🔔#Earthquake (#sismo) M3.0 strikes 26 km NE of #Arecibo (Puerto Rico) 42 min ago. More info: https://m.emsc.eu/?id=1824702

🔔#Earthquake (#sismo) M2.9 strikes 77 km N of #Arecibo (Puerto Rico) 11 min ago. More info: https://m.emsc.eu/?id=1822472

🔔#Earthquake (#sismo) M3.1 strikes 19 km N of #Arecibo (Puerto Rico) 26 min ago. More info: https://m.emsc.eu/?id=1819143

🔔#Earthquake (#sismo) M3.0 strikes 51 km NW of #Arecibo (Puerto Rico) 19 min ago. More info: https://m.emsc.eu/?id=1814620

The #Arecibo message* could be detected up to about 12,000 light-years away from the Earth which is nearly halfway to the galactic centre (the #MilkyWay 🌌 is 105,700 light-years in diameter and the #SolarSystem is 26,000 light-years from the galactic centre). However, since Arecibo message was broadcasted in 1974, it has travelled only about 50 light-years 📏 so far https://www.scientificeuropean.co.uk/sciences/space/how-far-human-civilisation-is-detectable-in-space

* The message was aimed at #Messier13, about 25,000 light years from Earth https://en.wikipedia.org/wiki/Arecibo_message

#SETI

🔔#Earthquake (#sismo) M3.0 strikes 15 km NW of #Arecibo (Puerto Rico) 13 min ago. More info: https://m.emsc.eu/?id=1811256

@jannem Both sampling across the entire rotation phase and multiple viewing angles (orientation of an #asteroid relative to Earth is never constant)! are critical.

#radar data in use here is all from #Arecibo - the LPI has most of it at https://www.lpi.usra.edu/resources/asteroids/asteroid/?asteroid_id=2010LE15 if you want to see. With these observations, one beams a radio signal to the asteroid and observes the echo returned. Interesting observed parameters include Doppler shift, polarization and echo power.

🔔#Earthquake (#sismo) M3.4 strikes 71 km NW of #Arecibo (Puerto Rico) 14 min ago. More info: https://m.emsc.eu/?id=1810497

🔔#Earthquake (#sismo) M3.0 strikes 28 km NW of #Arecibo (Puerto Rico) 28 min ago. More info: https://m.emsc.eu/?id=1809412

🔔#Earthquake (#sismo) M3.4 strikes 67 km N of #Arecibo (Puerto Rico) 23 min ago. More info: https://m.emsc.eu/?id=1806737

🔔#Earthquake (#sismo) M3.0 strikes 73 km N of #Arecibo (Puerto Rico) 13 min ago. More info: https://m.emsc.eu/?id=1806716

🔔#Earthquake (#sismo) M2.8 strikes 20 km N of #Arecibo (Puerto Rico) 17 min ago. More info: https://m.emsc.eu/?id=1806157

🔔#Earthquake (#sismo) M2.6 strikes 20 km W of #Arecibo (Puerto Rico) 12 min ago. More info: https://m.emsc.eu/?id=1805719

🔔#Earthquake (#sismo) M3.0 strikes 24 km E of #Arecibo (Puerto Rico) 28 min ago. More info: https://m.emsc.eu/?id=1804806

🔔#Earthquake (#sismo) M3.2 strikes 57 km NW of #Arecibo (Puerto Rico) 14 min ago. More info: https://m.emsc.eu/?id=1804632

🔔#Earthquake (#sismo) M3.4 strikes 126 km NW of #Arecibo (Puerto Rico) 47 min ago. More info: https://m.emsc.eu/?id=1800668

🔔#Earthquake (#sismo) M2.6 strikes 10 km SW of #Arecibo (Puerto Rico) 17 min ago. More info: https://m.emsc.eu/?id=1797459

🔔#Earthquake (#sismo) M3.0 strikes 52 km NW of #Arecibo (Puerto Rico) 22 min ago. More info: https://m.emsc.eu/?id=1797366

🔔#Earthquake (#sismo) M2.9 strikes 13 km NW of #Arecibo (Puerto Rico) 22 min ago. More info: https://m.emsc.eu/?id=1791663

@flwwhtrbt Wow! 🤩 I knew #SuperTuxKart, like an early version, but I didn't know it has become such a #game! 🤯 Just saw the trailer and obv. you can race inside #Arecibo Observatory! 🥰 So great, this marvelous technical achievement is remembered there! Am installing right now! 🥳 #linux #gaming #LinuxGaming #astronomy