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What Is a Planet?

SPACE.comElizabeth Howell

What Is a Planet?

Astronomers define a planet as an object that orbits the sun (but not another object), is round (or nearly so) and has cleared the area around its orbit.

2018年4月7日

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NASA discovers planet similar to Earth

NASA discovers planet similar to Earth

2015年7月24日

What does our planet look like from... - NASA Sun Science

What does our planet look like from... - NASA Sun Science

FacebookNASA Sun Science

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NASA finds Earth-size planet that could be habitable: ‘An exciting prospect’

NASA finds Earth-size planet that could be habitable: ‘An exciting prospect’

NEW YORK POSTBrooke Steinberg

2023年1月11日

短视频

新年购新鞋与新衣促销活动

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新年购新鞋与新衣促销活动

love._.planet (@love._.planet)’s videos with оригинальный звук - love._.planet

已浏览 36.7万次

love._.planet (@love._.planet)’s videos with оригинальный звук -

Planet Formation

Ecosystem Diversity

Ecosystem Diversity

YouTubeBozeman Science

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Inner Planets

YouTubeNASA Video

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Colliding Continents

Colliding Continents

YouTubeNaked Science

已浏览 214万次2018年2月14日

Solar System Planets

How many planets are there in the solar system?

How many planets are there in the solar system?

2021年9月7日

All the Planets In The Solar System Have Aligned - How To See Them

All the Planets In The Solar System Have Aligned - How To See Them

2022年12月23日

The curious new planets astronomers discovered in 2023

The curious new planets astronomers discovered in 2023

MashableElisha Sauers

2023年12月9日