orbit
/ˈɔːr.bɪt/ · noun / verb
An orbit is the curved path one object follows around another object in space.
ExampleThe Moon stays in orbit around Earth because gravity keeps pulling it inward.
Which sentence uses “orbit” correctly?
Vocabulary Mission · Ages 10–14
Space Words
学会 6 个高频太空词汇：读懂解释、观察例句、完成小测验。你不需要背一整本词典，只需要像探测器一样，一次锁定一个关键词。
6target words
1quiz per card
∞curiosity allowed
Tip: 点击每张卡片里的答案，系统会立即告诉你是否命中目标。
Mission Cards
每张卡都包含解释、例句、发音按钮视觉状态和一个互动小测。完成全部 6 题，就能解锁“词汇轨道稳定”状态。
eclipse
/ɪˈklɪps/ · noun / verb
An eclipse happens when one space object blocks the light from another, partly or completely.
ExampleDuring a solar eclipse, the Moon moves between Earth and the Sun.
What happens in an eclipse?
telescope
/ˈtel.ɪ.skoʊp/ · noun
A telescope is a tool that collects light so distant objects look clearer and closer.
ExampleWith a small telescope, Mia could see the rings of Saturn from her backyard.
Why do astronomers use telescopes?
gravity
/ˈɡræv.ə.ti/ · noun
Gravity is the force that pulls objects toward each other. It keeps planets, moons, and stars together.
ExampleGravity pulls you toward Earth, which is why you do not float away when you jump.
Which idea best matches “gravity”?
vacuum
/ˈvæk.juːm/ · noun
A vacuum is a space with almost no matter in it. Outer space is close to a vacuum, so there is very little air.
ExampleSound cannot travel well through the vacuum of space because sound needs particles to vibrate.
Which statement about a vacuum is true?
signal
/ˈsɪɡ.nəl/ · noun / verb
A signal is a message or piece of information sent by light, sound, radio waves, or another method.
ExampleThe rover sent a radio signal to Earth after it collected new data from Mars.
In space missions, a “signal” is usually...
Mission Status
完成小测后，这里会更新你的探索进度。目标：6/6，让所有词汇进入稳定轨道。