Passeggiata sulla Scala
Scorri dal Sole a Nettuno in scala reale, con indicatori di tempo di viaggio della luce lungo il percorso.
ESO/S. Guisard (www.eso.org/~sguisard) (CC BY 4.0)
Passeggiata sulla Scala
Everything here is at true scale: sizes and distances in the same proportion. Each pixel you scroll carries you 3000 km.
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 16,8 milioni km since Mercury.
The sunlight passing you now left the Sun 5 min 5 s ago.
Earth is ahead. Watch how small home turns out to be.
Marzo is still 58,8 milioni 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 4611 Earths side by side in the space you have crossed since Terra.
You are 14% of the way from Marzo to Cerere.
Still nothing. You have crossed 53,1 milioni km since Marzo.
The sunlight passing you now left the Sun 17 min 6 s ago.
Cerere is still 79,6 milioni 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 Marzo.
You are 17% of the way from Cerere to Giove.
Still nothing. You have crossed 122 milioni km since Cerere.
The sunlight passing you now left the Sun 33 min 8 s ago.
Giove is still 122 milioni km ahead.
You could line up 23.846 Earths side by side in the space you have crossed since Cerere.
You are 10% of the way from Giove to Saturno.
Still nothing. You have crossed 130 milioni km since Giove.
The sunlight passing you now left the Sun 54 min 5 s ago.
Saturno is still 389 milioni 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 Giove.
You are 70% of the way from Giove to Saturno.
Still nothing. You have crossed 519 milioni km since Giove.
The sunlight passing you now left the Sun 1 h 16 min ago.
Urano is still 1,31 miliardi km ahead.
You could line up 20.605 Earths side by side in the space you have crossed since Saturno.
You are 27% of the way from Saturno to Urano.
Still nothing. You have crossed 525 milioni km since Saturno.
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 h 3 min ago.
Urano is still 525 milioni km ahead.
You could line up 82.418 Earths side by side in the space you have crossed since Saturno.
You are 82% of the way from Saturno to Urano.
Still nothing. You have crossed 1,31 miliardi km since Saturno.
The sunlight passing you now left the Sun 2 h 48 min ago.
Nettuno is still 1,33 miliardi km ahead.
You could line up 34.840 Earths side by side in the space you have crossed since Urano.
You are 36% of the way from Urano to Nettuno.
Still nothing. You have crossed 740 milioni km since Urano.
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 h 37 min ago.
Nettuno is still 444 milioni km ahead.
You could line up 104.519 Earths side by side in the space you have crossed since Urano.
You are 91% of the way from Urano to Nettuno.
Still nothing. You have crossed 129 milioni km since Nettuno.
The sunlight passing you now left the Sun 4 h 24 min ago.
The Kuiper belt: a ring of icy worlds so spread out that after Pluto, New Horizons flew close to just one of them.
Plutone is still 906 milioni km ahead.
You could line up 50.798 Earths side by side in the space you have crossed since Nettuno.
You are 55% of the way from Nettuno to Plutone.
Still nothing. You have crossed 906 milioni km since Nettuno.
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 h 15 min ago.
Plutone is still 129 milioni km ahead.
Scroll down inside the frame to fly outward, or start the autopilot below.
Journey's end
Look back. That bright star is the Sun.
Tabella dati (testo alternativo)
| Mondo | Diametro | Distanza dal Sole | Tempo di viaggio della luce dal Sole | px |
|---|---|---|---|---|
| Mercury | 4879 km | 0,387 au | 3 min 13 s | 19.303 |
| Venere | 12.104 km | 0,723 au | 6 min 1 s | 36.070 |
| Terra | 12.742 km | 1 au | 8 min 19 s | 49.866 |
| Marzo | 6779 km | 1,52 au | 12 min 40 s | 75.981 |
| Cerere | 939 km | 2,77 au | 23 min 0 s | 137.907 |
| Giove | 139.822 km | 5,2 au | 43 min 16 s | 259.447 |
| Saturno | 116.464 km | 9,54 au | 1 h 19 min | 475.555 |
| Urano | 50.724 km | 19,2 au | 2 h 40 min | 956.886 |
| Nettuno | 49.244 km | 30,1 au | 4 h 10 min | 1.499.465 |
| Plutone | 2377 km | 39,6 au | 5 h 29 min | 1.974.125 |
Gli strumenti e le lezioni utilizzano modelli semplificati solo per l’apprendimento, non devono essere utilizzati per la navigazione, la pianificazione delle missioni o qualsiasi decisione operativa. I certificati sono gratuiti e non accreditati. Leggi il disclaimer sui contenuti educativi