Summary:

- The Solar Orbiter spacecraft has discovered mysterious Alfvén waves in the solar wind, which are believed to play a crucial role in accelerating and heating the solar wind.
- These Alfvén waves are transverse waves that propagate along the magnetic field lines in the solar wind, and they are thought to be responsible for the high temperatures and fast speeds of the solar wind.
- The discovery of these Alfvén waves provides important insights into the complex processes that govern the solar wind, which has implications for understanding the Sun's atmosphere and the space weather that affects Earth and other planets.