An astrophysics researcher has identified the possible compositions of the seven planets in the TRAPPIST-1 system. Using thousands of numerical simulations to identify the planets stable for millions of years, Quarles concluded that six of the seven planets are consistent with an Earth-like composition. The exception is TRAPPIST-1f, which has a mass of 25 percent water, suggesting that TRAPPIST-1e may be the best candidate for future habitability studies.
A new study suggests that roughly 22% of the element xenon found in Earth's atmosphere may have come from comets.
With high-pressure experiments at DESY's X-ray light source PETRA III and other facilities, a research team has solved a long standing riddle in the analysis of meteorites from Moon and Mars. The study can explain why different versions of silica can coexist in meteorites, although they normally require vastly different conditions to form. The results also mean that previous assessments of conditions at which meteorites have been formed have to be carefully re-considered.
The cancer risk for a human mission to Mars has effectively doubled following a study predicting a dramatic increase in the disease for astronauts traveling to the red planet or on long-term missions outside the protection of Earth's magnetic field. The new predictive model shows radiation from cosmic rays extends from damaged to otherwise healthy 'bystander' cells.
Scientists are considering the unusual and challenging problem of how to perform emergency medical procedures during space missions.
A companion star crashing into a red giant star may explain the chilling power to the Boomerang Nebula.
A new Hubble image shows a distant galaxy as it begins to align with and pass behind a star sitting nearer to us within the Milky Way.
A new citizen-science tool released earlier this year to help astronomers pinpoint new worlds lurking in the outer reaches of our solar system has already led to a discovery: a brown dwarf a little more than 100 light years away from the Sun. Just six days after the launch of the Backyard Worlds: Planet 9 website, four users alerted the science team to the curious object, whose presence has since been confirmed via telescope.
A long-lasting lake on ancient Mars provided stable environmental conditions that differed significantly from one part of the lake to another, according to a comprehensive look at findings from the first three-and-a-half years of NASA's Curiosity rover mission.
A recent statistical study has revealed that exoplanets with a mass of between 1 and 100 times the mass of Earth have a surface gravity surprisingly similar to terrestrial gravity.
Enceladus -- a large icy, oceanic moon of Saturn -- may have flipped, the possible victim of an out-of-this-world wallop. While combing through data collected by NASA's Cassini mission during flybys of Enceladus, astronomers have found the first evidence that the moon's axis has reoriented, according to new research published in Icarus.
Scientists using data from NASA's Lunar Reconnaissance Orbiter have identified bright areas in craters near the moon's south pole that are cold enough to have frost present on the surface.
Coinciding with May -- Healthy Vision Month, NASA's One-Year Mission investigators are peering into their new findings to help address astronaut vision issues.
Images from LRO show a brief violent movement of one of the Narrow Angle Cameras on NASA's Lunar Orbiter in October of 2014.
A new way to improve how we measure the age of planetary evolution in our solar system has been identified by a team of researchers.
Researchers have announced that six boxes of fruit flies (Drosophila melanogaster) will travel to the International Space Station (ISS) to study the impact of weightlessness on the heart. The fruit flies are scheduled to launch on June 1, 2017, from NASA’s Kennedy Space Center and will travel to the ISS via a SpaceX Dragon spacecraft.
NASA's Juno mission is rewriting what scientists thought they knew about Jupiter specifically, and gas giants in general, according to a pair of Science papers released today. The Juno spacecraft has been in orbit around Jupiter since July 2016, passing within 3,000 miles of the equatorial cloudtops.
Online volunteers have helped astronomers find a star that exploded 970 million years ago, predating the dinosaurs' time on Earth.
When astronomers took a new look at a famous galaxy with the upgraded Very Large Array, they were surprised by the appearance of a new, bright object that had not appeared in previous images.
In the icy bodies around our solar system, radiation emitted from rocky cores could break up water molecules and support hydrogen-eating microbes. To address this cosmic possibility, a team modeled a natural water-cracking process called radiolysis. They then applied the model to several worlds with known or suspected interior oceans, including Saturn's moon Enceladus, Jupiter's moon Europa, Pluto and its moon Charon, as well as the dwarf planet Ceres.