But planetologists have discovered that Earth's very presence in this Goldilocks zone is itself due to an amazing stroke of luck. When the Solar System was still young, this zone came close to being taken over by the planet Jupiter.但行星学家发现，地球出现在这片“宜居带”本身就有惊人的运...
“The simple explanation for the Red Planet’s color is that its regolith, or surface material, contains lots of iron oxide — the same compound that gives blood and rust their hue.” However, the more complex answer is that during the formation of the planet, iron, a ...
Another problem area is the cast. Finding actors acceptable to film audiences can mean the difference between success and failure. Readers of the book use their imaginations to visualise characters and have very definite ideas about how characters should look and sound. This is where I think many...
Given its particular shape, calculating the Earth’s surface area requires a specific equation. Whereas determining the surface area of a sphere is a simple matter of multiplying pi by four, and these by the square of its radius (4 x 3.14159… x r²), to calculate the surface area of ...
An example of this ongoing work is the International Space Station. It orbits Earth and has astronauts from different countries on board, providing a continuous human presence in space. (尽管科学家们试图确保万无一失,但事故仍然可能发生。苏联的联盟11号和美国的挑战者号上的所有宇航员都在执行任务时...
What is the gravitational force of Mars? What is gravitational wave astronomy? The mass of the moon is about one eighty-first, and its radius one-fourth, that of the Earth. What is the acceleration due to gravity on the surface of the moon? What is the gravitational force of Jupiter?
What is Jupiter's atmosphere made of? What is Eris in space? What is Mercury's atmosphere made of? Venus has an atmosphere that is made primarily of what? What is the atmosphere of Uranus? What is the composition of the atmosphere of Venus?
I am a full-time astrophotographer, and I have used many different types of telescopes to both view and photograph the wonders of the night sky. Unlike the other articles littered across the web explaining that the ‘best telescope’ is the one they recommend on Amazon, I have some honest...
Neptune’s “surface” can therefore be said to be composed of about 80% hydrogen and 19% helium, with a trace amount of methane. The surface layer is also permeated by roving bands of clouds with varying compositions, depending on altitude and pressure. At the upper-level, temperatures are...
什么是太阳(What is the sun) The sun is a normal star, and there are about 100 million such stars in the Milky Way. Diameter: 1,390,000 km. Quality: 1.989e30kg Temperature: 5800 open (surface) 15.6m (core) The sun is the largest object in the solar system. It has 99.8 percent of...