New calculations suggest that recycling of material through small moons can lengthen the lifetime of rings and moons. This process, known as cosmic recycling, allows for the re-accretion of fragments into new moons, extending the persistence of ring systems.
The cloud's mass indicates that Europa faces more severe radiation consequences than previously thought, wielding significant influence on Jupiter's magnetosphere. The discovery uses innovative ENA imaging technique to visualize the three-dimensional structure of planetary space environments.
Individuals with reduced functional Artemis protein are prone to mild immunodeficiency and increased risk of developing lymphomas. This finding suggests that mutations in Artemis or other DNA repair genes may be responsible for immune deficiency and/or lymphoma cases.
New theory explains why circumstellar Keplerian disks are stable around Be stars, contradicting previous model's predictions. The Magnetically Torqued Disk model suggests a narrow range of star types can form detectable disks.
A new kind of cruise missile engine, called a scramjet, has been tested to achieve Mach 6.5 speeds in simulated hypersonic conditions, outperforming traditional ramjets. The engine is being developed for use in the HyFly joint DARPA/ONR Flight Demo program, aiming to launch missiles at speeds up to Mach 6 and ranges of 600 nautical miles.
Researchers are using computer simulations to determine if the 47 Ursae Majoris system can contain an Earth-like planet. The system's asteroid belt is in the habitable zone, increasing the likelihood of finding a terrestrial planet.
The Cassini spacecraft's Magnetospheric Imaging Instrument (MIMI) has captured the first images of Jupiter's magnetosphere and surrounding particles. These images reveal the presence of a huge nebula enveloping Jupiter, extending out to 13 million miles from the planet.
A search for lightning on Venus in 1998 and 1999 using the Cassini spacecraft failed to detect high-frequency radio waves commonly associated with lightning. Donald Gurnett, a space physicist at the University of Iowa, suggests that if lightning exists on Venus, it may be extremely rare or very different from terrestrial lightning.
The University of Colorado-built UVIS instrument package has produced the first spectral images of Jupiter, capturing its aurora and a gigantic glowing ring of gas encircling the planet. The image reveals temperatures of over 100,000 degrees Fahrenheit and a torus density so low that it would fit inside Fenway Park if compressed to sol...
Researchers at Case Western Reserve University have developed a technique to simulate various gravitational environments using a magnetic levitation method. This allows them to study the behavior of liquids and solids in conditions ranging from Earth's gravity to zero-G environments, providing new insights into fluid dynamics.
The Marshall Space Flight Center is developing innovative solutions to reduce costs and increase reliability in space transportation. The team aims to make space accessible to the general public, enabling adventure travel, business ventures, and scientific research.
NYU chemist Robert Shapiro challenges existing assumptions about life's universality with a new theory that simple cellular life may arise from organic chemistry and self-organizing systems. He also advocates for continued search for extraterrestrial life in nearby worlds like Mars, Europa, and Titan.
Scientists discover Jupiter's ring system is composed of dust kicked up by meteoroids striking four inner moons, with the outermost ring consisting of two embedded rings. The system provides a unique dynamical laboratory for studying the solar system's early processes.
Dahl's award-winning ion optics simulation program, SIMION, has been instrumental in designing instruments for the Cassini mission to Saturn. On Earth, SIMION is used to analyze environmental contaminants, decode DNA, and uncover illegal drugs in urinalysis samples.
Astronomers have discovered eta Carinae, a bright stellar object in the Milky Way, to be the most massive binary star system ever known. The two stars, each weighing about 70 times that of the sun, orbit each other every 5.5 years, causing predictable spectral changes.
Researchers use numerical simulations to show connection between Earth's changing shape and gravitational effects of other bodies in the Solar System. The study reveals that changes in the Earth's axial tilt can produce large changes in climate.
Scientists have discovered oxygen locked in ice on Callisto, a moon of Jupiter, with sunlight playing a key role in separating hydrogen and oxygen atoms. Meanwhile, the Galileo team has found that sulfur dioxide emissions from Io are caused by both volcanic activity and frost sublimation.
The CU instrument package will study Saturn's spectacular ring system, moons and atmospheric gases. It will analyze the atmosphere of Titan, a moon with conditions similar to early Earth.
Microbial subsurface life is likely to be found on Mars and other planetary bodies in our solar system. The theory proposes that life evolved from the inside out, using rocks for oxygen, and suggests that petroleum has come up from great depths, not from biological sediments.
Scientists detect unique X-ray vibrations in black hole candidate GRS 1915+105, potentially revealing its mass and rotation rate. The discovery is consistent with predictions made by the Stanford astrophysics group three years ago.