Tag

Solar Atmosphere

All articles tagged with #solar atmosphere

space-and-spaceflight1 month ago•16 min saved

Sun's Silver Finally Seen: New Solar Atmosphere Model Aligns Sun with Meteorites

A refined model of the Sun's atmosphere shows the Sun contains about 55% more silver than earlier estimates, meaning silver isn't missing but was misread due to simplified models; the solar abundance now aligns better with ancient meteorites and resolves a decades-long discrepancy. The improvement comes from more realistic treatment of the Sun's outer layers and how silver atoms interact with light, rather than discovering new silver. Researchers say the Sun remains a key reference for understanding heavier elements in stars and plan to apply the method to other stars while checking for biases from other elements.

via Gizmodo|

#meteorites #silver #solar-atmosphere

science8 months ago•4 min saved

Unexplained Missing Colors in the Sun

The article discusses mysterious missing colors in the Sun's spectrum, highlighting the complexity of solar spectroscopy, the known and unknown absorption lines, and the ongoing efforts to understand the Sun's atmospheric composition despite existing challenges and incomplete data.

via ScienceAlert|

#fraunhofer-lines #missing-spectral-lines #science

science10 months ago•5 min saved

Scientists Uncover the Mystery Behind 'Rain' on the Sun

Scientists have long struggled to explain the rapid formation of 'solar rain'—cool, dense plasma blobs that fall during solar flares. Recent research shows that allowing elemental abundances, especially low FIP elements like iron, to vary in models explains the quick cooling and condensation observed. This new understanding improves the accuracy of solar models, helping to better interpret solar activity and predict space weather effects.

via Earth.com|

#coronal-rain #plasma #science

science1 year ago•2 min saved

NASA's Parker Solar Probe Delivers Unprecedented Close-Up Images of the Sun

NASA released the closest-ever images of the sun's atmosphere, providing stunning views that could help scientists learn more about the sun's behavior and properties.

via CNN|

#images #nasa #science

science-and-technology2 years ago•2 min saved

NASA's Parker Solar Probe Becomes Fastest Human-Made Object

NASA's Parker Solar Probe has matched its own speed record, reaching nearly 400,000 mph during its 20th close solar approach. The spacecraft, designed to study the sun's outer atmosphere, will eventually reach speeds of 430,000 mph, breaking multiple records and providing valuable data on solar phenomena that can impact Earth.

via Yahoo Life|

#nasa #parker-solar-probe #science-and-technology

spacephysics2 years ago•2 min saved

The Magnetic Power Behind the Solar Atmosphere

Close-up images captured by the Solar Orbiter during its perihelion passage in October 2022 have revealed how small, fleeting magnetic fields on the Sun's surface contribute to the formation of the solar corona. These images show that loops of million-degree gas in the corona are associated with small patches of magnetic fields on the surface. The observations provide valuable insights into the role of small-scale magnetic fields in the development of the Sun's hot atmosphere. Solar Orbiter is set to make another close pass of the Sun in October 2023, allowing for further detailed observations of these processes.

via European Space Agency|

#magnetic-fields #solar-atmosphere #solar-corona

space-science3 years ago•2 min saved

Unraveling the Mystery of the Sun's Scorching Outer Atmosphere

Scientists have discovered that weak but steady waves, known as low amplitude decayless kink oscillations, may explain the extreme heat in the sun's outer atmosphere, or corona. These waves, which do not decay in strength over multiple cycles, vibrate in the same direction and are likely associated with long-duration flows on the solar surface. The findings suggest that energy from the sun's surface can reach the corona and heat it, providing important insights into the long-standing question of what heats the sun's outer atmosphere.

via Space.com|

#coronal-heating #solar-atmosphere #solar-physics