Tessera
Folgen

Dan Burns

@the-physics-well.net

Physics Educator, Space Enthusiast, Astrophotographer https://the-physics-well.net/

2754 Posts1448 Follower265 Folgt
Dan Burns@the-physics-well.net · 10h ago

70 mi diameter Moretus (center) dominates this view of the Moon's south pole. Its central peak casts a long shadow like the gnomon of a giant sundial. Some areas near the limb are always in sunlight, making them a promising location for a solar-powered lunar base. Details in ALT. #astrophotography

closeup view of a heavily cratered region of the moon showing large and very tiny craters. Meade 8"SCT with 2x barlow, ZWO ASI178MM camera. The best 10% of 1004 frames stacked with autostakkert and processed with Registax and Photoshop
Dan Burns@the-physics-well.net · yesterday

I continue to take advantage of the clear skies, steady air, and good placement to image Saturn in the early morning. There is a hint of structure in the rings interior to the Cassini division in this image from yesterday morning. Details in ALT. #astrophotography

image of saturn with some cloud bands visible. the cassini division shows as a gap in the rings. saturn casts a shadow on the rings in the lower right. Meade 8" SCT with 2x barlow and ZWO ASI662MC camera. The best 15% of 11983 frames were stacked with Autostakkert and processed with Registax and Photoshop. Video gain 455 with 25 ms exposure
Robert McNees@mcnees.bsky.social · last yr.

William Rowan Hamilton was born #OTD in 1805. His reformulation of classical Newtonian mechanics via the principle of stationary action is one of the most beautiful ideas in all of physics, and is at the heart of nearly every modern theory in physics. 🧪 ⚛️

The title graphic from the musical Hamilton. Instead of a silhouette of Alexander Hamilton forming the tip of the large black star at the center of the image, there is a black and white image of a balding, sideburned William Hamilton.
Robert McNees@mcnees.bsky.social · last yr.

For the longest time, he couldn't. Until one day he had a flash of insight while walking across a bridge with his wife: i² = j² = k² = i j k = -1 He stopped and carved his formula for quaternions right there on the bridge. There's a plaque there now! (13/n) Image: Wikipedia

Color photo of a weathered stone plaque that reads "Here as he walked by on the 16th of October 1843, Sir William Rowan Hamilton in a flash of genius discovered the fundamental formula for quaternion multiplication..."
Dan Burns@the-physics-well.net · 2d ago

Sunset on the rim of crater Theophilus (right) on the Moon early this morning. The topography of its western crater wall can be seen in the shadow on the illuminated eastern rim. Cyrillus (center) and Catharina (left) complete this striking trio. Details in ALT. #astrophotography

3 large craters are shown in detail due to the low sun angle. One crater has sunlight just on its rim making it look like a bright oval. Meade 8"SCT with 2x barlow, ZWO ASI178MM camera. The best 40% of 578 frames stacked with autostakkert and processed with Registax and Photoshop
Dan Burns@the-physics-well.net · 2d ago

3 prominences swapping plasma yesterday morning on the limb of the Sun. IMppg had trouble aligning the frames so I used the stabilization feature in iMovie. That worked pretty well, but resulted in the moving camera effect. Lunt 50mm pressure-tuned, double stack, ZWO ASI178MM. #astrophotography

The Astro Society@astrosociety.org · last mo.

Are you ready for it? Our virtual conference, that is! Registration is now open and you don't want to miss our five programming tracks, opening night event, prestigious speaker lineup, and celebrating 250 years of astronomy in the United States and beyond. 🚀🌎 1/3

Bild
ThePhysicsShow@thephysicsshow.bsky.social · 3d ago

I recently recalled a film I saw in elementary school that ended in a hanging. With more research, I found it was An Occurence at Owl Creek Bridge, where the main character, Farquhar, is executed for trying to destroy a bridge during war. It was Farquharson who was on the Tacoma Narrows Bridge...

Dan Burns@the-physics-well.net · 4d ago

Not much happening on the limb of the Sun yesterday so I zoomed way in on this small, dim, prominence and watched it do its thing for 2 hours, as one does. A 15 s pause was taken between each 15s video for a 2 frame/minute real-time rate. Details in ALT. #astrophotography

Dan Burns@the-physics-well.net · 6d ago

Saturn's rings are baaaack! After connection problems with Firecapture, I switched to Sharpcap. It is unsettling to jump back down the learning curve, but I think this will be a good decision, eventually! Should be an OK apparition with altitudes >50 at my latitude. Details in ALT. #astrophotography

image of saturn with some cloud bands visible. the cassini division shows as a gap in the rings best seen on the ends. saturn casts a shadow on the rings in the lower right. Meade 8" SCT with 2x barlow and ZWO ASI662MC camera. The best 20% of 5443 frames were stacked with Autostakkert and processed with Registax and Photoshop. Video gain 313 with 55 ms exposure