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för 11 timmar sedan · Composition. The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass–energy of the universe) and antimatter.
- 13.787 ± 0.020 billion years
- At least 10⁵³ kg
- 9.9×10−27 kg/m³
för 11 timmar sedan · The Carnian Pluvial Episode was the cause for mass extinction of species inhabiting the earth at the time and played a major role in reshaping the environment for the next couple of millions of years. The Carnian Pluvial Episode (CPE) was an event on earth that took place at some point between 232 and 234 million years ago, when the earth’s ...
för 11 timmar sedan · The biggest of these bursts was sent to Earth on 11 May. More solar megastorms are coming If you, like me, slept through the mesmerising northern lights displays on the weekend — don’t worry ...
星系暈 是 螺旋星系 中，包括我們的 星系 － 銀河 的 銀暈 ，遠遠的延伸在星系盤面之外的部分，也是螺旋星系最容易看見的部分。. 星系暈 可以是：. 星系的 暗物質暈 。. 星系扁球體 和 暗物質暈 是與星系核心同心、且大致成球對稱。. 在 橢圓星系 ，星系的主 ...
för 11 timmar sedan · Aurora Banks Peninsula. This well-composed composite panoramic view looks due south from Banks Peninsula near Christchurch on New Zealand’s South Island. The base of a tower-like rocky sea stack is awash in the foreground, with stars of the Southern Cross at the top of the frame and planet Earth’s south celestial pole near center.
för 11 timmar sedan · 01. Maracanã Stadium in Rio de Janeiro is not only one of the largest stadiums in the world but also a symbol of football's importance in Brazilian culture. It hosted the final matches of the 1950 and 2014 FIFA World Cups. 02. Many Brazilian stadiums, including the iconic Maracanã, underwent significant renovations for the 2014 FIFA World Cup ...
Per Wikipedia: Tungsten is remarkable for its robustness, especially the fact that it has the highest melting point of all known elements, melting at 3,422 °C (6,192 °F; 3,695 K). It also has the highest boiling point, at 5,930 °C (10,706 °F; 6,203 K). Of all metals in pure form, tungsten has the lowest vapor pressure (at temperatures above ...
