Cosmic MysteriesA Sharper Spectrum of K2-18 b Reopens the Ocean World Debate
Fresh transmission data tightens constraints on methane and carbon dioxide in the atmosphere of the sub-Neptune 124 light-years away.

Breaking · Oct 12, 2026
From super-greenhouse gases to an artificial magnetosphere, here is the actual engineering sequence scientists have proposed to make Mars habitable — and how long each step would take.
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Cosmic MysteriesFresh transmission data tightens constraints on methane and carbon dioxide in the atmosphere of the sub-Neptune 124 light-years away.
Cosmic MysteriesHubble glimpsed geysers on Jupiter’s icy moon, then lost them. Europa Clipper’s instruments are now calibrated to catch one in the act.

Astronomy Picture of the Day
Towering columns of cool interstellar gas and dust in the Eagle Nebula glow in this near-infrared view. New stars forming inside the pillars appear as bright red orbs at their tips.
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