Question

克服困难达到目标的英语作文

Answer 1

In 1924, our modern cosmic images were laid. That's because the American astronomer, Edwin Haber, proved that our galaxy is not the only galaxy.. In fact, there are many other galaxies that are a huge void space between them.. To prove these, he must determine the distance of these galaxies. These galaxies are so far away, unlike the stars that they do appear fixe