Starship Asterisk*

https://apod.nasa.gov/apod/image/1801/Witchhead_Cogo_1024.jpg https://apod.nasa.gov/apod/image/2010/GhoulGood.jpg Comparing the Witch Head Nebula pic with this one, I have no idea how this smaller field fits into the larger Witch Head pic. Also which star is Rigel? I'm not seeing any way to rotate ...

https://apod.nasa.gov/apod/calendar/S_180115.jpg Rigel and the Witch Head Nebula Explanation: By starlight this eerie visage shines in the dark, a crooked profile evoking its popular name, the Witch Head Nebula . In fact, this entrancing telescopic portrait gives the impression that the witch has f...

So does the cloud in the top half of this image have a name? It's not shown in the linked pics of the Ghost Nebula proper.

I wonder what on Earth is making the cone of light in the bottom right corner https://scontent.fhen2-1.fna.fbcdn.net/v/t1.0-9/122607445_3377825805671840_4118261237163859252_n.jpg?_nc_cat=101&ccb=2&_nc_sid=dbeb18&_nc_eui2=AeEU_2KXGFN6RwzuPRxUFNFqdkXPENU54-J2Rc8Q1Tnj4g7YPMOxTkzFFw8AhHzmFT...

Nonetheless, I found the based on the spiral arm pitch angle to provide a perfect explanation! So, apparently a variation in how you measure the "spiral arm pitch angle" (whatever that is) results in a large range of black hole mass estimates? I assume then that the "spiral pitch ang...

A mass between 1.1 and 44 million years ? I presume it's a typo in the wikipedia article, but that would be quite a large range of solar masses assuming that's what those numbers really mean. Nonetheless, I found the based on the spiral arm pitch angle to provide a perfect explanation! So, apparent...

Great photo, thanks. Could you please explain why the diffraction pattern of the supernova is so different from diffraction patterns of all other bright stars on this photo. Thank you. The data for the SN appears to have been collected in a single imaging session, while the data for the galaxy as a...

<<NGC 2525 is a barred spiral galaxy located in the constellation Puppis. It is located at a distance of about 70 million light years from Earth, which, given its apparent dimensions, means that NGC 2525 is about 60,000 light years across. It was discovered by William Herschel on February 23, 1791....

Thanks for the calculations and discussion, Chris and Johnny! So, Gargoyle Saxum would be not too hard to budge, because the gravity on Bennu is incredibly weak. But it would take lots of fuel to do much with anything that large, or to do much to Bennu itself, with a technique of pushing by a rocke...

Gargoyle Saxum is pretty darn big! This says the small lighter rock sitting on Gargoyle Saxum is 6.2 ft long: https://www.asteroidmission.org/20190405-tilted-gargoyle/ Take it as approximately 10 m x 10 m x 20 m, for a volume of 2000 m 3 . Assume a density of 3000 kg/m 3 , so a mass of 6 million kg...

As I read about the TAG maneuver, the gas bottles, and the method of sample collection, it is all very creative. I suppose that up until OSIRIS-REx arrived at Bennu, there were a lot of unknowns, and this technology probably provided a high probability of at least gathering some sample under a lot ...

Oh, not where I looked for it at all :lol2: Yeah, I was also clueless. After Ann pointed it out, I think i found Polaris and The Little Dipper with a little help from https://images.squarespace-cdn.com/content/569d1bf84bf118627e7d0e1b/1453393456571-EUWE77BC6JB92LNPVTV9/?format=1000w&content-typ...

sillyworm 2 wrote: ↑Mon Oct 19, 2020 7:38 pm I didn't mean actual motion...I was just noticing how some of the gases,esp around the equatorial belts,were layered.

Ok. Do you think the video does a better job of that than a few still images?

Stunning....you can get a nice feeling of how the gases mingle. How so? This video was artificially created from 41 still images, so no true motion of gases is being seen. From the "featured video" link in the description: Citizen scientist Kevin M. Gill created the video using data from ...

Again..is the smaller galaxy in the arm of the larger galaxy mergings as well or is it behind the galaxy? Sorry, sillyworm 2, I was hoping someone else might provide a better answer than I can. Googling hasn’t turned up much, but this pic from https://hubblesite.org/contents/media/images/2011/11/28...

Snarf wrote: ↑Sun Oct 18, 2020 3:47 pm I only see one (1) galaxy. I wish you people would annotate this stuff!

Indeed. The companion galaxy is not even in the picture! See my prior post.

https://apod.nasa.gov/apod/calendar/S_201018.jpg UGC 1810: Wildly Interacting Galaxy from Hubble Explanation: What's happening to this spiral galaxy? Although details remain uncertain, it surely has to do with an ongoing battle with its smaller galactic neighbor . The featured galaxy is labelled UG...

JohnD wrote: ↑Sat Oct 17, 2020 10:21 am There's a black dot in the centre of the Crescent Nebula. Small dust cloud outside it, or what?
JOhn

Zooming in, it just looks like a small local unusually dark area. Optically intriguing, but probably nothing that special. But what do I know?

I wonder - 1) All objects without spikes are galaxies then ? 2) What's the blue spike/colored star towards top right corner ? The bright blue star is HD 205514. It is a star of spectral class A0, not unlike Vega. The star is located some ~ 1.000 light-years away, and at that distance, it is a faint...

Capture1.PNG Deer Lick Group and companion with arrow.png A faint fuzzy companion galaxy of NGC 7331? According to Wikipedia, NGC 7320 is only 39 million light-years away, making it a possible (but perhaps not probable) physical member of an extended NGC 7331 group of galaxies. NGC 7331 itself is b...

Were the broken links on your google drive perchance? If so, I think they have to be explicitly "shared to all" or some such thing. I'd like to know if those links were broken for others besides me. I can follow the link: https://lh3.googleusercontent.com/proxy/KvOQBNIUiM8cKB8nvgz6Iq9Tx_s...

You can actually tell at a glance that it is a small galaxy. And yes, its bulge is faint because it contains few stars. https://lh3.googleusercontent.com/proxy/KvOQBNIUiM8cKB8nvgz6Iq9Tx_synjhoc_IvGm4cn4Z8OsqR3OgrtZ82e8PSNPiPcSiP8ptw2sNl2xvZWGfX1X0eCtn9PdhNK3H__nJfgDEim_T28Vu4X8ObRa5mBJCR5WBi1vM Goo...

NGC 7320 is a gorgeous galaxy.Is the bulge faint because of a low star count? Does the galaxy as a whole have a lower star count compared to others it's size? You can actually tell at a glance that it is a small galaxy. And yes, its bulge is faint because it contains few stars. https://lh3.googleus...

Thanks Ann for your detailed explanations and image annotating! The APOD description left me fairly confused. In one reply you said: "Basically, when an ultraviolet photon hits a hydrogen atom where the electron is in its lowest shell, the electron will (usually) be kicked "one level up&qu...

Chris Peterson wrote: ↑Tue Oct 13, 2020 9:02 pm

johnnydeep wrote: ↑Tue Oct 13, 2020 8:52 pm So, why is the famously red Mars not so red in this photo (though the mouse-over tag word desperately tries to make up for it)?

Because it is massively overexposed, meaning the red, green, and blue channels are all maxed out, making the image color white.

Ah, thanks.