Recently in TRACKING WITH CLOSEUPS
Tuesday, January 19, 2021
Secrets of the “Nothing Grinder”
Posted at
13:18
Sunday, January 17, 2021
First Full Test of SLS Booster Fails as Engines Trigger Emergency Shutdown
Here is Scott Manley's quick look analysis of the SLS test firing abort. He notes that in 2020, there was discussion about skipping the “green run” test and proceeding directly to launch. Had they done that, it might have been a really bad day for SLS (but at least the first launch will not carry a crew, although that was also considered in 2020, as part of the push to return to the Moon by 2024).
Posted at
21:17
Saturday, January 16, 2021
I Painted My Entire Room with Musou Black—the World’s Blackest Paint
Posted at
14:04
Friday, January 15, 2021
Mathematicians Resurrect Hilbert’s 13th Problem
"Long considered solved, David Hilbert’s question about seventh-degree polynomials is leading researchers to a new web of mathematical connections." via @QuantaMagazine https://t.co/ZK6BAxhz12
— Quantum Gravity Res. (@emergencetheory) January 14, 2021
Did you know that every smooth cubic surface contains exactly 27 straight lines?
Posted at
12:24
Thursday, January 14, 2021
LED Lamps from Dubai: They Leave the West Behind
Only sold in Dubai: Philips LED lamps that use more LED chips running at lower current, resulting in greater efficiency (light output per electrical power consumed) and much longer life. The initial cost is higher, but the longer life will probably more than recover this. There's an internal voltage regulator which keeps the lamps from dimming or brightening when the mains voltage varies (but means they won't work with dimmers).
Posted at
15:55
Wednesday, January 13, 2021
The Many Forms of Brassica oleracea
The invention of broccoli. We totally nailed that one. pic.twitter.com/5dUN4ZUNqq
— Mispy (@mispy11) January 12, 2021
And don't forget Brassica’s wacky fractal sibling, Romanesco!
Posted at
13:06
Tuesday, January 12, 2021
Exploding Hardened Steel Parts with 150 Ton Hydraulic Press
Posted at
13:09
Monday, January 11, 2021
Moon Phases in 2021 (Including Libration and Position Angle)
For additional details, see my:
Posted at
12:06
Thursday, January 7, 2021
Vacuum Tubes: Getting Familiar with Getters
More about getters.
Posted at
16:20
Monday, January 4, 2021
Thunderstorm Sprite Lightning at 100,000 Frames per Second
Details from Astronomy Picture of the Day.
Posted at
19:51
Tighten This Bolt in Any Direction You Want
Tighten This Bolt in Any Direction You Want
— hackaday (@hackaday) January 4, 2021
Metal lathes are capable machines that played a large role in the industrial revolution, and an incredible tool to have at your disposal. But that doesn’t mean they can’t be used to have a little fun, as demon… https://t.co/4IbNbWfli5
Posted at
14:32
Saturday, January 2, 2021
Extracting Potassium Metal from Bananas
Posted at
12:09
Friday, January 1, 2021
How SpaceX Recovers Falcon 9 after Drone Ship Landings
Posted at
15:18
Thursday, December 31, 2020
Understanding Synthetic Aperture Radar
Posted at
13:31
Wednesday, December 30, 2020
Clam Pollution Sensors
In Warsaw, “the main water pump has 8 clams that have triggers attached to their shells. If the water gets too toxic, they close, and the triggers shut off the city’s water supply automatically.” https://t.co/iP8EcpYR04
— Steve Stewart-Williams (@SteveStuWill) December 30, 2020
Posted at
23:38
Tuesday, December 29, 2020
SpaceX's Launch Pad Problem
Posted at
13:02
Saturday, December 26, 2020
Reverse Engineering the Source Code of the BioNTech/Pfizer SARS-CoV-2 Vaccine
In this post, we'll reverse-engineer the actual mRNA code of the @BioNTech_Group/@pfizer SARS-CoV-2 vaccine, character for character. And along the way, this will also explain how the vaccine works. Surprisingly, there are some fun mysteries in there!https://t.co/HbjPFUXHUG
— Bert Hubert 🇪🇺 (@PowerDNS_Bert) December 25, 2020
Posted at
19:34
“It's a Christmas Miracle!”—The Flight and Rescue of Soviet Space Dogs Kometa and Shutka
Posted at
15:56
Thursday, December 24, 2020
Drawing a Drop of Water
Randall Rudd's instructions for drawing a single drop of water. pic.twitter.com/qHyVu8qRdy
— Pavel A. Samsonov (@PavelASamsonov) December 23, 2020
Posted at
11:37
Tuesday, December 22, 2020
Two Planets, Five Moons
The #GreatConjunction of #Jupiter and #Saturn thru my telescope just after 6pm. 4 of Jupiter's moons; Europa, Ganymede, Io & Callisto, and Saturn's Titan moon visible. Stacked many images for more clarity and color. Nexstar Celestron 6SE with Nikon D750 attached. #scwx #ncwx pic.twitter.com/vzP2IAuFnS
— Ed Piotrowski (@EdPiotrowski) December 22, 2020
Posted at
13:18