- BBC Science/Nature
- 20/6/21 13:12
Skywatchers photographed the "ring of fire", where the moon passes between the Earth and the Sun.
Skywatchers photographed the "ring of fire", where the moon passes between the Earth and the Sun.
What are second waves and how big a problem are they?
This leaves four-fifths - twice the area of Mars - still to be surveyed to a modern standard.