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Extraterrestrial
Our Fears Were Not Unfounded, As 70,000 Years Ago Our Solar System Was Invaded By Another Star
Extraterrestrial
Having Flown 23 Billion Kilometers, This Photo Of Voyager 1 Is Thought-Provoking: Is Earth a "Zoo"?
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Extraterrestrial
The Solar System Moves 7 Billion Kilometres a Year, But The North Star Is Always Due North - Why Is That?
Extraterrestrial
Voyager 1 Has Flown 22.8 Billion Kilometres Away, How Did It Manage To Send Its Signal Back To Earth?
Extraterrestrial
How Long Does It Take For The Sun To Go Out Before Humans Notice It? Will It Be 8 Minutes Or 10,000 Years?
Extraterrestrial
What Are The Seven Stars Of The Big Dipper? How Big Are They? How Far Away Are They From The Earth?
Extraterrestrial
A Probe That Flew 22.8 Billion Kilometres And Finally Sent Back Pictures That Teach Mankind a Vivid Lesson
Extraterrestrial
How Long Would It Take For Humans To Reach Mars?
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Thousands Of Large Birds Live In India's Largest Rubbish Dump, So Why Do Locals Prefer To Starve Rather Than Eat Them?
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There Is No Air In Space To Provide Reaction Forces, So Where Does The Power To Move The Spacecraft Forward Come From?
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The Speed Of Light Is Not The Speed Limit Of The Universe, It Is As Slow As a Snail Compared To These Speeds
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Japanese Scientists Have Stored 50,000 Tonnes Of Ultra-Pure Water Underground.
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There Have Been Ways To Create Artificial Gravity For a Long Time, So Why Isn't Artificial Gravity Used On Space Stations?
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Why is the earth not perfect? Do planets more perfect than earth exist?