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4.6 billion years ago
- Some 4.6 billion years ago, our Sun was born from a cloud of interstellar gas and dust. It came from a giant molecular cloud — a collection of gas up to 600 light-years in diameter with the mass of 10 million Suns — which had been circling the Milky Way for who knows how many years.
www.astronomy.com/observing/the-beginning-to-the-end-of-the-universe-our-solar-systems-origin/The Beginning to the End of the Universe: Our solar system’s ...
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Jun 9, 2021 · How the sun formed. The sun was born about 4.6 billion years ago. Many scientists think the sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust known...
At its equator, the Sun completes one rotation in 25 Earth days. At its poles, the Sun rotates once on its axis every 36 Earth days. The part of the Sun we see from Earth – the part we call the surface – is the photosphere. The Sun doesn’t actually have a solid surface because it’s a ball of plasma.
Regarding the fixed stars, the Sun appears from Earth to revolve once a year along the ecliptic through the zodiac, and so Greek astronomers categorized it as one of the seven planets (Greek planetes, "wanderer"); the naming of the days of the weeks after the seven planets dates to the Roman era. [228] [229] [230]
Jan 27, 2022 · The sun formed first from the vast material, with the planets close behind. But how did a sea of swirling particles become the brightest star in our sky?
Oct 18, 2023 · Facts about our Sun, including its distance from Earth, what the Sun is made of, and how long it would take to drive there (hint: a long time!).
Sep 30, 2021 · Our study concluded that the majority of the dust and gas collapsed to form the Sun in fewer than 200,000 years. To put that into perspective, most of the matter in the Solar System coalesced and formed a central star in about the same amount of time it takes for the continents of Africa and South America to move 5 kilometers (3 miles) further ...
5 days ago · With a liquid water supply and ideal atmospheric conditions, the birth of life on Earth was possible with a young Sun. Boundaries: Emphasis is on the energy transfer mechanisms that allow energy from nuclear fusion in the Sun’s core to reach Earth and the way nucleosynthesis varies as a function of the mass of a star and the stage of its ...
