Passage2Where does the orange snow come from?橙色的雪来自哪里?What is the colour of snow? Of course, it is white. But in some parts of Russi a and Eastern Europe, you can see orange snow!"The orange snow had something to do with the Sahara Desert," scientists said. There was a lar...
阅读二What is the colour of snow? Of course, it is white. But in some parts of Russi a and Eastern Europe, you can see orange snow!"The orange snow had something to do with the Sahar a Desert," scientists said. There was a large sandstorm in the Sahar a many years ago. Wind ...
In this colour image snapped by the down-looking Descent Stage camera, Perseverance dangles in mid-air as the Skycrane maneuver gently lowers it to the floor of Jezero crater. Credit: NASA/JPL-Caltech In the image above, Perseverance hangs on three nylon tethers...
What is Mars' asteroid belt?The Planet Mars:Mars is often called the Red Planet because, even with the naked eye, it has a red glow in the night sky. The red colour of the planet is because of all the oxidized iron (rust) on the surface of the planet....
Note the minimal product design. The colours are, for the most part, earthy and muted (save for the sky blue used on some items). Even the colour choices reflect the company’s “save the earth” mission. This is not a fashion brand. Your job is to define your brand personality traits...
【题目】What is colour? Why do som e of th e thin gs aroun d us look red, som e green, others blu e?Colours ar e really ma d e by reflected(反射) light. W e s e e colour becaus e most of th e t hings reflect light. Something is red, for it re flects most of ...
Where does the orange snow come from?What is the colour of snow? Of course, it is white.But in some parts of Russi a and Eastern Europe, you can see orange snow!"The orange snow has something to do with the Sahar a Desert," scientists said. There was a large sandstorm in the ...
as bright as Venus or Jupiter, Mars can usually be seen in all but the most light polluted skies, and tends to stand out due to its distinct orange colour. Watch for this planet to also become brighter and brighter in the sky each night, as we approach Mars Opposi...
the little moon (the radius of the Earth, measured by Eratosthenes in antiquity). With a simple proportion we can compute the period of the orbit of the little moon. The result is one hour and a half. The little moon would complete its orbit around the Earth every one hour and a half...
Another field that you can also enjoy with your telescope is the observation of double stars, many of them with beautiful colour contrasts, such as gamma Andromedae or the so-called Albireo of winter (HJ3945, in Canis Majoris). Here are some representations of how Jupiter and Saturn look wit...