Sulfur Atmospheres, 3D Exoplanet Maps & Perseverance Breaks Mars Record
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Sulfur Atmospheres, 3D Exoplanet Maps & Perseverance Breaks Mars Record
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(00:01:38) WASP-17b Atmosphere Mapped in 3D
(00:03:01) Perseverance Breaks Mars Distance Record
Three major science stories land in today's episode, and each one signals that our instruments have crossed a threshold.
First, astronomers have confirmed sulfur in the atmospheres of the giant planets orbiting HR 8799 — a system 133 light-years away hosting four gas giants between five and ten Jupiter masses. Core accretion theory was never supposed to produce worlds this large, but sulfur is a refractory element that only appears in an atmosphere if a solid core formed first. It's the first direct chemical evidence that core accretion can operate at masses we'd previously ruled out — and it rewrites planetary formation science.
Next, a separate team has produced the first three-dimensional atmospheric map of an exoplanet. Using a new technique called transmission mapping, researchers dissected the atmosphere of WASP-17b — a tidally locked hot Jupiter — into distinct slices as it transited its star. The resulting data revealed a strongly asymmetric atmosphere shaped by wind-driven temperature gradients that averaged measurements had completely hidden. With over 6,000 confirmed exoplanets, almost all measured using that flattened single-ring approach, transmission mapping is a capability leap that applies immediately and broadly.
Finally, NASA's Perseverance rover crossed 28.1 miles on Mars, surpassing Opportunity's 15-year record in just five and a half years. The autonomous driving system AutoNav handles around 90% of the rover's navigation, letting it move faster and further without waiting for commands from Earth. The mission's first extension has been approved, keeping Perseverance on course for hydrothermal sites where biosignature science — including the enigmatic Cheyava Falls rock — will be put to the test.
A YesWee production, built using AI technology.
This episode includes AI-generated content.
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