एक्सप्लोरर

1. 1

   अंतराळात आपली जागा

   • Our place in space · 10 मिनिट

     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

   सूर्यापासून नेपच्यून पर्यंत एक पायपीटName

   • A walk from the Sun to Neptune · 10 मिनिट

     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

   प्रत्येक विश्वावर दिवस व वर्षे

   • Days and years on each world · 10 मिनिट

     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

   ऋतू कसे असतात?

   • Why we have seasons · 12 मिनिट

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

5. 5

   चंद्रग्रहणComment

   • Moon phases and eclipses · 12 मिनिट

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

6. 6

   रात्रीचा आकाश व प्रकाश प्रदूषण

   • The night sky and light pollution · 10 मिनिट

     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.

साधन व शिकवणी फक्त शिक्षणासाठी सोपे मॉडेल वापरतात. ते नेविगेशन, मिशन नियोजन किंवा कोणत्याही कार्यकारी निर्णयासाठी वापरले जाऊ नयेत. प्रमाणपत्र मोफत आणि मान्यता नसलेले आहे. शैक्षणिक विषयवस्तु प्रतिबंधक वाचा