Articles tagged with Planetary Atmospheres
A team from UNIGE has observed a sample of planets at the edge of the Hot Neptune Desert to understand its creation. They found that most of these planets have an orbit misaligned with the stellar equator, indicating disruptive migration processes.
A new model accounts for the interplay of forces acting on newborn planets, explaining two puzzling observations: the radius valley and peas in a pod. The research suggests that giant impacts, like the one that formed our moon, are probably a generic outcome of planet formation.
Astronomers found that a planet like GJ 1252b, orbiting an M dwarf star, would likely lose its atmosphere due to intense heat and radiation. The discovery narrows the search for habitable planets around these stars, but leaves room for possibilities further away from the star.
A new system classifies atmospheres of distant planets to identify those suitable for future human habitation, without physically visiting them. The research study found that planet TRAPPIST-1e has a significantly more sensitive atmosphere than Earth, which could lead to extreme climate changes.
Researchers have developed a method to map an asteroid's interior structure based on its spin changes during close encounters with Earth. This technique, called AIME, could help scientists plan more effective defense strategies for asteroids like Apophis, which poses a significant hazard if it were to make impact.
Researchers find that airborne chemical methyl bromide is a compelling indicator of biological activity on other planets. Its detectability increases around M dwarf stars, making it an attractive target for future missions to search for extraterrestrial life.
Researchers propose nitrous oxide as a potential biosignature for exoplanets, detectable by the James Webb Space Telescope. They modeled N2O production on Earth-like planets and found it could be comparable to CO2 or methane in star systems like TRAPPIST-1.
Researchers located four new craters created by impacts on Mars' surface using data from a seismometer and visuals acquired from the Mars Reconnaissance Orbiter. This is the first time that researchers have captured the dynamics of an impact on Mars.
A new MIT study suggests that current opacity models used by astronomers may not be accurate enough to interpret the precise light-based signals from the James Webb Space Telescope. The researchers predict that properties of planetary atmospheres, such as temperature and elemental composition, could be off by an order of magnitude if e...
Researchers discovered a Neptune-sized planet around a bright blue star, shedding light on the dearth of Hot Neptunes. The planet's proximity to its star makes it susceptible to stripping of its gas, but it may survive for a billion years.
Researchers develop a motorless sailplane concept that harnesses wind energy to explore Mars' atmosphere and geology. The innovative design, inspired by albatross flight, enables the sailplanes to fly for days at a time without relying on solar panels or batteries.
A new study published in Nature Communications found that life cannot explain the composition of Venus' atmosphere. The researchers used a combination of biochemistry and atmospheric chemistry to test the 'life in the clouds' hypothesis, but their results showed no evidence of chemical fingerprints from life forms on Venus.
Researchers at Purdue University found that the presence of salt in seawater can impact a planet's habitability, with saltier oceans tending to result in warmer climates. This discovery may allow life beyond our solar system to exist further from its host star than previously thought.
The Gemini North telescope has helped astronomers understand why Uranus and Neptune have different colors. Excess haze on Uranus builds up in its stagnant atmosphere, making it appear lighter than Neptune's. The team developed a single atmospheric model that matches observations of both planets.
An international team of researchers analyzed data from 25 hot Jupiters, finding a link between thermal inversions and the presence of hydrogen anion and metallic species. These findings will help establish a generalized theory of planet formation, improving our understanding of all planets, including Earth.
The study suggests that Venus' atmosphere plays a crucial role in determining its rotation speed, with fast winds dragging along the surface and slowing it down. This has significant consequences for the sweltering Venusian climate, with average temperatures of up to 900 degrees Fahrenheit.
A new study by University of Leicester researchers reveals Neptune's atmospheric temperatures have dropped by roughly 8 degrees Celsius between 2003 and 2018, with unexpected stratospheric warming at the south pole. The cause of these changes is currently unknown, but may be related to seasonal variations in atmospheric chemistry.
Researchers used NASA's Planetary Spectrum Generator to analyze light from Venus, Mars, and Jupiter, shedding new light on the presence of biosignatures and chemical compounds. The study helps clarify the association between methane on Mars and life, as well as the fate of Martian water.
A team of researchers led by Purdue University's Michael Sori found that smaller Martian ice deposits hold key evidence for the planet's orbit and axial tilt's impact on its climate. The study used NASA's HiRISE camera images to analyze layer shapes in an ice deposit, providing insights into Mars' climate history.
Dr Henrik Melin, a researcher at the University of Leicester, has been awarded the third-ever Webb Fellowship to study the atmospheres of giant planets using the James Webb Space Telescope. He aims to understand the mechanisms driving powerful aurorae on these planets and address the 'energy crisis' in their upper atmospheres.
