James Webb studies exoplanet atmospheres using transit spectroscopy. When a distant planet passes in front of its star, a tiny fraction of starlight travels through the planet’s atmosphere before reaching the telescope. Different gases absorb specific wavelengths of light. By measuring these changes, scientists can identify molecules like water vapor, carbon dioxide, and methane. This method doesn’t rely on images of clouds or surfaces. It’s based on precise light measurements collected by the J
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James Webb studies exoplanet atmospheres using transit spectroscopy. When a distant planet passes in front of its star, a tiny fraction of starlight travels through the planet’s atmosphere before reaching the telescope. Different gases absorb specific wavelengths of light. By measuring these changes, scientists can identify molecules like water vapor, carbon dioxide, and methane. This method doesn’t rely on images of clouds or surfaces. It’s based on precise light measurements collected by the J
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