the most of interstellar matter went from a large volume like 30 light years sphere. Did all that matter form an oblique black globe of 3 light years on its way to collapsing into the star? That would imply that compressing the volume by 1000 times and...

https://www3.mpifr-bonn.mpg.de/staff/abrunthaler/m82/Radio_m82sn_engl_nocoin_med.jpg https://www3.mpifr-bonn.mpg.de/staff/abrunthaler/m82/pr-m82sn-en.html Suppose there are currently two supermassive black holes 20 light days apart in 2d view and 200 light days apart in 3d with no accretion to spea...

AVAO wrote: ↑Fri Apr 19, 2024 5:59 am
https://live.staticflickr.com/65535/536 ... 5736_o.jpg
https://live.staticflickr.com/65535/536 ... 7891_o.jpg

here is a pair of cones my eyes make of that pic
...

[...] Interesting… not even the enlarged Hubble image is sharp or detailed enough for me to notice any individual clusters, especially around the part that Webb zoomed in on. But maybe that’s just me. Are you sure you aren’t comparing Hubble’s entire image to the close up from Webb? Yes. That is re...

https://www.wired.com/images_blogs/wiredscience/2011/01/WISE-M81-M82.jpg Clearly M82 is an unusual case, because if it wasn't, we'd see many more galaxies like it. Ann Looks like the Milky Way, Andromeda and the Triangulum but M82 the Cigar is passing through a baby boom phase right now and NGC 307...

https://www.wired.com/images_blogs/wiredscience/2011/01/WISE-M81-M82.jpg Clearly M82 is an unusual case, because if it wasn't, we'd see many more galaxies like it. Ann Looks like the Milky Way, Andromeda and the Triangulum but M82 the Cigar is passing through a baby boom phase right now and NGC 307...

[...] Interesting… not even the enlarged Hubble image is sharp or detailed enough for me to notice any individual clusters, especially around the part that Webb zoomed in on. But maybe that’s just me. Are you sure you aren’t comparing Hubble’s entire image to the close up from Webb? Yes. That is re...

I suppose the Sun has no meaningfully permanent longitude map that would allow these two coronal un-wrappings to be matched up. Which makes sense since the Sun is just a ball of plasma! But I gather that the rotational north-south pole line should remain the same long term. Or does it? I know the r...

I suppose the Sun has no meaningfully permanent longitude map that would allow these two coronal un-wrappings to be matched up. Which makes sense since the Sun is just a ball of plasma! But I gather that the rotational north-south pole line should remain the same long term. Or does it? I know the r...

I found a diagram that applies to the high temperature, high pressure scenario of a supernova: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQnOo5HRQcWqFvAXdS870Vf-ti_vF8V-dRXI2NtzzZ-fw&s Source: https://isnap.nd.edu/assets/250195/radioactivity_lecture_10.pdf I think I get it… still, wh...

With a temperature near 200,000 K, WD J005311 is the hottest star known. The extreme properties of the central star are being powered by the residual radioactive decay of ⁵⁶Ni, where the usual half-life of 6.0 days from electron capture is increased to many centuries due to the nickel being complet...

More important still might be the way that the bar, specifically the dust lanes in the bar, feed gas into the central black hole of a barred galaxy. By what mechanism? Is the dust and gas in the bar so dense it behaves like a viscous liquid, resulting in particles losing energy and spiraling inward...

This is how the center of NGC 1365 works: https://asterisk.apod.com/download/file.php?id=49106&mode=view Optical image of NGC 1365 from the Dark Energy Survey (left). Credit: Schinnerer et al. 2023 Ann so a bar in a barred galaxy is a pair of wide and slightly curved jets flowing to the ring-sh...

Under clear skies, the sky is almost the same blue anywhere, opposite the Sun or right next to the Sun. The color of the Sun itself (and therefore the direct light it casts) is filtered towards yellow/orange/red by the scattering away of blue. the sky of Sunset at Cerro Armazones, 360° Panorama htt...

This is how the center of NGC 1365 works: https://asterisk.apod.com/download/file.php?id=49106&mode=view Optical image of NGC 1365 from the Dark Energy Survey (left). Credit: Schinnerer et al. 2023 Ann so a bar in a barred galaxy is a pair of wide and slightly curved jets flowing to the ring-sh...

I wonder if this deep sky APOD contains any coincidences with the constellation art of old.

Interstellar dust is "brown" (low saturation red/orange) because of the nature of the silicates and carbonates that make it up. I think the scatter is primarily Rayleigh scattering off of very tiny particles and gas molecules, in which case the forward and back scatter are symmetric, and ...

Interstellar dust is "brown" (low saturation red/orange) because of the nature of the silicates and carbonates that make it up. I think the scatter is primarily Rayleigh scattering off of very tiny particles and gas molecules, in which case the forward and back scatter are symmetric, and ...

https://images.fineartamerica.com/images-medium-large-5/a-wide-field-view-over-the-pleiades-roberto-colombari.jpg https://apod.nasa.gov/apod/image/0911/california7_andreo.jpg Ann I made an attemt to subtract the general galactic illumination on the dust Wide field Pleiades with light brown dust bun...