Researchers found a chemical link between wildfire smoke and ozone depletion, which may stall ozone recovery for years. The study discovered that the smoke from Australian wildfires in 2019-2020 depleted ozone by 1%, highlighting the potential impact of future, more frequent fires.
The study provides the first detailed view of an exoplanet's global atmosphere, revealing a water cycle that dwarfs Earth's jetstream. The planet's night side is home to iron clouds, titanium rain, and winds that whip around at speeds of up to 5 kilometers per second.
Researchers at the University of Leicester have discovered a new mechanism driving Saturn's massive aurorae, which are fueled by swirling winds in its upper atmosphere. This discovery answers one of NASA's Cassini mission mysteries and highlights the complex interactions between atmospheric weather and aurora creation.
A comprehensive 'vertical map' of airborne microorganisms has been created, showing that temperature is the single most important factor influencing their composition. As global temperatures rise, this could lead to significant changes in the air microbiome, affecting human health and food security.
Astronomers have detected two mini-Neptune planets losing their atmospheres due to stellar radiation. The finding provides evidence that these worlds may be transforming into super-Earths. The study uses data from W. M. Keck Observatory and NASA's Hubble Space Telescope.
Researchers discovered a complex relationship between Jupiter's magnetic field, volcanic activity on its moon Io, and the planet's powerful aurorae. The study revealed an electromagnetic 'tug-of-war' lights up aurorae in Jupiter's upper atmosphere.
A new study proposes that life could neutralize acidic environment, creating habitable pockets in Venus' clouds. The researchers identified a chemical pathway by which life could produce ammonia, explaining observed anomalies and anomalies.
Researchers used fusion reactors to test spacecraft heat shield materials, achieving conditions similar to those encountered during high-speed atmospheric entries. The experiments demonstrated improved accuracy in modeling heat shield behavior, offering promise for developing advanced materials necessary for future missions.
Researchers used Hubble Space Telescope observations and theoretical models to study a broader population of hot Jupiters. The study provides insight into planet formation and suggests that these planets contain similar sets of molecules, including water and carbon monoxide.
Researchers have discovered evidence of a giant impact that occurred in a nearby star system, stripping part of the planet's atmosphere. The team observed carbon monoxide gas around the star, which they believe was released from a massive impact involving two proto-planets.
The Perseverance rover's first scientific analysis confirms Jezero crater was a calm lake for most of its existence, interrupted by flash floods that carried huge boulders downstream. The findings provide clues to Martian climate evolution and offer opportunities to search for signs of ancient life.
Scientists study potential for life around M-dwarf planets with new telescope, finding atmospheres may be dried out due to intense radiation. The James Webb Space Telescope can detect gases in heavy carbon dioxide or oxygen-dominated atmospheres.
Clouds have been detected on the distant exoplanet WASP-127b, and their altitude has been measured for the first time. The observations reveal that water vapor is present at lower levels but screened by clouds opaque to visible light, while sodium is found in an unexpected place.
Researchers propose that giant hailstones called mushballs carry ammonia deep into the atmospheres of ice giants Uranus and Neptune, hiding it from detection. This process could explain the unexpected lack of ammonia in their atmospheres compared to other planets.
Researchers at UC Santa Cruz heated meteorite samples in a high-temperature furnace and analyzed the gases released. The study suggests that the initial atmospheres of terrestrial planets may differ significantly from current theoretical models.
A new study using supercomputer simulations reveals the scale of atmosphere loss during giant planetary collisions. Grazing impacts led to less atmospheric loss than direct hits, while higher speeds resulted in complete erosion of the atmosphere. The research provides insight into the evolution of planets and their atmospheres.
New analysis of data from NASA's Cassini spacecraft reveals that auroral electric currents are likely responsible for heating Saturn's upper atmosphere. The study provides the most complete mapping yet of temperature and density in a gas giant's upper atmosphere, shedding light on how heat circulates in the region.
A team of astronomers discovered three areas in the disk of a young star where gas is cascading into gaps, indicating the presence of forming planets. The study confirms a theory about how planets acquire their atmospheres, suggesting that warmer gas from the outer layers of the disk forms the atmosphere of the planet.
Researchers observed unique gas flows and identified three predicted planets around young star HD 163296. The gas flows, like waterfalls, indicate the presence of infant planets pushing aside dust and gas, providing evidence for planet formation. The study offers a more complete picture of planet formation than previously thought.
The study reveals that hot Jupiter WASP-121b is losing its hydrogen and helium atmosphere due to strong gravity, allowing heavier elements like magnesium and iron to escape. The observations provide insights into the planet's extreme environment and its potential for hosting life.
