🌌 SpacePicture of a Day: Time Spiral 🪐

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What's happened since the universe started? The time spiral shown here features a few notable highlights. At the spiral's center is the Big Bang, the place where time, as we know it, began about 13.8 billion years ago. Within a few billion years atoms formed, then stars formed from atoms, galaxies formed from stars and gas, our Sun formed, soon followed by our Earth, about 4.6 billion years ago. Life on Earth begins about 3.8 billion years ago, followed by cells, then photosynthesis within a billion years. About 1.7 billion years ago, multicellular life on Earth began to flourish. Fish began to swim about 500 million years ago, and mammals because walking on land about 200 million years ago. Humans first appeared only about 6 million years ago, and made the first cities only about 10,000 years ago. The time spiral illustrated stops there, but human spaceflight might be added, which started only 75 years ago, and useful artificial intelligence began to take hold within only the past few years. Explore Your Universe: Random APOD Generator

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HD image: LINK 🛸

Copyright: No copyright 🔭

Project Website: LINK 🚀

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👨‍🚀 How many people are in space right now? 👩‍🚀

12

Name	Craft
Oleg Kononenko	ISS
Nikolai Chub	ISS
Tracy Caldwell Dyson	ISS
Matthew Dominick	ISS
Michael Barratt	ISS
Jeanette Epps	ISS
Alexander Grebenkin	ISS
Butch Wilmore	ISS
Sunita Williams	ISS
Li Guangsu	Tiangong
Li Cong	Tiangong
Ye Guangfu	Tiangong