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Mass Loss

All articles tagged with #mass loss

Earth's fate in the Sun's death: a tug-of-war between tides and mass loss
science13 days ago

Earth's fate in the Sun's death: a tug-of-war between tides and mass loss

New stellar-evolution models suggest Earth could survive the Sun's expansion into a red giant, depending on whether tidal forces pulling Earth inward or mass loss from the Sun's outer layers dominates. If tides prevail, Earth is engulfed; if mass loss dominates, Earth escapes to a wider orbit. Observations of the nearby dying star L2 Puppis support potential survival for Earth, while Mercury and Venus are likely doomed. Future observations, including ESA's PLATO mission, may provide a clearer answer.

via Yahoo|
#earth#mass-loss#red-giant
Moons of Uranus hinder its ring formation
science-and-astronomy2 years ago

Moons of Uranus hinder its ring formation

New simulations suggest that the size of Uranus' rings is controlled by its five major moons, which can eject significant amounts of dust out of the Uranian system. The interactions between the moons and the rings, particularly when they are in "mean motion resonances," can truncate the size of Uranus' ring system. The moons Miranda and Ariel have the greatest influence, severely truncating the rings at a distance of 4.3 planetary radii. The research also suggests that the rings may have been larger and brighter in the past but have been diminished by the moons' scouring effect.

via Space.com|
#mass-loss#moons#rings
"Supernova Discovery Shakes Up Stellar Evolution Theory with Extreme Weight Loss"
astronomy2 years ago

"Supernova Discovery Shakes Up Stellar Evolution Theory with Extreme Weight Loss"

The discovery of a nearby supernova, SN 2023ixf, challenges the standard theory of stellar evolution as it exhibited extreme mass loss in the year leading up to its explosion, shedding a mass equivalent to that of the Sun. This unexpected behavior provides insight into the final stages of a star's life and suggests potential instability. The delayed shock breakout observed in SN 2023ixf indicates the presence of dense material from recent mass loss, contradicting previous expectations. Further observations and collaboration between amateur and professional astronomers are crucial in understanding the evolution of massive stars and their supernova explosions.

via SciTechDaily|
#astronomy#mass-loss#observations
"Stellar Transformation: Celestial Body's Astonishing Weight Loss Precedes Spectacular Supernova"
astronomy2 years ago

"Stellar Transformation: Celestial Body's Astonishing Weight Loss Precedes Spectacular Supernova"

A newly discovered Type II supernova, SN 2023ixf, challenges the standard theory of stellar evolution as it exhibited unexpected behavior prior to its explosion. Observations revealed that the shock breakout of the supernova was delayed by several days, indicating extreme mass loss close to the mass of the sun in the final year before the explosion. This sheds light on the instability and potential nuclear burn-off of high-mass elements in the star's core. The discovery provides valuable insights into the evolution of massive stars and their supernova explosions.

via Phys.org|
#astronomy#mass-loss#observations
Saturn's Rings Losing Mass at Alarming Rate.
astronomy3 years ago

Saturn's Rings Losing Mass at Alarming Rate.

Saturn's iconic rings are losing tons of mass every second and are relatively young, just a few hundred million years old, according to new analysis of data from NASA's Cassini mission. The rings likely formed after the planet itself and will disappear in 100 million years. The research also suggests that the rings are suffering repeated impacts from meteoroids, which erode their dusty essence.

via ExplorersWeb|
#age#astronomy#cassini