AJBarth

AJBarth, 2 months ago to random

Total #eclipse seen from Horseshoe Bay, Texas!

AJBarth, 2 months ago to random

Tree swallow, Irvine, California.
#BirdPhotography

AJBarth, 3 months ago to Astronomy

Hey Microsoft Copilot, can you draw a cutaway diagram showing the interior structure of the Sun?

#astronomy #hallucinations

AI-generated image of the interior structure of the Sun, with bizarre hallucinated structures.
AI-generated image of the interior structure of the Sun, with bizarre hallucinated structures.
AI-generated image of the interior structure of the Sun, with bizarre hallucinated structures.

AJBarth, 5 months ago to astrophotography

My best #astrophotography picture of 2023: Comet Nishimura rising over Half Dome, September 7. Now reprocessed with better color and contrast than the version I posted in September.

AJBarth, 8 months ago to Astronomy

It's a big day for #Hubble snapshot program 15444! Here are 2 more images that just came in for our active galaxy imaging program. First is SWIFT J2015.2+2526 at redshift 0.046. Second is SWIFT J2259.7+2458 (Kaz 320) at redshift 0.035. These are the first HST images of both objects, and they are too small to be resolved well in ground-based observations, so nothing was really known about the structure or morphology of these galaxies until these images were taken today.
#astronomy

Hubble image of active galaxy SWIFT J2259.7+2458, a spiral galaxy with a bright nucleus.

AJBarth, 8 months ago to random

If you're in the path of the October 14 annular/partial eclipse and you don't have eclipse glasses yet, now is a good time to order them. Make sure that they meet ISO 12312-2 requirements for eye safety.

You can photograph the Sun during the eclipse using an ND-100000 (16.5-stop) filter or a polymer Solar filter.

NASA has important safety information here for eclipse viewing:
https://solarsystem.nasa.gov/eclipses/2023/oct-14-annular/safety/

#Sun #eclipse

AJBarth, 9 months ago to astrophotography

Another view of Comet C/2023 P1 (Nishimura) as seen from Glacier Point, September 6, 4:47 am.

#comet #astrophotography #Yosemite

AJBarth, 9 months ago to astrophotography

Comet C/2023 P1 (Nishimura) rising over Half Dome, Yosemite National Park, Thursday September 7, 5:10 am, as seen from Glacier Point.

This is a composite of 15 2-second exposures, with a Nikon Z 85mm f/1.8 lens.

#comet #astrophotography #Yosemite

AJBarth, 9 months ago to Astronomy

Here are two new #Hubble snapshot images of active galaxies taken on Tuesday for program 15444: SWIFT J1210.1-4637 and SWIFT J2258.9+4054. These are the first HST observations of these galaxies.
#astronomy

Hubble image of active galaxy SWIFT J2258.9+4054, a a highly inclined disk galaxy with spiral dust lanes.

AJBarth, 9 months ago to astrophotography

Yesterday at Grant Grove in Kings Canyon National Park, it was raining in the afternoon and into the evening, with thick clouds until about 1 am. Finally the clouds started clearing and by 2 am it was mostly clear and the #Perseids put on a great show. Here are two of my best shots: 20 sec exposures looking east from Panoramic Point, with Jupiter and the Pleiades in the frame. The 2nd shot has 3 #Perseid trails in a single exposure (not a composite).
#astrophotography

3 Perseid meteors seen in a starry sky, with Jupiter and the Pleiades star cluster in the image. Trees in foreground at the bottom, and distant peaks of the Sierra Nevada in the distance. Taken from Panoramic Point, Kings Canyon National Park, August 13, 2023, at 2:10 am.

AJBarth, 10 months ago to astrophotography

Night sky over Crater Lake, Oregon. A composite of 100 5-sec exposures, combined with Starry Landscape Stacker.
#astrophotography

AJBarth, 11 months ago to random

News release from #JWST today: A filament of 10 galaxies seen just 830 million years after the birth of the universe.

https://webbtelescope.org/contents/news-releases/2023/news-2023-124.html

AJBarth, 11 months ago to Astronomy

A new #Hubble image taken today for program 15444. This is active galaxy Swift J2007.0-3433 (redshift 0.0335), seen by HST for the first time. It's a nice example of an overlapping galaxy pair where the dust lane in the spiral arm of J2007 covers part of the disk of its companion galaxy.
#astronomy

AJBarth, 1 year ago to space

Here's the NASA release of the color image for interacting galaxy pair AM 1214-255, made by combining an image from my snapshot program and another image from @dalcantonJD.

https://www.nasa.gov/image-feature/goddard/2023/hubble-captures-extraordinarily-bright-interacting-galaxies

#astronomy #Hubble