Starship Asterisk*

cool!

ColombariNGC3199_1024.jpg I wish they would have pointed out the location of the star that created this beautiful NGC3199 Nebula! :wink: Also please does anyone knows if there is some lighting from above the picture? That brighter edge along the top covers in fact a large part of the surface far fr...

ok I am happy.
In fact I was trying to ask if the steve could have been an arc of a ring centered on the magnetic pole. But the curvature should be hard to judge.
At 450 km distance an arc of a ring at 47°28′08″N which has cosine = 0.68 and radius = 4300 km is pretty straight

Ann wrote: ↑Wed May 05, 2021 6:18 am

STEVE and starry background MaryBeth Kiczenski.png

4) Pollux
5) Castor
Ann

Any chance that the North pole or a magnetic pole is the center of this STEVE arc?

Here's another interesting article on STEVEs research: http://www.sci-news.com/othersciences/geophysics/steve-mechanisms-07137.html This pic is rather confusing. http://cdn.sci-news.com/images/enlarge6/image_7137_2e-STEVE.jpg The SAID ring (with a STEVE segment) around the polar magnetic field is s...

orin stepanek wrote: ↑Sun May 02, 2021 12:06 pm 280px-Eta_Carinae.jpg
Is Eta Carinae a double star?

Will some one please help me see this Eta Carinae butterfly thing in the posted pic?

I feel I miss something.
The background nebula behind Polaris is Integrated Flux Nebula, but may lie within the thick Milky Way disk and have plenty of stars to frontlight parts of it locally.
OK.
But why label such nebula an Integrated Flux at all?

I can't resist showing you one of the pictures where Polaris, or at least its halo, looks blue. It is an image by Rogelio Bernal Andreo, and in this picture, Polaris was visited by Comet C/2014 Q2 Lovejoy with its green coma, blue tail and short rather green-looking antitail. Nice!! :D Ann https://...

Ann wrote: ↑Mon Apr 26, 2021 10:16 am So, you math people out there, I challenge you! Will you figure out the distances to these stars for me?

I applied the figures for facebook 3d AI, but it turned out no good
https://www.facebook.com/victor.borun/p ... 8519499897

what my eyes see in the pic: cyan (only in some places, must be an accessory bottom or belly part of an ionosphere wave) to green to yellow to orange to red to magenta what I read: 95 km high, faint blue range glow emitted by O₂ molecules; 90 to 100 km high, 558 nm, green emitted by neutral O atoms....

Guest wrote: ↑Wed Apr 14, 2021 5:57 pm If this is a side-on view, does that mean all these other supernova remnants we see as circular aren’t actually spheres but more flattened circles?

a thin ghostly-transparent sphere shell is mostly visible edge-on where it's thicker

We appear to be looking down on the accretion disk and yet the jets seem to be heading in the wrong direction for that to be true. Here's my attempt to 3d-convert the radiowave pic of the clouds at the M87 jet-ends Here's my attempt to 3d-convert the IR pic of the clouds at the M87 jet-ends I used ...

so Alnitak has a large parallax and therefore is close to us and the Flame Nebula has a zero or small parallax and can never be backlighted from Alnitak. Now the Flame Nebula can not be backlighted from the stars within at a small angle; we get to see all angles from 0 to 90°. And how can it be yell...

So I don't think that dust can make an intrinsically red (or pink, or magenta) emission nebula yellow. However, an embedded region of star formation may well produce quite a lot of blue light, which may then be reddened to a fairly deep yellow hue because of lots of intervening dust. I guess Alnita...

That's a striking rendition of the Flame Nebula, looks more like a painting. Unfortunately it's been flipped left-right. I had to rotate by 174,5°after the flip: https://scontent.fhel4-1.fna.fbcdn.net/v/t1.6435-9/172216489_3829845087136574_4155472068737884903_n.jpg?_nc_cat=100&ccb=1-3&_nc_s...

That's a striking rendition of the Flame Nebula, looks more like a painting. Unfortunately it's been flipped left-right. Yes Ann, I've often wondered about the yellow colour of the Flame Nebula. I'm guessing dust has something to do with it? Can the Flame Nebula reside in front of Alnitak? Backligh...

eegriff wrote: ↑Mon Apr 05, 2021 6:58 pm Veil Nebula fragment located. Watch the video. https://www.youtube.com/watch?v=hlx-6FVyT8o

yes!

In images of the complete Veil Nebula, even studious readers might not be able to identify the featured filaments. Okay, that sounds like a veiled challenge to locate today's APOD in the APOD from 2019-10-31 (https://apod.nasa.gov/apod/ap191031.html). Capture.png And it does seem rather challenging...

APOD Robot wrote: ↑Sat Apr 03, 2021 4:06 am The Mars Ingenuity Helicopter, all four landing legs down.

At the first look it seems scary, the way the car is sitting down so the copter's legs almost scratch the ground.
At the second look you notice the shadow cast by the right background leg and know that there is in fact a gap.

Our geocentric units long since got insufficiently precise. So what? We never abandon them, just re-define in a more precise way. Meter used to be 1 / 40 million of the Parisian meridian. Gram used to be the mass of 1 cubic centermeter of water at the temperature near 0°C where the density peaks. Se...

In a dense atmosphere like Jupiter's the mean free path is not going to be much more than one or two molecules and so the electric field needed to instigate lightning is just absolutely massive which is why there is little lightning elsewhere on Jupiter - the charges are dissipated by the general a...

are elongated minor moons binary mergers at their core?

JohnD wrote: ↑Sun Mar 28, 2021 7:53 pm

VictorBorun wrote: ↑Sun Mar 28, 2021 11:47 am What do they call a dwarf of known origin? Something ibn NGC 4038 ?

A gnome?

gnome can't be used in a phrase like a gnome of X

I think "A gnome of a galaxy" would mean something other than a seperated patch of a galaxy

giant elliptical galaxy M60 has a tiny compact companion galaxy that is called M60-UCD1. UCD1 means Ultra Compact Dwarf 1, and M60 means that this dwarf is a satellite of M60. So I guess it would be possible for a dwarf of NGC 4038 to be named after NGC 4038, but I'm not aware of any dwarf galaxies...

In the image at left, note the tail emanating from NGC 4038. The tail extends to the left and down. Note that at the end of it, star clusters have formed, which may later turn into dwarf galaxies. In the image at right, I would guess that the dark blue stuff seen in the tail is (neutral) hydrogen g...