- dark spots on our Sun’s photosphere (surface) are called sunspots.
- sunspots are 1500’c cooler than the rest of the surface.
- dark centre of the sunspot is the umbra – the coolest part of a sunspot, around the it is the lighter penumbra. (photo)
- sunspots appears in groups that seem to move across the Sun over two weeks, as the Sun rotates. (video)
- small or individual sunspots may last less than one day.
- number of sunspots reaches maximum every eleven years – this is called “Solar Cycle or Sunspots Cycle”. (see the video: Eleven years Solar Cycles)
- next sunspots maximum will be around between 2019 and 2023.
- when sunspots are at their maximum – the Earth’s weather may be warmer and stormier.