How much of the solar system's mass is in the Sun?
The Sun contains about 99.8% of all the mass in our solar system.
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- Why do we always see the same side of the Moon?
“The Moon is tidally locked to Earth, which means it always shows us the same side.”
Reference: NASA
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Fun fact about Neil Armstrong's moonwalk
In 1963, baseball pitcher Gaylord Perry remarked, "They'll put a man on the moon before I hit a home run." On July 20, 1969, a few hours after Neil Armstrong set foot on the moon, Gaylord Perry hit his first of six home runs.
How many sunrises do astronauts on the ISS see each day?
The International Space Station orbits Earth about every 90 minutes, so astronauts see about 16 sunrises a day.