斯卡爾步道

Keep scrolling. Every picture you have seen of the solar system squeezed this emptiness out.

Mercury is ahead, where sunlight is almost seven times stronger than on Earth.

Still nothing. You have crossed 1680万 km since 水星.

The sunlight passing you now left the Sun 5分钟 5秒 ago.

Earth is ahead. Watch how small home turns out to be.

Mars is still 5880万 km ahead.

A radio message from Earth takes between 3 and 22 minutes to reach Mars, depending on where the two planets are.

You could line up 4,611 Earths side by side in the space you have crossed since 地球.

You are 14% of the way from Mars to 穀神星.

Still nothing. You have crossed 5310万 km since Mars.

The sunlight passing you now left the Sun 17分钟 6秒 ago.

穀神星 is still 7960万 km ahead.

You are inside the asteroid belt. Did you hit anything? On average the asteroids are about a million kilometres apart.

You could line up 12,497 Earths side by side in the space you have crossed since Mars.

You are 17% of the way from 穀神星 to 木星.

Still nothing. You have crossed 1.22亿 km since 穀神星.

The sunlight passing you now left the Sun 33分钟 8秒 ago.

木星 is still 1.22亿 km ahead.

You could line up 23,846 Earths side by side in the space you have crossed since 穀神星.

You are 10% of the way from 木星 to 土星.

Still nothing. You have crossed 1.3亿 km since 木星.

The sunlight passing you now left the Sun 54分钟 5秒 ago.

土星 is still 3.89亿 km ahead.

Voyager 1 took about 20 months to fly from Jupiter to Saturn.

You could line up 30,529 Earths side by side in the space you have crossed since 木星.

You are 70% of the way from 木星 to 土星.

Still nothing. You have crossed 5.19亿 km since 木星.

The sunlight passing you now left the Sun 1小时 16分钟 ago.

天王星 is still 13.1亿 km ahead.

You could line up 20,605 Earths side by side in the space you have crossed since 土星.

You are 27% of the way from 土星 to 天王星.

Still nothing. You have crossed 5.25亿 km since 土星.

Uranus orbits twice as far from the Sun as Saturn. The farther out you go, the emptier it gets.

The sunlight passing you now left the Sun 2小时 3分钟 ago.

天王星 is still 5.25亿 km ahead.

You could line up 82,418 Earths side by side in the space you have crossed since 土星.

You are 82% of the way from 土星 to 天王星.

Still nothing. You have crossed 13.1亿 km since 土星.

The sunlight passing you now left the Sun 2小时 48分钟 ago.

海王星 is still 13.3亿 km ahead.

You could line up 34,840 Earths side by side in the space you have crossed since 天王星.

You are 36% of the way from 天王星 to 海王星.

Still nothing. You have crossed 7.4亿 km since 天王星.

Voyager 2 needed about three and a half years to cross this gap, from Uranus in 1986 to Neptune in 1989.

The sunlight passing you now left the Sun 3小时 37分钟 ago.

海王星 is still 4.44亿 km ahead.

You could line up 104,519 Earths side by side in the space you have crossed since 天王星.

You are 91% of the way from 天王星 to 海王星.

Still nothing. You have crossed 1.29亿 km since 海王星.

The sunlight passing you now left the Sun 4小时 24分钟 ago.

The Kuiper belt: a ring of icy worlds so spread out that after Pluto, New Horizons flew close to just one of them.

冥王星 is still 9.06亿 km ahead.

You could line up 50,798 Earths side by side in the space you have crossed since 海王星.

You are 55% of the way from 海王星 to 冥王星.

Still nothing. You have crossed 9.06亿 km since 海王星.

New Horizons, one of the fastest spacecraft ever launched, took nine and a half years to reach Pluto. Sunlight gets to Pluto's average distance in about five and a half hours.

The sunlight passing you now left the Sun 5小时 15分钟 ago.

冥王星 is still 1.29亿 km ahead.