Pierre Grigoletto @PierreGrigolet2

"Kepler spacecraft takes pulse of distant stars: 'Starquakes' yield new insights about the size, age and evolution of stars" 11/11 👉 sciencedaily.com/releases/2010/…

... we can glean information about the interior structure, composition, and physical properties of stars. This, in turn, contributes to our understanding of fundamental astrophysical processes, such as nuclear fusion and magnetic field dynamics. 10/10 Video © NASA

... impacting the formation of planetary systems and contributing to the dispersal of heavy elements into space. Starquakes serve as natural laboratories for exploring the extreme conditions present within stars. By studying the seismic waves generated during these events,... 9/

The occurrence of these celestial tremors is often linked to the later stages of a star's evolution, particularly for compact objects like neutron stars and white dwarfs. The energy released during a starquake can influence the surrounding stellar environment, ...8/

... beams of electromagnetic radiation. Changes in the pulsar's rotation rate, known as glitches, are indicative of the occurrence of a starquake. Studying starquakes provides crucial insights into the life cycle of stars and their eventual fate. 7/

... current observational technology. However, advances in space-based telescopes and sensitive instruments have enabled astronomers to identify certain types of starquakes. Pulsars, for example, are highly magnetized, rotating neutron stars that emit ... 6/

The sudden restructuring of the magnetic field can result in a cataclysmic release of energy, causing the star's surface to convulse and quake. Detecting starquakes poses a unique challenge for astronomers due to the vast distances involved and the limitations of ... 5/

This stress can arise from various factors, including the star's rotation, magnetic activity, and internal pressure imbalances. In many cases, the release of energy during a starquake is associated with the star's magnetic fields interacting with its outer layers. 4/

... and driven by internal processes such as nuclear fusion. When the intense gravitational forces within a star become unstable, they can give rise to a starquake. The primary trigger for a starquake is the accumulation of stress within the star's interior. 3/

A starquake is a seismic disturbance that occurs on the surface of a star, analogous to earthquakes on Earth. However, the scale and nature of these celestial events are on an entirely different magnitude. Stars are immense spheres of plasma held together by gravity ... 2/

Celestial bodies are constantly undergoing dynamic processes that shape the very fabric of the universe. Among these phenomena, one of the most intriguing events is the starquake, a cosmic tremor that occurs on the surface of stars, unveiling a realm of astrophysical wonders. 1/

... that resemble spider legs or branching channels. Over time, wind erosion can accentuate these formations, making them more pronounced. 5/5

As the gas escapes, it can create pressure that fractures the surface material, allowing the gas to escape through fissures. The escaping gas carries dust & sand with it, depositing these materials on the surface in branching patterns ... 4/

Araneiform terrain forms during the springtime in the Martian southern hemisphere when carbon dioxide ice (dry ice) trapped beneath the surface sublimates, turning directly from solid to gas. 3/

But, what are the 'spider' formations? The "spiders" on Mars refer to a unique geological feature observed in the Martian southern polar region. These formations are formally known as "araneiform terrain" due to their resemblance to spiders or spider webs. 2/

Singh's long-exposure images showcase the celestial dance above the lake, highlighting our connection to the cosmos. 2/2

Astrophotographer, Amrinderjit Singh captured stunning star trails above Pangong Lake in the Himalayas. These colorful streaks depict Earth's rotation & orbit around the Sun. The lake's remote location offers pristine dark skies, ideal for such photography. 1/

@ModelYManiac The origin of star bars in galaxies is still debated. They may form due to density waves, secular evolution, or galactic interactions. While SBhs at galactic centers may influence their dynamics, their direct role in bar formation is unclear.

... observations back to 11.5 billion years ago, doubling the number of observed bars in galaxies. Further research aims to explore even earlier cosmic times, potentially shedding light on bar growth just 1.6 billion years after the Big Bang. 3/3

The telescope detected structures called "star bars" in galaxies just a few billion years after the Big Bang, indicating a more settled phase of evolution. Compared to the Hubble telescope, JWST's increased sensitivity and wavelength range extended ... 2/