Spiral Nebula Newly Discovered

Measures according to Hubble:

To kickstart the 30th anniversary year of the NASA/ESA Hubble Space Telescope, Hubble has imaged a majestic spiral galaxy. Galaxy UGC 2885 may be the largest known in the local universe. It is 2.5 times wider than our Milky Way and contains 10 times as many stars.

A number of foreground stars in our Milky Way can be seen in the image, identified by their diffraction spikes. The brightest appears to sit on top of the galaxy’s disc, though UGC 2885 is really 232 million light-years farther away. The giant galaxy is located in the northern constellation Perseus.

https://www.spacetelescope.org/news/heic2002/

OK, 2.5 times wider than "our Milky Way" ... of which we are presumed to be a part. How wide is that? 150–200 kly

= 150 000 light years to 200 000 light years.

Times 2.5.

375 000 to 500 000 light years.

232 million light years farther away ... than what? I'm looking it up.

https://en.wikipedia.org/wiki/UGC_2885

Ah, somewhat more precise.

It is 232 million light-years (71 Mpc) from Earth and measures 463,000 ly (142,000 pc) across, making it one of the largest known spiral galaxies.

232 000 000 ly = 232 000 000 * 365.25 ld = 84 738 000 000 ld.

463 000 ly = 463 000 * 365.25 ld = 169 110 750 ld.

Now, suppose it is only one ld up, 84 738 000 000 times closer. That makes the diameter 84 738 000 000 times smaller.

169 110 750 / 84 738 000 000 = 0.0019956896551724 ld

Each light day is "25 902 068 371 200 metri" (grazie, agl'italiani solla wikipedia!)

0.0019956896551724 * 25 902 068 371 200 =
51692489895.97205652319488
51 692 489 896 m = 172.42758620698856 light seconds

How much is that on the heavenly sphere?

Given that the radius is 1 light day, given also that each full circle is 2π light days, how much of that is 172 light seconds?

A full circle around the heavenly sphere would be 542 867.21 light seconds.

172.42758620698856 / 542867.2105403162716063 = 0.0003176238734982192
"172 / 542867 = 0.0003"

How much is that in degrees?

360*0.0003[176238734982192] = 0.11[4344594459358912]

In minutes, then?

360*60*0.0003[176238734982192] = 6.86[067566756153472]

And in seconds?

360*60*60*0.0003[176238734982192] = 411.64[05400536920832]

411 / 60 = 6.85

411 - 360 = 51

Ah, so the "galaxy" UGC 2885 is 0° 6' 51" of a full circle ... which arguably the scientists will agree with, if nothing else here.

Hans Georg Lundahl
Bibl. M. Audoux
St. Hilary of Poitiers
14.I.2020