Explorer
Vores plads i rummet, den sande skala af solsystemet, dage og år, årstider, faser og formørkelser, og nattehimlen.
NASA
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Vores plads i rummet
- Our place in space · 10 min Afsluttet
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 Afsluttet
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En tur fra Solen til Neptun
- A walk from the Sun to Neptune · 10 min Afsluttet
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 Afsluttet
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Dage og år på hver verden
- Days and years on each world · 10 min Afsluttet
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 Afsluttet
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Hvorfor vi har årstider
- Why we have seasons · 12 min Afsluttet
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 Afsluttet
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Månefaser og formørkelser
- Moon phases and eclipses · 12 min Afsluttet
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 Afsluttet
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Nattehimlen og lysforurening
- The night sky and light pollution · 10 min Afsluttet
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 Afsluttet
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