Webb telescope captures weather on exoplanet 700 lightyears away, Pg2

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• JWST studied exoplanet WASP-94A b, nearly 700 lightyears away, revealing weather patterns.
• WASP-94A b is a hot Jupiter, almost twice the size of Jupiter but with half the mass, orbiting its star in just four days.
• The exoplanet's dayside is hot enough to melt rock, while the nightside is near absolute zero due to its tidally locked orbit.
• WASP-94A b has dynamic weather: mornings have clouds of magnesium silicate, iron, and magnesium sulphide, while evenings have clear skies.

Detailed Insights:

• Hot Jupiters are gas giants with high atmospheric temperatures and tidally locked orbits, resulting in extreme temperature differences between their daysides and nightsides.
• The transit method was used to study WASP-94A b, where the planet's atmosphere absorbs starlight as it passes in front of its star, revealing atmospheric composition and weather patterns.
• Studying exoplanet atmospheres helps understand planet formation, evolution, and differences compared to planets in our solar system.
• Understanding weather patterns on exoplanets is crucial for accurately estimating their atmospheric composition, which can be biased by cloud cover.
• Future instruments like the Extremely Large Telescope could discover more exoplanet nurseries, increasing the chances of finding Earth-like planets.

Scientific/Technical Concepts Involved:

• Exoplanet: A planet that orbits a star outside our Solar System.
• Hot Jupiter: A gas giant exoplanet with a high surface temperature and close orbit to its star.
• Tidally Locked: When an object's orbital period matches its rotational period, resulting in one side always facing the object it orbits.
• Spectroscopy: Analyzing light wavelengths to determine the composition of a substance, such as a planet's atmosphere.