Most people picture the Moon just above the clouds
The gap is far bigger than it feels
Earth to Moon
Could all the planets fit in the gap between Earth and the Moon?
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Sunlight and distance
On average, light takes 3.2 minutes to reach Mercury and 8.3 minutes to reach Earth.
How long does it take to reach Neptune?
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Light is incredibly fast. It could circle Earth around 7.5 times in a single second, yet the Solar System is so vast that Neptune is still more than four hours of light-travel away from the Sun.
At Boeing 747 speed, that same trip would take about 570 years.
A 747 flight between Uranus and Neptune would take around 270 years, that's longer than the USA has existed!
Farther planets have longer years for two reasons.
Their orbits are enormous.
And they move more slowly.
Mercury
88 Earth days47 km/s
A single year on Neptune lasts longer than a human lifetime.
In that same time, Mercury races around the Sun about 684 times.
Neptune has much farther to travel and it moves almost 9× slower than Mercury.