根据原文最后一段" I am hoping that everyone on the planet is saving some time to contemplate(凝视,沉思)the universe and to realize we are not alone.我希望地球上的每个人都能节省一些时间来思考宇宙,并意识到我们不是一个人。"可知作者写这篇文章是与读者一起研究宇宙中的科学奥秘...
阅读理解European astronomers(天文学1. What is the black hole like?家)say they have found the closestA. It has many stars.black hole to Earth ever discovered.B. It has a huge mass.The object is about 1,000 light yearsC. It is a place on Earth.光年)away. It's close enough that th...
(2022·江苏省前黄高级中学高二开学考试)Whenhydrogen(氢气)burns,theonlybyproductiswater—whichiswhyhydrogenhasbeenanattractivezero-carbonenergysourcefor decades.Yetthetraditionalprocessforproducinghydrogen,inwhichfossilfuelsareexposedto steam,isnotevenremotelyzero-carbon.Hydrogenproducedthiswayiscalledgrayhydrogen;if...
For instance, one of the most commonly used means of measuring distances across space is known as anAstronomical Unit(AU). Based on the distance between the Earth and the Sun, this unit allows astronomers to characterize the vast distances between the Solar planets and the Sun, and between ex...
Some astronomers work on purely theoretical problems and never use a telescope at all. You might not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them.观点意见的判断。根据题干要求注意文中大多数人的观点,发现原文的第一句...
Edwin Hubble(1889 - 1953) is the man who discovered the expanding universe. Hubble answered two of the biggest questions plaguing astronomers at the time. He determined that so-called spiral nebulae were, in fact, other galaxies, proving that the Universe extends well beyond our own galaxy. Hu...
So we can be sure that the spiral nebulae really are very distant galaxies, which is what some eighteenth-century astronomers guessed, but didn't have the instruments to prove.Now, one reason I told you this story is that today there are still plenty of situations when we see something ...
The birth of the first stars represents the beginning of a sequence that produced all the worlds and living beings of the universe. Simulations can be used to study the critical first steps that telescopes cannot yet see.
This is important. If Jupiter was in this spot, Earth wouldn't be here.这非常重要。如果木星在这个位置，地球就不会在这里了。The discovery, outside our Solar System, of giant planets similar to Jupiter but much closer to their star, posed a serious puzzle for astronomers, because giant ...
But all they have sent back have been images of planets inimical to life. Over the last 25 years, however, astronomers have discovered thousands of incredibly diverse planets, in our galaxy alone.但他们发回的都是与对生命有害的行星的图像。然而，在过去的25年里，天文学家仅在我们的星系中就发现...