Starship Asterisk*

In today's APOD (10/26/21), is a movie of Jupiter rotating. Just off of center at the start of the video is a straight black line going from pole to pole. One of my 9yr old students noticed it. I at first thought it was produced by the lens, but then I noticed that the line rotated with the planet....

Scariest nebula photo, ever!!!
Almost as scary as batcat…


Happy Halloween!

Eric

I have never had the opportunity to see a big rocket launch.

Eric

SpaceCadet wrote: ↑Tue Oct 19, 2021 4:55 am Are these clusters visible to us with a telescope from earth?

It’s 11th magnitude so a very small telescope, even a 2 inch lens, could in theory pick it up.

Eric

krajesh304 wrote: ↑Mon Oct 11, 2021 4:28 am Isn't Ganymede more than 5000 km wide ? I suppose 'wide' would refer to the diameter of the object rather than its radius.

You are correct! Ganymede is actually larger than Mercury!
I have no idea where they got 2,000 km…




Eric

Under the link to “counter intuitively”… “ We suggest and motivate a precise equivalence between uncompactified 11-dimensional M theory and the N=∞ limit of the supersymmetric matrix quantum mechanics describing D0 branes. The evidence for the conjecture consists of several correspondences between t...

donalgary wrote: ↑Wed Sep 15, 2021 8:57 pm I'd really like to see a four maps, each one for a five year period to see if there is a systematic change in the paths. Any suggestions?

NOAA has a yearly database with maps of the year’s hurricanes…

https://www.aoml.noaa.gov/hrd/hurdat/Da ... Storm.html

Eric

Fascinating. And South America doesn't get them - except for a solitary example ?? Are there any theories about why that may be ? I came to ask the same question... It’s interesting, I thought the reason why was the Southern Atlantic was too cold for the to form but according to NASA… “ Vertical wi...

I’m curious if that slight bulge and dot at the 12:30 position on the star is another planet or if it’s just a processing artifact.
Also it’s really impressive how sharp the ALMA image is compared to the visual light one.

Eric

In the '70's, I loved watching transits of the Jovian moons' shadows, and transits of the moons themselves on Jupiter's disk but for some reason I was never able to see a moon eclipse another, much less on Jupiter's disk, as seen from Earth. But I was able to see one moon occult another on more tha...

Ann, thanks for the great explanation, I learn something new every day! Orin, you’ve outdone yourself with today’s kitty picture, I’m a sucker for orange cats. They are talkers with great personalities. I believe he’s considering catastrophic explosions or how purrfect it would be if they brought ba...

“It's a great value, particularly as it does not follow the subscription model of software that is so popular these days. You buy it, you have a lifetime license, across multiple machines, and all future updates. I mostly ignore software these days that requires regular payments to maintain.” I coul...

That is one giant golfball!
This image is a repeat yes?

Eric

Hi Ann!
The Cygnus x-1 link (Chandra Nasa) says the best measurement they have puts it at 6070 light years distant.
https://chandra.harvard.edu/photo/2011/cygx1/

Eric

Several members above have posted images. I see from the FAQ page that image posting is allowed if so enabled for that thread (which clearly has been done) and if that member has the priviledge. May I post images, please? JOhn With the vast amount you have posted I can’t believe you don’t have that...

Both of these craters seem to have grooves near the northern rim. Alphonsus has several other lesser grooves too. How do we explain the grooves? Those are lunar rilles. The cause of their formation is in dispute. They could be collapsed lava tubes. They could also be tectonic in nature where the cr...

M27_Falls_3557.jpg Just beautiful; Don't want to experience it here on Earth while I am still here! :mrgreen: 70cec30919aefe50ada3bd8e0e6239e6.jpg These guys are about to figure it out!🐶 :? Orin, Love the pugs. I grew up with one “Tiny”. She was great, lived to 15 1/2 on chicken gizzards and chocol...

I once read that with the light of the Earth you could read the newspaper on the Moon The "full" Earth can be ~15x brighter than a full moon. People have claimed to read as small as ~ 12 pts font size during full moon. Assuming a 10pt font size for newspapers, I think what you read is pla...

This picture has a wonderful Parrish Blue in it… https://4.bp.blogspot.com/_gOMgR_Ovxko/SjgObRSAbcI/AAAAAAAAAtM/qdwZLX0HTc8/s400/Parrish_Maxfield_New_Moon_1958.jpg “Maxfield Parrish's art is characterized by vibrant colors; the color Parrish blue was named after him. He achieved such luminous color...

Ann wrote: ↑Sun Jul 11, 2021 4:43 am Beautiful image. The Moon is as nebulous and ethereal as a dream.

And yet it is so substantial!

Ann

A really apt description Ann!

Eric

This picture has a wonderful Parrish Blue in it… https://4.bp.blogspot.com/_gOMgR_Ovxko/SjgObRSAbcI/AAAAAAAAAtM/qdwZLX0HTc8/s400/Parrish_Maxfield_New_Moon_1958.jpg “Maxfield Parrish's art is characterized by vibrant colors; the color Parrish blue was named after him. He achieved such luminous color ...

There's an awful lot to digest here! Stars blow up and make little strars; and little stars have lesser stars and on to------ :shock! Anyway all the videos were very interesting; but 3 repeats? The one about star sizes was most interesting! 21042210_264995290674140_8840525631411191808_n.jpg Awe; po...

M99_LeoShatz_cropped1024[1].jpg M99. Image: Hubble/Leo Schatz. https://upload.wikimedia.org/wikipedia/commons/9/97/M99s.jpg Obviously the Hubble/Leo Schatz image does a much better job than the Adam Block image of giving us great resolution, but Adam Block gives us a clearer idea of the interesting...

Flying canoes anyone? https://www.giltweasel.com/pics/flying-canoe.PNG :lol2: If you look closely; you can see the ripple behind the boat! Very clear water that the shadow on the bottom of the lake can be seen, even the oar's shadow! Nicely done! Look close and you can also see the ghostly reflecti...

Does anyone have access to a rather detailed pressure-temperature relationship on say a Sun like star (actually most any type I'm not picky!) ?
I have found a few coarse ones in textbooks but they don’t have near enough grain.
Before you suggest STARFORGE is WAY above my head!
Thanks!

Eric