A Red Giant is a luminous, expansive phase of a star's life, occurring when it exhausts its core hydrogen and begins fusing helium. This process causes the star to swell and cool, taking on a reddish hue. These celestial giants are crucial in the cosmic lifecycle, seeding the universe wit...
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Remove All Ads on Universe Today Join our Patreon for as little as $3! Get the ad-free experience for life A red giant will expand outward many times its original size. Our own Sun, for example will grow so large that it engulfs the orbits of Mercury, Venus and even Earth; although,...
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第4集 What Is A Red Giant 红巨星,恒星的一种衰变状态 2322016-09 8 第3集 What Are Stars Made Of 星星的故事 2882016-09 9 第2集 What Is The Milky Way 银河系 4112016-09 10 第1集 What Is The Universe 宇宙是什么 12442016-09 查看更多 ...
Red giant. Credit:NASA/ Walt Feimer Think big. Really big. Like, cosmic big. How big can things in the Universe get? Is a galaxy big? What about a supercluster? What is the biggest thing in the Universe? Our observable Universe is a sphere 96 billion light-years across, and the enti...
Thinking aloud, everything is governed by our rules in our universe. Another universe may have a different set of rules. In our universe, people are white, brown and black. In another universe, people could be blue, green or red. Our sky is blue. In the other universe, the sky could...
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The biggest star in the universe (that we know of), UY Scuti is a variable hypergiant with a radius around 1,700 times larger than the radius of the sun. To put that in perspective, the volume of almost 5 billion suns could fit inside a sphere the size of UY Scuti. ...
The universe is nowhere near an end. Our Sun itself, now 4.6 billion years old, has billions of years still to go. That should give us some breathing time. The Sun will remain much as it is for the next few billion years. During that time, however, it will be gradually heating up,...