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Physics · Astronomy

Sun, Earth & Moon

Tilt Earth to make the seasons, drag the Moon through its phases, line up real eclipses and read the time from a shadow.

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First lesson01 · A spinning EarthSee all 16 lessons →

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The course

4 worlds · 16 lessons

World 1 · Day, Night & Shadows

FREEA spinning Earth and a moving Sun
  1. 01A spinning EarthWhy the Sun rises and sets · 6 min
  2. 02How long is a day?Daylight depends on where you stand · 7 min
  3. 03Sun height and shadow lengthLow Sun, long shadow · 6 min
  4. 04The Sun's path and the shadow clockShadows that tell the time · 7 min

World 2 · Seasons

PROA tilted planet on a year-long trip
  1. 01The tilted axisLeaning toward the Sun, then away · 7 minPRO
  2. 02It is not the distanceClosest to the Sun in January · 6 minPRO
  3. 03What if Earth had no tilt?Experiments you cannot do with a real planet · 6 minPRO
  4. 04Tropics, polar circles and the midnight SunLines drawn by the tilt · 7 minPRO

World 3 · Moon Phases & Tides

PROA sunlit ball seen from different angles
  1. 01Always half litWhat phases really are · 7 minPRO
  2. 02Waxing and waningA 29.5-day cycle · 6 minPRO
  3. 03When does the Moon rise?The phase tells the time · 6 minPRO
  4. 04Upside-down Moons and tidesTwo more things the Moon does · 7 minPRO

World 4 · Eclipses

PROWhen the shadows line up
  1. 01Lining upSolar and lunar eclipses · 7 minPRO
  2. 02Why not every month?The tilted orbit and its nodes · 8 minPRO
  3. 03Total or annular?The ring of fire · 6 minPRO
  4. 04The red MoonPenumbral, partial, total · 6 minPRO
Read first

Guides for Sun, Earth & Moon

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Parents
Sun, Earth & MoonKids Zone Safety Guide for Parents: What to KnowA plain-language guide to how the Novareka kids zone protects children aged 6–10: no ads, no accounts, no tracking, parent-only controls and easy deletion.4 min read
Parents
Sun, Earth & MoonScience at Home With the Family Plan: A Weekly RoutineHow a family can use the Family plan: kid profiles, a weekly rhythm, safe kitchen-table follow-ups and good questions to ask, from a short weekly parent e-mail.3 min read
Parents
Sun, Earth & MoonScreen Time That Teaches: A Parent Guide for Ages 6–10How to tell active, curious screen time from passive scrolling, how to choose good activities, keep sessions short and talk about them afterwards.3 min read