On December 11, the Parker Probe made its 14th close flight to the Sun as part of its mission to decode the star’s mystery..
Currently closest approach to the Sun (perihelion) On December 11 at 8:16 p.m. Hanoi time, Parker flew through the photosphere about 8.5 million kilometers from the star’s surface.Incredible speed 586.829 km/hmore than 200 times faster than a bullet fired from a rifle and faster than any previous spacecraft.
Simulation of the Parker probe flying over the Sun.
Simulation of the Parker probe flying over the Sun. (Photo: NASA).
However, this is still not the limit for NASA probes. It is expected that in 2025, Parker will approach the closest Sun, at a distance of 6.2 million kilometers from the surface, and fly at a speed of up to 690,000 km/h, fast enough to get from Philadelphia to Washington, DC in a quick flight. second.
At perihelion, Parker encountered intense radiation and terrible heat of up to 1,400 degrees Celsius. To overcome these harsh conditions, the spacecraft is equipped with a 4.5-inch-thick carbon composite shield, which helps maintain its scientific payloads at room temperature.
One of the main objectives of the Parker probe is study the crown, the outermost layer of the Sun’s atmosphere. The data collected could help solve one of the star’s biggest mysteries: why is its atmosphere hotter than the surface?
Physical theories suggest that the deeper one penetrates into a star’s plasma, the more the pressure increases and the star becomes hotter. However, the coronavirus challenges this understanding. Although thin and diffuse, the plasma in the corona is hotter than the plasma in the underlying photosphere. The temperature at the corona reaches 1.1 million degrees Celsius, while 1,600 km below, the photosphere is 10 million times denser but reaches a temperature of only 5,500 degrees Celsius.
It is difficult to study the corona from Earth because the light it emits is overwhelmed by the much stronger light from the photosphere, meaning the corona is only visible during a total solar eclipse, when the Sun and Moon block the light of the photosphere.
The Parker probe must therefore get as close as possible to the star to better understand the corona, the layer responsible for the emission of the solar wind, a flow of charged particles which can hinder the energy base and lower the communication layer on Earth . .
Parker will make the 15th approach to the Sun on March 17, 2023, also reaching a distance of 8.5 million kilometers above the Sun’s surface. Later this year, the spacecraft will fly past Venus to adjust its orbit closer to the Sun as the mission ends in 2025.
Article source: VnExpress
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On December 11, the Parker probe will fly near the Sun for the 14th time as part of its mission to decode the mystery of the star. At a time…