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Kuyenda kwa Scale
Kutsegula tsamba lonseZonsezi pano ndi pa mlingo woyenera: kukula ndi makilomita ali ndi kusiyana kofanana. Kawirikawiri, pixel iliyonse yomwe mumayenda nayo imakubweretserani 3,000 km.
Mudzaona kuti pazithunzi zonse zomwe mwaona za chilengedwe chonse, pali kuwala kokwanira.
Mercury ndi yotsatira, komwe mwanga wa dzuwa ndi pafupifupi zaka zisanu zolimba kuposa padziko lapansi.
Sichoncho. Mudapita 16.8 million km kuyambira Mercury.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 5 min 5 sec zaka zapitazo.
Dziko ndi patsogolo. Onani momwe nyumba yaying'ono imawonekera kuti ndi yotani.
Mars ndibe 58.8 million km kumbuyo.
Mlandu wa radio kuchokera kudziko limatenga pakati pa 3 ndi 22 mphindi kuti afike Mars, malinga ndi komwe maplaneti awiri ali.
Mukhoza kugwirizana 4,611 Earths mbali ndi mbali mu malo inu anapita kuchokera Dziko.
Mu ndi 14% ya njira kuchokera Mars kuti Ceres.
Sichoncho. Mudapita 53.1 million km kuyambira Mars.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 17 min 6 sec zaka zapitazo.
Ceres ndibe 79.6 million km kumbuyo.
Mukupita m’chigawo cha ma asteroid. Kodi mwafikapo pa chinthu china? Ma asteroid amapita pafupi ndi dziko lapansi pafupifupi makilomita miliyoni.
Mukhoza kugwirizana 12,497 Earths mbali ndi mbali mu malo inu anapita kuchokera Mars.
Mu ndi 17% ya njira kuchokera Ceres kuti Jupiter.
Sichoncho. Mudapita 122 million km kuyambira Ceres.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 33 min 8 sec zaka zapitazo.
Jupiter ndibe 122 million km kumbuyo.
Mukhoza kugwirizana 23,846 Earths mbali ndi mbali mu malo inu anapita kuchokera Ceres.
Mu ndi 10% ya njira kuchokera Jupiter kuti Saturn.
Sichoncho. Mudapita 130 million km kuyambira Jupiter.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 54 min 5 sec zaka zapitazo.
Saturn ndibe 389 million km kumbuyo.
Voyager 1 inatenga pafupifupi miyezi 20 kuti ipite kuchokera ku Jupiter kupita ku Saturn.
Mukhoza kugwirizana 30,529 Earths mbali ndi mbali mu malo inu anapita kuchokera Jupiter.
Mu ndi 70% ya njira kuchokera Jupiter kuti Saturn.
Sichoncho. Mudapita 519 million km kuyambira Jupiter.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 1 hr 16 min zaka zapitazo.
Uranus ndibe 1.31 billion km kumbuyo.
Mukhoza kugwirizana 20,605 Earths mbali ndi mbali mu malo inu anapita kuchokera Saturn.
Mu ndi 27% ya njira kuchokera Saturn kuti Uranus.
Sichoncho. Mudapita 525 million km kuyambira Saturn.
Uranus orbits awiri mozungulira kuchokera ku dzuwa monga Saturn.The mbali yaitali inu kupita, the wonse adzakhala.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 2 hr 3 min zaka zapitazo.
Uranus ndibe 525 million km kumbuyo.
Mukhoza kugwirizana 82,418 Earths mbali ndi mbali mu malo inu anapita kuchokera Saturn.
Mu ndi 82% ya njira kuchokera Saturn kuti Uranus.
Sichoncho. Mudapita 1.31 billion km kuyambira Saturn.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 2 hr 48 min zaka zapitazo.
Neptune ndibe 1.33 billion km kumbuyo.
Mukhoza kugwirizana 34,840 Earths mbali ndi mbali mu malo inu anapita kuchokera Uranus.
Mu ndi 36% ya njira kuchokera Uranus kuti Neptune.
Sichoncho. Mudapita 740 million km kuyambira Uranus.
Voyager 2 inafunika zaka zitatu ndi theka kuti ipite kudzera m'chipinda ichi, kuchokera ku Uranus mu 1986 kupita ku Neptune mu 1989.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 3 hr 37 min zaka zapitazo.
