Most stars are primarily made out of the element hydrogen. The second most common element in stars is helium. Stars produce helium from hydrogen in a...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
This type of research, Benneke said, is leading toward a final goal of ''being able to study the earth-like planets. '' ''We are not quite there yet. '' he said, ''but this is really exciting. ''【小题1】What can we learn about K2-18b?A.It is a planet closest to the sun...
SPACE: THE FINAL FRONTIER “Are we alone? What’s out there?” Looking up at the stars, people have always wanted to learn more about space, and scientists work hard to find answers. They make vehicles to carry brave people into space to find out the secrets of the universe. Apollo 11...
Spiral galaxies are made of stars, planets, moons, asteroids, comets, black holes, dust, gas, and any other type of stellar object found in any...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...
In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on Mars by the 2030s.
The latter two are not formed from cinnabar. Though all three can cause mercury poisoning, organic mercury is the most toxic. It takes 1,000 times the amount of mercury from cinnabar to reach the neurotoxicity levels of methylmercury. When mercury is inhaled in large amounts, it's hazardous...
The universe is very big. What is the universe made of? A. stars and planets B. gas and dust C. matter and energy D. water and air 相关知识点: 试题来源: 解析 C。宇宙是由物质和能量组成的,“matter and energy”是“物质和能量”。“stars and planets”是“星星和行星”,“gas and dus...
So lacking conclusive evidence, scientists couldn't convince themselves of the composition of Uranus's clouds.But equipment and techniques are improving all the time - and an intermational team of astrono-ners have found a new way to study Uranus. Led by scientists Patrick Irwin of the ...
Looming larger still are the supermassive black holes skulking in galactic cores, the repositories of millions to billions of stars’ worth of matter [source: Lemonick]. What mayhem might one of these black beasts bring if it formed, or passed, near our solar system? As with most ...
What are the inner planets made of? How was Ceres formed? What does the name Eris mean? The Earth's atmosphere is mostly composed of which two gases? Is Eris an extrasolar planet? Do gas planets have an atmosphere? Do all terrestrial planets have an atmosphere?