NASA has selected the Comet Astrobiology Exploration Sample Return and Dragonfly mission for concept development under the New Frontiers program. The CAESAR mission aims to return a sample from a comet to study its origin and history, while the Dragonfly mission will explore Saturn's moon Titan and its prebiotic chemistry.
A NASA-led team has identified that gravity waves are the primary driver of Jupiter's equatorial jet stream's reversal, with convection in the lower atmosphere producing waves that travel up to the stratosphere. The findings could help scientists better understand the dynamic atmosphere of Jupiter and other planets.
A study led by University of Leicester scientist Dr. Leigh Fletcher found that massive northern storms on Saturn can disrupt its equatorial atmospheric patterns, similar to those seen on Earth. The research reveals a link between distant events in a planet's climate system, known as teleconnection.
Cassini spacecraft data reveals Saturn's rings casting shadows in ionized particles, affecting the planet's ionosphere. The dynamic ionosphere is structured on small scales and shows surprising variability, with possible explanations including ring rain, solar radiation, or magnetic field interactions.
Scientists discovered a rare form of nitrogen gas in Earth's atmosphere, which is more abundant than expected. The discovery provides clues about the composition of life-supporting planets and their atmospheres.
Researchers discovered a significant cooling of Titan's polar atmosphere, contradicting model predictions and other celestial bodies. The study attributes this phenomenon to exotic photochemical reactions producing hydrocarbons that cool the atmosphere.
A new physical model proposes that most of Earth's water came from objects scattered into the inner Solar System by Jupiter's rapid growth. The model suggests that Jupiter's massive size and gravitational pull disturbed thousands of water-rich planetesimals, delivering them to the region currently occupied by Earth's orbit.
Scientists are planning to build an ambitious submillimeter-wave instrument to study the composition of geysers on Saturn's moon Enceladus. The instrument, SELFI, will measure traces of chemicals in the plumes, potentially revealing clues about the presence of extraterrestrial life and the ocean's chemistry.
Research using ESA's XMM-Newton and NASA's Chandra X-ray observatories found that Jupiter's south pole X-ray emissions pulse every 11 minutes, while north pole emissions are erratic. This behavior is distinct from Earth's auroras, which mirror each other in activity.
Researchers at Imperial College London have discovered a novel water droplet behavior that allows some droplets to form 'crowns' around particles, enabling efficient liquid deposition and coating. This breakthrough has implications for industrial spray drying methods used in detergent and instant coffee production.
Astronomers conclude that Saturn's seven moons - Pan, Atlas, Prometheus, Pandora, Epimetheus, Mimas, and Janus - work together to contain the A ring. The moon's gravitational influence slows down the spreading ring's momentum, creating an edge.
Researchers found that extreme methane rainstorms occur frequently on Titan, creating massive floods in deserts and shaping the moon's surface. The storms are correlated with the formation of alluvial fans, similar to those on Earth.
A team led by UCLA professor David Jewitt has identified a primitive comet, C/2017 K2 (PANSTARRS), 1.5 billion miles from the sun. The discovery allows scientists to monitor the comet's activity over an extraordinary range of distances.
Researchers use digital holographic microscopy to detect microorganisms and evidence of life in Enceladus water plumes. A universal biosignature is also proposed to detect biological systems on ocean worlds like Enceladus.
CU Boulder scientists, led by Professor Larry Esposito, will continue to study Saturn's rings, moons and atmosphere using the Ultraviolet Imaging Spectrograph (UVIS) instrument on the Cassini-Huygens mission. The team has made numerous discoveries, including the detection of oxygen atoms in Saturn's system and water plumes from Enceladus.
A team of scientists identified 68 exoplanets where observers can see the planets in our Solar System transit the Sun. Nine of these are ideally placed to observe Earth's transits, although none are habitable.
The James Webb Space Telescope will study the 'ocean worlds' of Europa and Enceladus, adding to previous observations by Galileo and Cassini orbiters. The telescope's high-resolution imagery and spectroscopic analysis will help unravel the mysteries of these moons' subsurface oceans and potential biosignatures.
Saint Louis University chemist Paul Bracher has received a $597,380 NSF grant to investigate the origins of life on Earth and potentially in oily environments like Titan. The research aims to develop new biochemistry that can function in organic solvents.
Scientists have tracked a solar storm using data from 10 NASA and ESA spacecraft, shedding light on how coronal mass ejections (CMEs) move through space. The study provides key information for understanding space weather effects on the solar system.
