The Parker Solar Probe
Azimuth,
Dec 26, 2024
Nothing to do with online learning, but it's cool, so it's going into the newsletter. The surface of the Sun is known as the Alfvén surface. "Above this surface, the solar wind becomes supersonic, so no disturbances in its flow can affect the Sun below." The Parker Solar Probe aoared below the Alfvén at a speed of 690,000 kilometers per hour (in other words, from Montreal to Vancouver is a bit less than a second). We've never been thi fast or this close to the Sun before.
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