Explorador
El nostre lloc en l'espai, la veritable escala del sistema solar, dies i anys, estacions, fases i eclipsis, i el cel nocturn.
NASA
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El nostre lloc a l'espai
- Our place in space · 10 min Completat
From your street to the edge of the Milky Way: where Earth sits, how far away things are, and how we measure it.
- Our place in space · 10 min Completat
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Un passeig del Sol a Neptú
- A walk from the Sun to Neptune · 10 min Completat
Almost every picture of the solar system is wrong about scale. Walk it at true scale and feel how empty space really is.
- A walk from the Sun to Neptune · 10 min Completat
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Dies i anys en cada món
- Days and years on each world · 10 min Completat
Venus takes longer to spin once than to go around the Sun, Jupiter spins in under ten hours, and Neptune's year is 165 of ours. Why?
- Days and years on each world · 10 min Completat
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Per què tenim estacions
- Why we have seasons · 12 min Completat
It is not about distance from the Sun. It is about tilt. See why summer days are long and winter noons are low.
- Why we have seasons · 12 min Completat
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Fases i eclipsis de la Lluna
- Moon phases and eclipses · 12 min Completat
Why the Moon changes shape through the month, and why we do not get an eclipse every new and full Moon.
- Moon phases and eclipses · 12 min Completat
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El cel nocturn i la contaminació lumínica
- The night sky and light pollution · 10 min Completat
Most people alive today have never seen a truly dark sky. See how many stars light pollution hides, and what anyone can do about it.
- The night sky and light pollution · 10 min Completat
Les eines i lliçons usen models simplificats només per a l' aprenentatge. No s' han d' usar per a la navegació, planificació de missions o qualsevol decisió operativa. Els certificats són lliures i no acreditats. Llegiu la desresponsabilització del contingut educatiu