coronal hole

Is the idea of using the Sun as a signal amplifier in 'The Three-Body Problem' really feasible?
In the book
The giant dark area is detected again on the surface of the Sun.
NASA has just discovered a huge dark area on the Sun's atmosphere. Images recorded by NASA's Solar Observatory on November 8 and November 20.
Is the giant hole in the Sun really scary?
A clear picture of a black hole in the Sun can make many people fear for the future of our solar system.
The solar wind will light up the Earth tonight with an aurora
According to Rutledge, people in Asia, Europe and North America will be able to see this special event if they leave the towns with too much artificial light.
The best pictures of the universe in 2015
Unique moments of the fanciful universe under the lens of amateur photographers or Hubble space telescope.