外星人如何发现地球？李永乐老师【2019诺贝尔物理学奖解读】

What changes in the human body when there is oxygen deficiency? There are new ways to treat cancer! [2019 Nobel Prize Interpretation 1/3]
   • 缺氧时人体会有什么变化？癌症治疗又有新方法！【2019诺贝尔医学奖解读】  

If aliens also explore the universe like humans, how do they discover the earth? This year's Nobel Prize in Physics was awarded to two scientists in recognition of their first discovery of planets outside the solar system. The method they used was called the radial velocity method, which relied on the physical principle of the star affected by the planets and moved red. The Pegasus 51-b was first discovered by this method. In addition, humans have invented the transit method to detect planets based on changes in brightness when the planet blocks the stars. Humans have used these methods to discover thousands of planets outside the Earth. If aliens want to find us, they should use this method. What is going on? Click on the video to see what you want to see, you can leave a message below!
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