NASA scientists have definitively detected acrylonitrile, a chemical thought to form stable structures similar to cell membranes, in Titan's atmosphere. This finding suggests the possibility of membrane-like structures forming on Titan, which could be an important step towards life discovery.
Scientists confirm the presence of vinyl cyanide on Saturn's moon Titan, suggesting chemical processes analogous to those important for life on Earth. The findings provide insights into Titan's unique environment and potential prebiotic chemistry.
A technique called digital holographic microscopy, which uses lasers to record 3-D images, may be used to spot extraterrestrial microbes on Enceladus. The method could help identify living cells by analyzing motion and chemical composition.
New research on Titan's lakes reveals that most waves reach only about 1 centimeter high, making it a serene environment suitable for safe landing of future probes. The study suggests that the winds are likely low, with patches of smooth and rough surfaces detected.
Scientists detect methanol around Saturn's moon Enceladus using a ground-based telescope, suggesting complex chemical reactions occur in the plume once it's ejected into space. This finding highlights the need for further direct observations by future spacecraft to understand the chemistry of subsurface oceans.
The James Webb Space Telescope will observe a range of celestial objects, from the outer planets and Kuiper Belt to exoplanets and distant galaxies. The initial 2100 observations planned will address various science areas, including first light, galaxy assembly, and star and planet birth.
Astronomers from Cornell University and NASA have found evidence that Enceladus' axis has reoriented by about 55 degrees, suggesting an asteroid impact may have triggered the change. The moon's south pole is geologically young and active, while the north pole appears older and covered in craters.
The Juno mission has revealed cyclones on Jupiter's poles with diameters up to 1,400 kilometers across. The spacecraft also detected a massive magnetic field that is substantially stronger than models predicted, potentially powering the planet's huge aurorae.
Researchers have found that radioactive decay in rocky cores of icy bodies can produce molecular hydrogen, a key ingredient for life. This process, known as radiolysis, has the potential to support microbial communities on planets like Enceladus and Europa.
New evidence suggests different origins of topography on Earth, Mars and Titan. Researchers found plate tectonics to be a key factor shaping Earth's surface but not as influential on Mars and Titan.
Researchers discovered that Titan's river networks, like Mars', formed topography without plate tectonics. This finding suggests a distinct geological history for the moons of Saturn and challenges our understanding of Earth's unique surface.
Researchers found that Titan's topography may grow through tidal changes in its icy crust, unlike Earth and Mars which underwent active plate tectonics. The study also sheds light on Martian topography, suggesting major features formed early in the planet's history.
Astronomers have discovered a new gas giant, KELT-11b, with an incredibly low density similar to styrofoam, offering opportunities to test atmospheres and assess habitability. The planet's large atmosphere will aid in developing techniques to identify chemicals and products of life.
Scientists at Northumbria University and University of Plymouth are developing medical guidelines for astronauts. A systematic review group will pool studies and create comprehensive guidelines that inform operational decisions. The guidelines aim to prevent health changes among astronauts, as well as benefiting terrestrial human health.
Cassini-Huygens mission has fostered dazzling discoveries, including in-depth studies of Saturn's rings, methane lakes on Titan, and hot water plumes from Enceladus. The spacecraft will enter Saturn's atmosphere and vaporize after final ring-dive on September 15.
New data from NASA's Cassini mission, combined with measurements from Voyager spacecraft and IBEX, suggests that the sun's magnetic field creates a rounded heliosphere, rather than a comet-shaped structure. The study reveals that the heliosphere is nearly symmetrical, which could impact how cosmic rays reach the inner solar system.
Researchers analyze amino acid stability under various extraterrestrial conditions, including temperature, pH, and radiation, to identify potential building blocks of alien life. The study aims to find structural characteristics that lead to higher stability in these conditions.
Scientists from Southwest Research Institute have discovered hydrogen gas in the plume of material erupting from Saturn's moon Enceladus, indicating ongoing hydrothermal activity. This finding suggests that Enceladus' ocean floor could support life similar to that found near hydrothermal vents on Earth.
The Cassini spacecraft detected molecular hydrogen in the plume of Saturn's moon Enceladus, suggesting hydrothermal reactions between hot rocks and water. This finding indicates that Enceladus' sub-surface ocean may support life, making it a promising candidate for astrobiological research.
Researchers at Georgia Institute of Technology found that Titan's non-silicate granules become electrically charged when kicked up by wind, causing them to cling together and resist further motion. This property helps explain the formation of large sandy dunes on Titan's surface, which are unlike anything seen on Earth.
