Completely drunk, I can't see the sky in the water. A ship full of dreams sank into the Milky Way.

At high altitudes near the North and South poles of the earth, a strange light often appears at night. It is colorful: purple, rose, orange, white and blue. This is the aurora, so how is the aurora formed?

Light is generated by molecules or atoms in the upper atmosphere excited by high-energy charged particles from the earth's magnetosphere or the sun. It often appears in the sky near the earth's magnetic pole in latitude, and is generally strip-shaped, arc-shaped, curtain-shaped and radial. These shapes are sometimes stable and sometimes constantly changing.

Aurora has three conditions: atmosphere, magnetic field and high-energy charged particles, all of which are indispensable. Aurora not only appears on the earth, but also on other planets with magnetic fields in the solar system.

Looking at the gift of nature, I can't help thinking of this poem.

Qingcaohu Lake in Tilongyang County

[Yuan Tang Wenru]

The autumn wind has blown, and Dongting Lake seems to be aging a lot. After a night of melancholy, Xiang Jun should have more white hair.

Completely drunk, I can't see the sky in the water. A ship full of dreams sank into the Milky Way.

Beautiful scenery, beautiful poems, for you!