知识世界

Astronomy:The Cosmos July to September

The mid-latitudes of the northern hemisphere. From July to September， our viewpoint for the nightsky. It's mid-evening and we are looking north. Night so short and warm， and noon the sun is high overhead. The Plough or Big Dipper is easily spotted in the summer skies. The pattern forms part of the Ursa Major， the constellation of the Great Bear， with its longer tail.

• 01

  Astronomy： Threat from Space

  
• 02

  Astronomy： Galileo and the Milky Way

  
• 03

  Astronomy： Spacefiles — Lord of the Rings

  
• 04

  Astronomy： Spacefiles — Venus

  
• 05

  Astronomy： Spacefiles — Sun

  
• 06

  Astronomy： The Story of Aviation

  
• 07

  Astronomy： Spacefiles — Galaxy

  
• 08

  Astronomy： History of the Race to the Moon

  
• 09

  Astronomy： Deep Impact

  
• 10

  Astronomy： Edwin Powell Hubble and the Expanding Universe