កម្មវិធី​រុករក

1. 1

   កន្លែង​របស់​យើង​ក្នុង​ចន្លោះ

   • Our place in space · 10 នាទី

     From your street to the edge of the Milky Way: where Earth sits, how far away things are, and how we measure it.

2. 2

   ដើរ​ពី​ព្រះអាទិត្យ​ទៅ​ភព​នេប៉ាល់

   • A walk from the Sun to Neptune · 10 នាទី

     Almost every picture of the solar system is wrong about scale. Walk it at true scale and feel how empty space really is.

3. 3

   ថ្ងៃ និង​ឆ្នាំ​នៅ​លើ​ពិភពលោក​នីមួយៗ

   • Days and years on each world · 10 នាទី

     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?

4. 4

   ហេតុអ្វី​យើង​មាន​រដូវ

   • Why we have seasons · 12 នាទី

     It is not about distance from the Sun. It is about tilt. See why summer days are long and winter noons are low.

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   ដំណាក់កាល​ព្រះច័ន្ទ និង​ការ​លិច​ព្រះអាទិត្យ

   • Moon phases and eclipses · 12 នាទី

     Why the Moon changes shape through the month, and why we do not get an eclipse every new and full Moon.

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   ផ្ទៃមេឃ​ពេលយប់ និង​ការ​បំពុល​ពន្លឺ

   • The night sky and light pollution · 10 នាទី

     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.

Tools and lessons use simplified models for learning only. They must not be used for navigation, mission planning or any operational decision. Certificates are free and non-accredited. អាន​ការ​លុបចោល​មាតិកា​អប់រំ