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Posted

Last sentence is comical.

 

"For example, the waves given off by the cataclysmic final merger of GW150914 reached Earth after travelling over a billion light-years, as a ripple in spacetime that changed the length of a 4 km LIGO arm by a thousandth of the width of a proton, proportionally equivalent to changing the distance to the nearest star outside the Solar System by one hair's width.[37] This tiny effect from even extreme gravitational waves makes them observable on Earth only with the most sophisticated detectors."

 

hard to grasp these numbers.

  • 2 weeks later...
Posted

https://www.cbc.ca/news/technology/mars-oxygen-1.5997547

Quote

NASA has logged another extraterrestrial first on its latest mission to Mars: converting carbon dioxide from the Martian atmosphere into pure, breathable oxygen, the U.S. space agency said on Wednesday.

The unprecedented extraction of oxygen, literally out of thin air on Mars, was achieved Tuesday by an experimental device aboard Perseverance, a six-wheeled science rover that landed on the Red Planet on Feb. 18 after a seven-month journey from Earth.

In its first activation, the toaster-sized instrument dubbed MOXIE — short for Mars Oxygen In-Situ Resource Utilization Experiment — produced about five grams of oxygen, equivalent to roughly 10 minutes' worth of breathing for an astronaut, NASA said.

This is an astounding achievement.

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