How close could an astronaut get to the sun？
4:53
Why is Mars red?
8:50
How do astronauts get ready for space?
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How is gold made?
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A Merry Christmas | A Magical Christmas Adventure | Tia & Tofu | #christmas #kidsvideo
7:20
What's the deepest hole anyone has ever dug?
4:35
What would it be like to live on the moon?
7:02
Why can't airplanes fly to space?
6:16