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#meteors

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Two imposing parallel ridges rise up in an otherwise flat landscape of trees, and lakes, and bogs. From whence came these topographical aberrations?

It seems the cosmos tossed a 'pebble' into a shallow Silurian sea. These granite ridges are part of the inner rim of the impact crater. This precambrian granite, typically overlain by limestone, is 100+ meters above its normal level in the area - the geologists call this "basement uplift." 1/n

Space Weather

youtube.com/watch?v=oSXAsklZLc

Meteor Shower alert: The Geminids meteor shower peaks during tonight and tomorrow night, 13/14 Dec. A live stream from a receiver detecting reflections from a distant analogue TV transmitter on 61.26 MHz is now on Youtube. I used to do this type of detection 10-20 years ago when analogue TV was common in Europe.

Sadly the locations of TX and RX are not disclosed, but I presume the RX is in one of the southern US states, detcting signals from a Central American TV transmitter.

youtube.com/watch?v=oSXAsklZLc

#geminids
#meteors

"Skywatchers, get ready to witness some celestial activity as the Leonids and Northern Taurids meteor showers peak in mid-November."

From @USAToday: "The Leonid meteor shower is caused by space debris from Comet 55P/Tempel-Tuttle, which collides with Earth's atmosphere. Two independent discoveries of the comet were made by Ernst Tempel in 1865 and Horace Tuttle in 1866, according to NASA."

flip.it/k3nvnh

USA TODAY · Leonid meteor shower 2024: A visual guide to where and when to viewBy Janet Loehrke
Continued thread

For now, the mass of #satellite 🛰️ disposals is just 3% 📊 of the natural input of #meteors ☄️ from space 🌌. But in a future with 75,000 satellites, the injected humanmade mass rises to 40% 📈 that of meteors. Concerns are mostly focused on #aluminum, the most common component in satellites. Aluminum chloride is easily split apart by light, freeing the chlorine to destroy #ozone. science.org/content/article/bu