a-ma-zing

makes you surprised

adj.惊人

as-te-roid

a small rocky body going around the sun

n.小行星

as-ter-oids

a small rocky body orbiting the sun

n.小行星

co-met

celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun

n.彗星

ho-ri-zon

the line where the earth and sky appear to meet

n.地平线

hot-spot

special areas to click on to see more

n.热点

rough

having an uneven or irregular surface; not smooth or level

adj.粗暴

sci-en-tists

experts in science, people who study science

n.科学家

space-craft

a ship that flies in space

n.太空船／宇宙航行器

ste-roids

drugs that may make people bigger, better or faster

n.类固醇

sur-face

the top, or the outer layer

n.表面／外观

flew

to go somewhere by air or in space

v.飞

ho-ri-zon

the line where the earth and sky appear to meet

n.地平线

hot-spot

special areas to click on to see more

n.热点

So-lar Sys-tem

the eight planets and their moons traveling around the sun

n.太阳系

space-craft

a ship that flies in space

n.太空船／宇宙航行器

stem

the main body or stalk of a plant or shrub, usually rising above ground

n.干茎

bil-lion

a very large number, equal to 10^9

No.十亿

ex-plor-ing

to study or look at something in a careful way to lean more about it

v.探索

ho-ri-zon

the line where the earth and sky appear to meet

n.地平线

hot-spot

special areas to click on to see more

n.热点

launched

to send or shoot a rocket into outer space / to get moving

v.发射／推出

So-lar Sys-tem

the eight planets and their moons traveling around the sun

n.太阳系

space-craft

a ship that flies in space

n.太空船／宇宙航行器

stem

the main body or stalk of a plant or shrub, usually rising above ground

n.干茎

cra-ters

large holes in the ground, shaped like a bowl, often caused by a fast moving rock from space

n.陨石坑

hot-spot

special areas to click on to see more

n.热点

sci-en-tists

experts in science, people who study science

n.科学家

strange

not usual, hard to understand

adj.奇怪／陌生

sur-face

the top, or the outer layer

n.表面／外观

ash

the powdery residue left after the burning of a substance or emitted by a volcano

n.灰

as-tro-no-mer

an expert in or student of astronomy

n.天文学家

dis-co-vered

found, uncovered

v.发现    

ho-ri-zon

the line where the earth and sky appear to meet

n.地平线

hot-spot

special areas to click on to see more

n.热点

probe

physically explore or examine (something) with the hands or an instrument

v.探测

sug-ges-tion

an idea or plan

n.建议