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  1. Why is it hotter in summer and colder in winter?

  2. Weblink: Los Angeles at Night

  3. Liquid Helium

  4. Video: 3D planetary system - augmented reality

  5. Cosmic Velocities

  6. Doppler Effect

  7. Determination of Asteroids rotation periods

  8. Hubble and de Vaucouleurs schemas for galaxies.

  9. The encyclopeda of extrasolar planets

  10. Globular Clusters