A. Planets are small bodies. B. Planets are stars. C. Planets are large bodies that move around stars. D. Planets are comets. 相关知识点: 试题来源: 解析 C。这句话的意思是行星是围绕恒星运行的大天体,答案是 C。A 选项表示行星是小天体;B 选项表示行星是恒星;D 选项表示行星是彗星,均不符合...
What is the name of the force that keeps the planets in orbit around the sun? A. Gravity B. Magnetism C. Electricity D. Friction 相关知识点: 试题来源: 解析 A。本题考查对天体运行的了解。引力使行星围绕太阳运行,所以答案是 A。B 选项磁力不是使行星围绕太阳运行的主要力量;C 选项电力不是使...
Answer and Explanation:1 There are seven f orbitals, six of which are formed of six 'lobes' each, centered at the nucleus, while the remaining orbital is composed of two lobes... Learn more about this topic: Electron Orbitals | Definition, Subshells & Shapes ...
Question: What is planetary habitability? Habitat: Habitat is the natural place where an organism lives and grows in the natural environment. The habitat of organisms supports the survival and reproduction of certain species. Answer and Explanation: ...
The sun, Earth and the moon are aligned, but because the moon’s orbit is not exactly in the same plane as Earth’s orbit around the sun, they rarely form a perfect line. When they do, we have a lunar eclipse as Earth's shadow crosses the moon's face. Waning gibbous: More than ...
21:39 What is that funny loop in the orbit of Mars? This is known as retrograde motion. This arises because the orbital velocity of Earth (about 30 km/sec) is a little bit larger than that of Mars (about 24 km/sec). So, in opposition (when Mars is in the opposite position in th...
So this kind of periodic orbit is only a phase in a comet's life.A phase that just precedes its final breakup.We’ve seen comets do that, going toward the Sun and then come back around ,torn into pieces. Professor: But lots of comets aren't like that.They come in, pass behind ...
[01:57.88]and positions of planets and other space bodies. [02:03.12]Scientists with the American space agency NASA [02:06.44]use pi to calculate when parachutes should open [02:10.24]as a vehicle splashes down on Earth or lands on Mars. ...
How do we use earth‘s oceans 132018-05 2 HOW CAN PEOPLE RUIN THE SOIL 62018-05 3 WHERE DOES SOIL COME FROM 62018-05 4 waves of erosion 82018-05 5 WHAT keeps THE planets in orbit 182018-05 6 HOW CAN YOU IDENTIFY A MINERAL 132018-05 7 FORCES THAT SHAPE EARTH's GRAVITY 72018-04 ...
Mostthings in space move roughly in a circle, so centripetal force plays a big role in space exploration. It governs how satellites orbit our planet, how the moon orbits Earth, and how the rest of the solar system's planets orbit the sun. ...