The year is 1054. Imagine that you're walking home after a long day of work. It's very dark, no street lights, no cell phones.And then you happen to look up and when you do, you see an incredibly bright flash of light and then seemingly out of nowhere appears this bright light. In fact, it was so bright it would have been visible during the day. The people of the northern song dynasty would have considered this a profoundly significant astronomical event.In fact, it proclaimed that an abundantly enlightened ...

Galaxy Formation & Evolution - The Milky Way contains over 100 billion stars [2] - The sun orbits the galactic center approximately every 200 million years [3] - Galaxies, including the Milky Way, formed and evolved over 138 billion years [9] - Computer simulations allow observation of a galaxy's evolution across billions of years [10] Key Ingredients & Processes - Hydrogen gas and stars are the two most important ingredients in a galaxy [12] - Gravity is the most important law of physics governing galaxy evolution [12] - Galaxies convert hydrogen gas into stars [14] - Supernova explosions, occurring about once per century in the Milky Way, shape galaxies [16] Origin & Implications for Life - The Milky Way was forged in chaos, evolving from many tiny galaxies [18] - Frequent supernova events in the early chaotic phase were not conducive to the emergence of life [22] - Supernova explosions create key elements for life, such as carbon, oxygen, and iron [23] - The Earth and the Sun formed 45 billion years ago after the Milky Way settled into its ordered state [21]

First Ever ‘Double Supernova’ Found In Night Sky — What To Know https://t.co/ZhKYgaU6vf ...

Astronomical Discoveries - A supernova, resulting from the powerful explosion of a star, has been discovered by astronomers observing the night sky from the Southern Hemisphere [1] - The supernova appears to have detonated twice [1]

天文观测 - 首次在夜空中发现“双超新星”现象[1] 研究方向 - 该发现可能为超新星研究提供新视角[1]