Scientists have detected an exoplanet atmosphere free of clouds, marking a pivotal breakthrough in understanding planets beyond our solar system. The 'hot Saturn' WASP-96b's clear sodium signature is the result of its cloud-free atmosphere.
A new analysis of Pluto's hydrocarbon haze reveals a novel cooling mechanism controlling the dwarf planet's frigid atmosphere. The study proposes that haze particles absorb heat and emit infrared radiation, resulting in an atmospheric temperature of about 70 Kelvin.
A new NASA mission concept aims to study why planets lose their atmospheres. The proposed Mechanisms of Energetic Mass Ejection-Explorer (MEME-X) mission will use Earth as a laboratory, focusing on the loss of mass in the upper atmospheric layers and its interaction with solar wind.
Researchers from MIT and the University of Liège announce a new study on the TRAPPIST-1 planetary system, which hosts three potentially habitable, Earth-sized worlds. The team discovers that two innermost planets have compact atmospheres similar to those of rocky planets like Earth, Venus, and Mars.
Scientists say human activity has left a pervasive signature on Earth that warrants recognition as a new geological time unit. This 'Anthropocene' epoch will be marked by uniquely human products and global markers such as carbon particulates, nitrogen, phosphorus, and nuclear fallout.
A team of astronomers has solved the long-standing mystery of missing water in hot Jupiter-sized exoplanets by analyzing atmospheric data from NASA's Hubble and Spitzer space telescopes. The study found that cloudy atmospheres are responsible for hiding water, ruling out dry hot Jupiters.
Scientists using NASA's Hubble Space Telescope have produced new maps of Jupiter, capturing its winds, clouds, storms, and atmospheric chemistry. The observations revealed a rare wave just north of the planet's equator and a unique filamentary feature in the Great Red Spot.
A swarm of microprobes with different sensors could be sent to Jupiter, collecting data as they fall and transmitting it before burning up. This mission concept aims to study the planet's atmosphere and shed light on its composition, solar nebula formation, and impact history.
Researchers use Hubble and Spitzer Space Telescopes to study super-Earths, discovering that water worlds are possible compositions. The team's analysis reveals that super-Earths could have acquired their mass by pulling in solid material from distant orbits.
A team of scientists used the Hubble Space Telescope to create a detailed weather map of WASP-43b, tracing the planet's temperature and water vapor content. The study found that the exoplanet has winds that can reach up to 1500 degrees Celsius, with temperatures on the day side hot enough to melt iron.
A team of astronomers using NASA's Hubble Space Telescope measured water vapour in the atmospheres of three gas giants, finding levels one-tenth to one-thousandth that predicted by standard theory. This discovery raises questions about exoplanet formation and highlights challenges in searching for water on Earth-like planets.
Researchers found water vapour abundance to be between ten and a thousand times less than predicted models, raising questions about the chemical processes involved in planet formation. The discovery has implications for searching for life on exoplanets capable of supporting it.
Astronomers using NASA's Hubble Space Telescope found three 'hot Jupiters' with significantly lower than expected water vapor levels, challenging current theories on planet formation and migration. The discovery may require instruments to be designed with higher sensitivity for future space telescopes searching for water in potentially...
French and Russian scientists have identified two types of dust particles in the Martian atmosphere, contradicting previously obtained data on supersaturated steam formation. The coarser mode consists of larger ice grains, while the finer mode is an aerosol with tiny particles that play a key role in climate formation.
A team of scientists at Penn State University has detected water vapor in the atmosphere of a hot-Jupiter exoplanet, tau Boötis b. This discovery could help researchers understand how many planets like Earth exist throughout the universe and provides new insights into the formation and evolution of exotic hot-Jupiter planets.
Astronomers detected significant atmospheric variations on HD 189733b due to a stellar flare, with gas escaping at speeds over 300,000 mph. The discovery provides insights into the interaction between a star and its giant planet.
Scientists use Schumann Resonance technique to study planetary atmospheres, gaining insights into the solar system's composition and formation. By detecting electromagnetic waves from above, researchers can measure global density of volatiles like water, methane, and ammonia.
Dr. F. Michael Flasar, Dr. Anthony D. Del Genio and Dr. James Slavin recognized for their outstanding contributions to Earth and space sciences. Flasar's work on planetary atmospheres, including Titan's unique atmosphere, was highlighted as fundamental to understanding climate physics.
Researchers at UCL have identified a critical point of no return for gas giants, beyond which their atmospheres become unstable and rapidly expand. At this threshold, the cooling mechanism breaks down, leading to catastrophic consequences.
Astronomers have detected water vapor in the atmosphere of HD 189733b, a gas giant 63 light-years away. The presence of water vapour suggests that the planet may have had liquid water on its surface at some point, increasing hopes for detecting life on other rocky planets.