Neptune ndibe 444 million km kumbuyo.
Mukhoza kugwirizana 104,519 Earths mbali ndi mbali mu malo inu anapita kuchokera Uranus.
Mu ndi 91% ya njira kuchokera Uranus kuti Neptune.
Sichoncho. Mudapita 129 million km kuyambira Neptune.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 4 hr 24 min zaka zapitazo.
Kuiper belt: chingwe cha madziko otentha omwe adagawidwa kuti pambuyo pa Pluto, New Horizons idadutsa pafupi ndi imodzi mwa iwo.
Pluto ndibe 906 million km kumbuyo.
Mukhoza kugwirizana 50,798 Earths mbali ndi mbali mu malo inu anapita kuchokera Neptune.
Mu ndi 55% ya njira kuchokera Neptune kuti Pluto.
Sichoncho. Mudapita 906 million km kuyambira Neptune.
New Horizons, imodzi mwa ndege zazikulu kwambiri zomwe zidatulutsidwa, zinatenga zaka zisanu ndi zitatu kuti zizifika ku Pluto.Chithunzi cha dzuwa chimafika pa mtunda wa Pluto pafupifupi maola asanu ndi awiri.
Mdima wa dzuwa womwe umapita ku inu unachoka pa dzuwa 5 hr 15 min zaka zapitazo.
Pluto ndibe 129 million km kumbuyo.
Scroll pansi m'mphepete mwa frame kuti atembenuke, kapena kuyambitsa autopilot pansipa.
Kutha kwa ulendo
Taganizirani zapitazo. Chithunzicho ndi cha dzuwa.
Tabula ya deta (malemba osiyanasiyana)
| World | Kutalika | Kuchokera ku Sun | Kuwala-kuyenda nthawi kuchokera ku dzuwa | px |
|---|---|---|---|---|
| Mercury | 4,879 km | 0.387 au | 3 min 13 sec | 19,303 |
| Venus | 12,104 km | 0.723 au | 6 min 1 sec | 36,070 |
| Dziko | 12,742 km | 1 au | 8 min 19 sec | 49,866 |
| Mars | 6,779 km | 1.52 au | 12 min 40 sec | 75,981 |
| Ceres | 939 km | 2.77 au | 23 min 0 sec | 137,907 |
| Jupiter | 139,822 km | 5.2 au | 43 min 16 sec | 259,447 |
| Saturn | 116,464 km | 9.54 au | 1 hr 19 min | 475,555 |
| Uranus | 50,724 km | 19.2 au | 2 hr 40 min | 956,886 |
| Neptune | 49,244 km | 30.1 au | 4 hr 10 min | 1,499,465 |
| Pluto | 2,377 km | 39.6 au | 5 hr 29 min | 1,974,125 |
Almost every picture of the solar system lies. To fit on a page, the planets are squeezed together and blown up in size. Walk it at true scale and you discover the real star of the show: empty space.
The solar system is mostly empty space, and that emptiness is the whole story.
Look
Most pictures of the solar system squeeze the planets together like beads on a string, and draw them far too big. They have to: at true scale, a page would be almost completely empty.
Guess first: if the Sun were a beach ball, how far away would Earth be? A step? A room? A street?
A street. With the Sun as a 1-metre ball, Earth is a 9 mm pea about 107 metres away: roughly the length of a football pitch. Keep that picture in mind as you travel.
The Scale Walk above is drawn at true scale: sizes and distances in the same proportion. Every pixel you scroll carries you 3,000 km. Scroll inside the frame, press Next world, or tap a planet on the journey map at the top.
- The journey map is to scale too. The white marker is you. Notice how the Sun and the four inner planets crowd together at the far left.
- The odometer counts kilometres and the time sunlight has needed to get where you are.
- When you stop near a world, the camera locks on and leans in (the zoom is shown next to the scale bar), and a card tells you where you are.
- Earth, a globe 12,742 km across, is almost 50,000 scrolled pixels from the Sun. Neptune is about 1.5 million pixels away.
Notice how much of the trip is just black, with only a few lines of narration drifting past. That is the real solar system: tiny worlds separated by enormous emptiness.
