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Ulysses's observations of solar wind speed as a function of helio latitude during solar minimum. Slow wind (≈ 400 km/s) is confined to the equatorial regions, while fast wind (≈ 750 km/s) is seen over the poles. [1] Red/blue colors show outward/inward polarities of the heliospheric magnetic field. An illustration of the structure of the Sun
As a result of the interplanetary magnetic field reaching a magnitude of 73 nanotesla (nT), with the component along Earth's magnetic axis oriented south reaching as much as −50 nT, the moderately high solar wind density, and the solar wind speed reaching 750–950 km/s (470–590 mi/s) between 11 and 12 May (UTC time), the event was ...
The heliosphere, the tenuous outermost atmosphere of the Sun, is filled with solar wind plasma and is defined to begin at the distance where the flow of the solar wind becomes superalfvénic—that is, where the flow becomes faster than the speed of Alfvén waves, [87] at approximately 20 solar radii (0.1 AU). Turbulence and dynamic forces in ...
The solar wind is a ubiquitous feature of our solar system. But precisely how the sun generates the solar wind has remained unclear. New observations by the Solar Orbiter spacecraft may provide an ...
Astronomers first reported unusual flares on 2 August, later corroborated by orbiting spacecraft. On 3 August, Pioneer 9 detected a shock wave and sudden increase in solar wind speed [33] from approximately 217–363 mi/s (349–584 km/s). [34] A shockwave passed Pioneer 10, which was 2.2 AU from the Sun at the time. [4]
On April 28, 2021, during its eighth flyby of the Sun, Parker Solar Probe encountered the specific magnetic and particle conditions at 18.8 solar radii that indicated that it penetrated the Alfvén surface; [85] [86] the probe measured the solar wind plasma environment with its FIELDS and SWEAP instruments. [87]
They will continue to orbit their star, their speed slowed due to their increased distance from the Sun and the Sun's reduced gravity. Two billion years later, when the Sun has cooled to the 6,000–8,000 K (5,730–7,730 °C; 10,340–13,940 °F) range, the carbon and oxygen in the Sun's core will freeze, with over 90% of its remaining mass ...
The sun just did something weird, and 3 other space stories you may have missed this week. Sam Matthews. February 11, 2023 at 10:43 AM. Space is very big and quite often, very weird.