On April 28, 2021, NASA’s Parker Solar Probe entered this region about 13 million km (8 million miles) above the solar photosphere. Parker Solar Probe launched in 2018 to explore the mysteries of the Sun by traveling closer to it than any spacecraft before. That point, known as the Alfvén critical surface, marks the end of the solar atmosphere and beginning of the solar wind. “Parker Solar Probe ‘touching the Sun’ is a monumental moment for solar science and a truly remarkable feat,” said Dr. Thomas Zurbuchen, the associate administrator for the Science Mission Directorate at NASA Headquarters. Parker Solar Probe Enters the Magnetically Dominated Solar Corona.

Source: Ethiopian News December 15, 2021 21:03 UTC