Asteroids are also called minor planets, not to be confused with dwarf planets like Pluto.

小星又被成为微型星，不要把它和像冥王星这样星混淆了。

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.

水星、金星、地球、火星、木星、土星、天王星、海王星和冥王星。

That's about the same distance as 337 round trips from Earth to Pluto.

这相当于从地球到冥王星往返337次距离。

Distant destinations offer " Plutones" of space if you're willing to " plan-it" .

当然更远还有冥王星，如果你把它当作星看话。

That’s about the same distance as 337 round trips from Earth to Pluto.

这相当于从地球到冥王星往返337次距离。

It's a " Marsing" and a sight for Pluto who would pan it.

看到冥王星和火星吵了起来。

We now know there's water on the Moon, on Mars, Pluto.

我们现在知道月球、火星、冥王星上都有水。

Today, we tell about Percival Lowell whose work led to the discovery of Pluto.

今天，我们讲述珀西瓦尔·洛厄尔，他工作导致了冥王星发现。

He died long before the search for Planet X resulted in the discovery of Pluto.

早在寻找星X并最终发现冥王星之前，他就去世了。

I told you, I want to file a declaration that Pluto is a planet.

我说了 我要填写冥王星是星声明。

Dad, pluto isn't a planet. It's shrinking because of corporations.

爸 冥王星不是一颗星 大公司在让它不断缩小。

Check out the bracelet, it's pretty cool, and it even includes Pluto!

看看这个手镯，它很酷，它甚至还有一个冥王星！

But, as Project Pluto's designers found, that is tricky to fit in a missile.

但根据冥王星计划设计者发现，这对于导弹来说是很棘手。

So that's what I tell people if they ask me if Pluto is a planet.

所以如果有人问我冥王星是不是星，我就会这么回答。

I say, “Tell me what a planet is first, and then we can discuss Pluto.”

“先告诉我什么是星，然后我们再来讨论冥王星问题。”

Pluto orbits the Sun on an elliptical, mildly-tilted path.

冥王星绕太阳运轨道是椭圆型，略微倾斜。

Pluto's orbit crosses Neptune's… more or less.

冥王星公转轨道会与海王星轨道相交… 差不多吧。

Water expands as it freezes, and cracks on Pluto's surface may be evidence of this.

水结冰后会膨胀，而冥王星表面裂缝可能就是这方面证据。

But researchers believe Pluto may have been born as a much warmer place.

但研究人员认为，冥王星诞生时可能是一个温暖得多地方。

The belt is home to thousands of massive icy objects, including former planet Pluto.

柯伊伯带是数千个巨大冰质天体聚集地，其中包括已被降级为星冥王星。