Researchers propose that debris from an asteroid impact could have formed Mars' rings, which would then break apart and re-form into moons. The model suggests that this cycle may repeat, potentially explaining sedimentary deposits found on Mars.
A study suggests that long ago, Earth's atmosphere spent about a million years filled with a methane-rich haze, clearing the way for massive amounts of oxygen. The transformation resulted in an atmosphere much like the one that sustains life on Earth today.
Researchers measured Saturn's ring brightness and temperatures using Subaru Telescope images. The Cassini Division and C ring appeared brighter in mid-infrared due to thermal emission from warmer particles. However, seasonal changes in the ring opening angle caused variations in their apparent brightness.
Researchers suggest an unseen population of gas giant planets may exist at distances similar to Jupiter and Saturn, resolving a long-standing debate about their formation. The predicted planets could be found using NASA's Wide Field Infrared Survey Telescope.
Researchers estimated the solar nebula's lifetime using ancient meteorites, finding it lasted around 3 to 4 million years. This discovery suggests gas giants Jupiter and Saturn formed within the first 4 million years of the solar system's formation.
A UCLA-led team of scientists has discovered a white dwarf star with an atmosphere rich in carbon, nitrogen, oxygen, and hydrogen, the components of water. The study suggests that the planetary system associated with the white dwarf contains materials necessary for life.
The team estimated the solar nebula's lifetime using ancient meteorites that formed 4.653 billion years ago, suggesting it disappeared within the first 4 million years of the solar system's formation. The findings indicate that gas giants Jupiter and Saturn must have formed early in the solar system's history.
Researchers at Utah State University have found that helium can bond with sodium to form a stable compound under extreme conditions. The discovery, published in Nature Chemistry, reveals new insights into chemistry beyond Earth's surface.
A new study reveals that hospital antibiotic management strategies, including cycling and mixing, are ineffective in combating antibiotic resistance. The researchers recommend alternative strategies like reactive cycling and individualized treatments to optimize antibiotic use.
Researchers have mapped gases in three dark rings around a distant star, indicating the presence of planets that are clearing dust and gas from the outer rings. However, one inner ring remains mysterious, with more carbon monoxide than expected, leaving scientists to investigate alternative explanations for its formation.
Astronomers have found compelling evidence for the existence of two infant planets orbiting a young star called HD 163296. The planets are estimated to be around the same mass as Saturn and are situated in the disk's outer regions, suggesting they are not yet fully formed.
Research from NASA's Cassini mission data implies Saturn's moons may have formed from the planet's rings rather than being captured by it, with some moons migrating away at an unexpected rate
Researchers discovered the presence of a white spot on Saturn's equator moving at speeds of 1,600 km/h. The study found that winds increase dramatically with depth, reaching up to 1,650 km/h at 150 km below the surface.
A team of researchers presented a new model for the origin of Saturn's rings based on computer simulations. The study found that Kuiper belt objects were destroyed by tidal forces when passing close to giant planets, forming icy ring systems. This process explains the compositional differences between Saturn and Uranus' rings.
Researchers at UAB have successfully created as yet unknown new materials by applying pressures greater than those found at the center of the Earth. By using tiny nanocrystalline-diamond anvils, they were able to reach pressures of up to 264 gigapascals.
A team of researchers has shed light on the origin of centaur rings, revealing a scenario where tidal disruptions lead to disc formation and ring creation. The study suggests that rings around centaurs are more common than previously thought, with many awaiting discovery.
Research from the University of Warwick suggests that Planet Nine's existence could lead to the elimination of a giant planet and its ejection into interstellar space. The hypothetical planet's presence could cause a 'pinball' effect, hurling planets out of the solar system as the sun dies in around seven billion years.
Researchers have discovered liquid methane-filled canyons hundreds of meters deep with walls as steep as ski slopes etched into Titan's surface. The findings provide the first direct evidence of these features and could give scientists insights into Titan's origins and similar geologic processes on Earth.
Dr. John Spencer has received the AGU's Whipple Award for his outstanding contributions to planetary science, including deciphering Enceladus' internal ocean and discovering oxygen on Jupiter's moons.
Researchers have discovered a chemical trail on Saturn's moon Titan that could indicate the presence of prebiotic conditions. The trail was found in the form of hydrogen cyanide, an organic chemical that can react with itself or other molecules to form long chains called polyimine.
Global Aerospace Corporation and Northrop Grumman will develop a new exploration vehicle for Saturn's moon Titan, addressing technical challenges with innovative engineering approaches. The Titan Winged Aerobot concept incorporates ultra-low power requirements and extended vertical range, enabling long-lived flight at low altitudes.