The Outburst Clouds of Star AG Car

What created these unusual clouds? At the center of this 2021 Hubble image sits AG Carinae, a supergiant star located about 20,000 light-years away in the southern constellation Carina. The star’s emitted power is over a million times that of the Sun, making AG Carinae one of the most luminous stars in our Milky Way galaxy. AG Carinae and its neighbor Eta Carinae belong to the scarce Luminous Blue Variable (LBV) class of stars, known for their rare but violent eruptions. The nebula that surrounds AG Car is interpreted as a remnant of one or more such outbursts. This nebula measures 5 light-years across, is estimated to contain about 10 solar masses of gas, and to be at least 10,000 years old. This Hubble image, taken to commemorate Hubble’s 31st launch anniversary, is the first to capture the whole nebula, offering a new perspective on its structure and dust content. The LBVs represent a late and short stage in the lives of some supergiant stars, but explaining their restlessness remains a challenge to humanity’s understanding of how massive stars work. via NASA

Wikipedia article of the day for May 26, 2021

Wikipedia article of the day is Yazid I. Check it out: Article-Link Summary: Yazid I (c. 646 – 683) was the second caliph of the Umayyad Caliphate, ruling from April 680 until his death. His appointment, the first hereditary succession to the caliphate in Islamic history, was opposed by several Muslim grandees from Medina, including Muhammad’s grandson Husayn ibn Ali. Husayn refused to recognize Yazid following his accession and left for Kufa in Iraq to lead a revolt, but was killed in the Battle of Karbala. To suppress the subsequent rebellion in Arabia, Yazid sent an army that captured and sacked Medina. Next, Mecca was besieged for several weeks until the army withdrew as a result of Yazid’s death. The caliphate fell into a decade-long civil war known as the Second Fitna, ending with the establishment of the Marwanid dynasty. Yazid is considered an illegitimate ruler and a tyrant by many Muslims. Modern historians consider him a capable ruler, albeit less successful than his father Mu’awiya I, whose style of governance he continued.

Picture of the day for May 26, 2021

Wikipedia picture of the day on May 26, 2021: Inventor Nikola Tesla in December 1899, reading in his laboratory of Colorado Springs next to his giant “magnifying transmitter” high voltage generator while the machine produces huge bolts of electricity. This photo was in fact a promotional stunt by photographer Dickenson V. Alley. More Info