NASA @NASA
What caused the brightest X-ray burst ever seen by our @NASAUniverse NICER telescope? 🤔 A massive thermonuclear flash from the remains of a star that exploded as a supernova. The explosion released as much energy in 20 seconds as the Sun does in 10 days. https://t.co/url5YzDobS https://t.co/U36gZLYMz6 — PolitiTweet.org