Europa

Hubble Finds Evidence Of Persistent Water Vapor In One Hemisphere Of Europa

Hubble Finds Evidence Of Persistent Water Vapor In One Hemisphere Of Europa

NASA's Hubble Space Telescope observations of Jupiter's icy moon Europa have revealed the presence of persistent water vapor - but, mysteriously, only in one hemisphere.

Venus

Climate Model Shows That Venus Could Never Have Had Oceans

Climate Model Shows That Venus Could Never Have Had Oceans

Whether Venus, one of the Solar System's four terrestrial planets, ever had oceans remains an unsolved puzzle.

Mars

With First Martian Samples Packed, Perseverance Initiates Remarkable Sample Return Mission

With First Martian Samples Packed, Perseverance Initiates Remarkable Sample Return Mission

With First Martian Samples Packed, Perseverance Initiates Remarkable Sample Return Mission NASA, along with the European Space Agency, is developing a campaign to return the Martian samples to Earth.

Habitable Zones & Global Climate

Climate Uncertainties Caused By Unknown Land Distribution On Habitable M-Earths

Climate Uncertainties Caused By Unknown Land Distribution On Habitable M-Earths

A planet's surface conditions can significantly impact its climate and habitability. In this study, we use the 3D general circulation model ExoPlaSim to systematically vary dayside land cover on a synchronously rotating, temperate rocky planet under two extreme and opposite continent configurations, in which either all of the land or all of the ocean is centred at the substellar point.

Climate

Ocean Life Helps Produce Clouds, But Existing Clouds Keep New Ones At Bay

Ocean Life Helps Produce Clouds, But Existing Clouds Keep New Ones At Bay

Stand on the ocean's shore and take a big whiff of the salt spray and you'll smell the unmistakably pungent scent of the sea. That ripe, almost rotting smell? That's sulfur.

Mars

Rocks On The Floor Of Jezero Crater Show Signs Of Sustained Interactions With Water

Rocks On The Floor Of Jezero Crater Show Signs Of Sustained Interactions With Water

Since the Perseverance rover landed in Jezero crater on Mars in February, the rover and its team of scientists back on Earth have been hard at work exploring the floor of the crater that once held an ancient lake.

Astrochemistry

Photoprocessing Of H2S On Dust Grains: Building S Chains In Translucent Clouds And Comets

Photoprocessing Of H2S On Dust Grains: Building S Chains In Translucent Clouds And Comets

Context. Sulfur is used as a tracer of the evolution from interstellar clouds to stellar systems. However, most of the expected sulfur in molecular clouds remains undetected.

Astrochemistry

The Cosmic Carbon Footprint Of Massive stars Stripped In Binary Systems

The Cosmic Carbon Footprint Of Massive stars Stripped In Binary Systems

The cosmic origin of carbon, a fundamental building block of life, is still uncertain. Yield predictions for massive stars are almost exclusively based on single star models, even though a large fraction interact with a binary companion.

Habitable Zones & Global Climate

Mass Transport In A Moist Planetary Climate Model

Mass Transport In A Moist Planetary Climate Model

Planetary Climate Models (PCMs) are developed to explore planetary climates other than the Earth. Therefore, the methods implemented need to be suitable for a large diversity of conditions. Every planet with a significant atmosphere has condensible cycles (e.g., hydrological cycle), which can play an essential role in the planet's appearance and environment.

Habitable Zones & Global Climate

Carbon Cycling And Habitability Of Massive Earth-like Exoplanets

Carbon Cycling And Habitability Of Massive Earth-like Exoplanets

As the number of detected rocky extrasolar planets increases, the question of whether their surfaces could be habitable is becoming more pertinent. On Earth, the long-term carbonate silicate cycle is able to regulate surface temperatures over timescales larger than one million years.

Extrasolar Planets

Why Do M dwarfs Have More Transiting Planets?

Why Do M dwarfs Have More Transiting Planets?

We propose a planet formation scenario to explain the elevated occurrence rates of transiting planets around M dwarfs compared to sun-like stars discovered by Kepler.

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