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結果 : how many years in a light year
2:32

How Many Years are in a Light Year? | The Speed of Light

2 Minute Classroom
160,139 回視聴 - 5 年前
5:29

Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting

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4:15

How Long Does It Take To Travel 1 Light Year | Science Of Space

Science Of Space
125,081 回視聴 - 5 年前
4:41

What Is a Light Year??

Conceptual Academy
311,941 回視聴 - 5 年前

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2:09

What is a Light Year? | The World Of Science

The World Of Science
17,212 回視聴 - 3 年前
2:55

Dazzling celestial light show expected after 80 years

As News
49 回視聴 - 1 日前
4:22

How Far is a Light-Year Actually?

Facts Collective
482 回視聴 - 2 年前
1:06

How far is a light year?

Australian Academy of Science
15,228 回視聴 - 7 年前
2:10

Light Years explained

Joe Collins
194,114 回視聴 - 14 年前
1:47

Light year & Milky Way - NASA Video

My Gosh
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9:47

What Is a Light Year?

The Organic Chemistry Tutor
11,845 回視聴 - 1 年前
3:12

Cosmic Queries - What is a Light Year?

Naked Science
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2:25

What is a Light Year?

Alpha Science Academy
717 回視聴 - 1 年前
0:59

A 'Light-Year' Of Water

Vsauce
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1:14

What Is A Light-Year?

TestTube 101
126,453 回視聴 - 9 年前
3:29

How Big Is A Light-year?

GOT Reacts
1,254 回視聴 - 4 年前
1:10

What is a Light Year for Children? 60 Second Science Questions for Kids - FreeSchool

Free School
112,165 回視聴 - 6 年前
1:22

Physics Lesson: Space – What is a Light Year? | Twig

Twig Science Reporter
165,894 回視聴 - 12 年前
1:20

1 light year is equal to how many years of the Earth?

adeliadick7539
33 回視聴 - 5 年前