“Are we alone? What's out there?”意为“我们是孤独的吗?那里是什么?”,“Looking up at the stars”意为“仰望星空”,“people have always wanted to learn more about space”意为“人们一直想更多地了解太空”,“and scientists work hard to find
阅读理解There are millions of stars and planets in space.What's the difference between stars and planets?Stars can give out heat and light, but planets cannot!The sun is one of the stars. Some planets are balls of rock and some are balls of gas. We live on the planet earth. It also...
What are stars made of?Question:What are stars made of?Stars:The sun is a G-type main-sequence star. It is one of at least 200 billion that are located in the Milky Way galaxy. There are a number of different types of star ranging in color from white and blue to red, orange and...
The sun is characterized as a yellow dwarf star and is medium in size compared to other stars. It is one of many stars which shine throughout the galaxy known as the Milky Way. The dwarf sun burns very hot and its central temperature has been estimated to be more than fifteen million d...
Arnold, William
Ⅳ.阅读理解There are millions of stars and planets in space. What's the difference between stars and planets? Stars can give out heat and light, but planets cannot. The sun is one of the stars. Some planets are balls of rock and some are balls of gas.We live on the earth. The cart...
Ⅲ阅读还原There are billions of stars and planets in space. What's79 known natural satellites and it is the biggest and heaviest the difference between the stars and the planets? 16.planet. 20.The other planets such as Uranus (The sun is one of the stars. Some planets are balls of王星...
The heaviest known neutron star has a mass equivalent to around 2.5 times the mass of the sun, while the lightest known black hole has a mass of around 5 times that of the sun. Thus there is a mass gap between these two types of dead stars which scientists are currently attempting to ...
There are many different types of telescopes available for those interested in exploring the night sky. Telescopes come in a variety of designs, some of which have been around since the 1600s. The first type of telescope ever designed was a refractor, designed by an eyeglass maker in the Net...
I have recently shown that one needs to take a global approach that considers the type of active galaxy (radio galaxies are one type), the rate of star formation, the so-called velocity dispersion of stars in the galactic bulge, the excitation level of the galaxy, the type of environment ...