Tag

Atmospheric Pressure

All articles tagged with #atmospheric pressure

space21 days ago•10 min saved

Venus: Earth's near-twin turned runaway-greenhouse furnace

Venus is almost Earth’s twin in size but hosts a surface around 465°C under about 92 times Earth’s atmospheric pressure, due to a runaway greenhouse that likely began when oceans evaporated as the Sun brightened. The planet may have started habitable before losing its water, contrasting with Mars’ fate. Now NASA’s DAVINCI and VERITAS and Europe’s EnVision will probe whether Venus was ever wet and what pushed it into a lethal climate—lessons about how narrow the conditions for habitability really are.

via Space Daily|

#atmospheric-pressure #earth-twin #runaway-greenhouse

science9 months ago•4 min saved

Mini-Neptunes May Have Solid Surfaces, Not Lava Worlds

A new study suggests that many mini-Neptunes, previously thought to be covered in magma oceans, may actually have solid surfaces due to high atmospheric pressure compressing their rocky cores, challenging previous assumptions about these common exoplanets.

via Phys.org|

#atmospheric-pressure #exoplanets #mini-neptunes

science2 years ago•2 min saved

Scientists Create Diamonds from Scratch in 15 Minutes

Scientists have developed a new technique to synthesize diamonds in just 15 minutes at normal atmospheric pressure without needing a starter gem. This breakthrough, detailed in a study published in Nature, uses gallium and silicon in a graphite crucible with super-hot carbon-rich methane gas. While the process still requires refinement, it promises to make diamond creation more accessible and eliminate several drawbacks of traditional synthesis methods.

via BGR|

#atmospheric-pressure #diamonds #gallium

space-science2 years ago•2 min saved

"Atmospheric Pressure Changes Drive Methane Pulses on Mars"

New research suggests that fluctuations in atmospheric pressure on Mars may be responsible for releasing subsurface methane into the planet's atmosphere, posing a challenge for detecting signs of life. Simulations indicate that methane pulses from underground occur just before sunrise in the planet's northern summer season, aligning with previous rover data. This information is crucial for NASA's Curiosity rover's sampling campaign, providing key time windows for data collection to better understand methane fluctuations and potentially uncover the source of methane on Mars.

via Phys.org|

#atmospheric-pressure #curiosity-rover #mars