Understand
A scale model divides every length by the same number. Here the number is 3,000: 3,000 km of real space becomes 1 pixel.
| World | Real diameter | Diameter at 1 px = 3,000 km | Distance from Sun | At this scale |
|---|---|---|---|---|
| Sun | 1,391,400 km | 464 px | 0 | 0 |
| Earth | 12,742 km | 4 px | 149.6 million km | 49,866 px |
| Jupiter | 139,822 km | 47 px | 778.3 million km | 259,437 px |
| Neptune | 49,244 km | 16 px | 4,498 million km | 1,499,000 px |
A handy comparison uses the Sun as a 1-metre ball. Divide everything by the Sun’s diameter (1.39 million km):
- Earth is a 9 mm pea, 107 m away.
- Jupiter is a 10 cm grapefruit, 560 m away.
- Neptune is a 3.5 cm marble, 3.2 km away.
- The nearest star, Proxima Centauri, would be another ball about 29,000 km away: more than two thirds of the way around the real Earth.
Try the autopilot at 1×, the real speed of light. You move 100 pixels per second, which feels slow on screen. Real sunlight really does need 8 minutes to reach Earth and more than 4 hours to reach Neptune. The faster settings compress time, not distance: the autopilot still brakes and pauses at every world.
Guess first: scrolling with a mouse wheel, are you moving faster or slower than light?
Much faster. A brisk scroll carries you millions of kilometres per second, often ten or more times the speed of light; the speed readout under the odometer shows it. Even so, the outer planets take a long time to reach. That is how big the distances are.
Master
Two separate compressions distort normal diagrams: the size scale and the distance scale. The ratio of the Sun-Neptune distance (4.5 × 10⁹ km) to Earth’s diameter (1.27 × 10⁴ km) is about 350,000. A screen 1,000 pixels tall can resolve a range of about 1,000, so no single static image can show both the planets and their spacing. Interactive zoom, logarithmic axes or a scroll-length model like this one are the only honest options.
This is also why the orrery on this site offers two modes. Readable scale compresses distance with a square root (r_screen ∝ √r) and draws planets at fixed legible sizes. True scale is linear in both size and distance, so the planets shrink to sub-pixel dots.
The emptiness has consequences for spaceflight. Travelling between planets is not like driving between cities: the planets move, the distances are huge, and the energy cost depends far more on changes of speed than on distance. That idea, delta-v, is at the heart of the Navigator path.
A last scale fact: the asteroid belt, often drawn as a crowded field of rocks, is so sparse that spacecraft cross it without any special manoeuvres. The Kuiper belt beyond Neptune is emptier still.
Pitani
Set the autopilot speed to 1× and press 'Travel at the speed of light'. Watch the light-time clock as you reach Earth: about 8 minutes 20 seconds. Before you look at the table, guess how long the same trip takes to Neptune, then check.
Great. Mavuto ndi pamene kuphunzira amadula.
Chifunso chofulumira
3 mafunso ofulumira. Sankhani yankho kuti muwone ngati muli bwino.
-
If the Sun were a ball 1 metre wide, about how big would Earth be?
- A A football
- B A grapefruit
- C About 9 millimetres, like a pea
- D About 1 millimetre
Onani yankho
C. About 9 millimetres, like a pea The Sun is about 109 times wider than Earth, so 1 m ÷ 109 ≈ 9 mm.
-
At that same scale, how far away would Earth be from the 1-metre Sun?
- A About 1 metre
- B About 10 metres
- C About 107 metres
- D About 1 kilometre
Onani yankho
C. About 107 metres 1 au is about 107.5 Sun diameters, so Earth would be a pea about the length of a football pitch away.
-
Why do most drawings of the solar system show the planets close together?
- A Because they really are close
- B Because at true scale the planets would be too small to see on the page
- C Because the drawings show the planets at their closest approach
- D Because of light pollution
Onani yankho
B. Because at true scale the planets would be too small to see on the page
Kumaliza
- Anasewera ndi interactive
- Onani nkhaniyo
- Kodi chida
- Yatenga chidziwitso
Sankhani mfundo yomaliza kuti muyisungire pa chipangizo chanu.
Kuphunzira kwatha.
Kumanja Days and years on each worldMawu m’chifundochi
Zolemba
- NASA NSSDCA Planetary Fact Sheet (diameters, distances)
- JPL SSD: Approximate Positions of the Planets (semi-major axes)
- NASA NSSDCA: Schoolyard Solar System scale model
Maphunzirowa ali ndi ufulu wogwiritsa ntchito CC BY-SA 4.0.