Starship Asterisk*

https://upload.wikimedia.org/wikipedia/commons/3/31/Stable_puffer_animation.gif https://www.youtube.com/watch?v=R9Plq-D1gEk <<In a cellular automaton a puffer train, or simply puffer, is a finite pattern that moves itself across the "universe", leaving debris behind. Thus a pattern consis...

There is one caveat to that though: One of the few properties a BH can have is charge. So if two BH where both positively or both negatively charged, there would be an electrostatic force of repulsion working against their gravitational attraction. (Conversely, if the charges where opposite the att...

https://apod.nasa.gov/apod/calendar/S_200908.jpg GW190521: Unexpected Black Holes Collide Explanation: How do black holes like this form? The two black holes that spiraled together to produce the gravitational wave event GW190521 were not only the most massive black holes ever seen by LIGO and VIRG...

Just wonder how strong the repelling force would have to be between the two black holes in order to repel a black hole? Black holes, being the chunkiest bodies in the universe, would never be repellent. There is one caveat to that though: One of the few properties a BH can have is charge. So if two...

https://apod.nasa.gov/apod/calendar/S_200907.jpg The Milky Way over St Michael's Mount Explanation: Where do land and sky converge? On every horizon -- but in this case the path on the ground leads to St Michael's Mount (Cornish: Karrek Loos yn Koos), a small historic island in Cornwall , England ....

Neutron stars are one of my favorite things. This in no small part due to the book Dragon's Egg , by Robert Forward . It's about life on a neutron star, and is considered a classic of "hard sci-fi". From https://en.wikipedia.org/wiki/Dragon's_Egg Dragon's Egg is a 1980 hard science fiction...

<<Atbash is a monoalphabetic substitution cipher originally used to encrypt the Hebrew alphabet. It can be modified for use with any known writing system with a standard collating order. The Atbash cipher is a particular type of monoalphabetic cipher formed by taking the alphabet (or abjad, syllaba...

Orin wrote, Does it look like a wizard? Well I don't see it in today's APOD. But on Wikipedia, article about NGC 7380, their first photo. I think with imagination I can see it. The top left the dim red spot looks like a wizards hat. Below is a fat face with a pointed nose. His left arm is sweeping ...

So, how does the AMIGA project know that what its measuring is due to the halo around Andromeda as opposed to the likely halo around the Milky Way through which all the light from the tell-tale quasars must travel before we can measure it?

How many of you can spot the M33 galaxy in this image? Nice test question! I found it with the help of this prior APOD - https://apod.nasa.gov/apod/ap130926.html : M31 and M33 In The Sky Together.JPG So, here it is in this APOD of M31's halo: M31 and Its Halo, and M33 In The Sky Together.JPG From t...

Too much power for me! Too bad man can't harness it yet; but knowing man; some future time he may try! :mrgreen: What would we do with it? Our own puny little sun already provides vastly more power than we can use, readily accessible with technology we already have. Something that spits out all of ...

I find the gamma ray pulse being an 162 day period interesting. Just 3 or 4 days ago I read in the news that the fast radio burst FRB 121102 has returned as predicted, with a period of 161 days. Is it just a coincidence of the 161 day period? Wonder how far apart the location of these two objects a...

https://cdn.mos.cms.futurecdn.net/aGmFwaxyc5j7LGoqwrFR2X-650-80.jpg https://www.youtube.com/watch?v=HTdOQjmbAHY <<A crime in a zoo's koala cage would probably confound the efforts of even the best detectives. Why? Because koalas, doll-sized marsupials that climb trees with babies on their backs, ha...

Jim Westwood wrote: ↑Fri Aug 28, 2020 4:26 am Can anyone figure what is the strange object that comes flying through the field of view at about 1:50 in the three-minute video flight through the nebula?

That jumped out at me as well (literally!). It sure does look curious:

https://lh3.googleusercontent.com/proxy/p-hWckpUTYZvjcKAq-5xvvDgnb1IjRTLfYBcN24VHOdpSPXjzKk3tzK0c6aUdfkEFmSfKN3Pi3uQXuIYvkMo9xcWoPIY0Vr5vz0 How about it's the NGC 474 Galaxy Group version of the Large Magellanic Cloud? Ann Though it looks similarly rectangular, this one seems more well-defined and ...

https://apod.nasa.gov/apod/calendar/S_200827.jpg Shell Galaxies in Pisces Explanation: This intergalactic skyscape features a peculiar system of galaxies cataloged as Arp 227 some 100 million light-years distant. Swimming within the boundaries of the constellation Pisces , Arp 227 consists of the t...

https://apod.nasa.gov/apod/calendar/S_200827.jpg Shell Galaxies in Pisces Explanation: This intergalactic skyscape features a peculiar system of galaxies cataloged as Arp 227 some 100 million light-years distant. Swimming within the boundaries of the constellation Pisces , Arp 227 consists of the t...

https://apod.nasa.gov/apod/calendar/S_200827.jpg Shell Galaxies in Pisces Explanation: This intergalactic skyscape features a peculiar system of galaxies cataloged as Arp 227 some 100 million light-years distant. Swimming within the boundaries of the constellation Pisces , Arp 227 consists of the t...

Relativistic jets may provide evidence for the reality of frame-dragging. Gravitomagnetic forces produced by the Lense–Thirring effect (frame dragging) within the ergosphere of rotating black holes combined with the energy extraction mechanism by Penrose have been used to explain the observed prope...

What doesn't? :lol2: An accretion disc does not depend upon a rotating black hole. Infalling matter is in orbit, and interacts with other matter such that particles exchange angular momentum and are ejected or end up in the same plane. In general, an accretion disc does not need to align in any par...

So, the text says the accretion disk "never appears flat", but it sure looks flat to me, at least when looking down from the top! What doesn't? :lol2: An accretion disc does not depend upon a rotating black hole. Infalling matter is in orbit, and interacts with other matter such that part...

https://apod.nasa.gov/apod/calendar/S_200825.jpg Visualization: A Black Hole Accretion Disk Explanation: What would it look like to circle a black hole? If the black hole was surrounded by a swirling disk of glowing and accreting gas , then the great gravity of the black hole would deflect light em...

The frame with the info is only in the thumbnail and is too small to read. It isn't in the video which I can expand. Hmm. Are you are referring to the first still frame of the video, which includes descriptive text blocks pointing out the various features of the image, before you click the arrow bu...

The blurb refers to the "da Vinci glow", and gives links to da Vinci, and to previous APODs that show the glow, but nothing to da Vinci's original - geniusly original, for the time, even if erronius! - explanation. It's in the Codex Leicester, a collection of his papers on astronomical an...

The blurb refers to the "da Vinci glow", and gives links to da Vinci, and to previous APODs that show the glow, but nothing to da Vinci's original - geniusly original, for the time, even if erronius! - explanation. It's in the Codex Leicester, a collection of his papers on astronomical an...