Science & Discovery
Space science and discovery from Cosmic Herald — planetary science, cosmology, astrobiology, and the search for life beyond Earth.
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Science & Discovery
The little moon that sprays its ocean into space — and why it tops the list for life
Enceladus is a frozen moon of Saturn barely 500 kilometres across, but it does something no other world is known to do: it jets plumes of its hidden ocean directly into space, where a spacecraft can taste them. What's in those plumes has made it a prime target in the search for life.
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Science & Discovery
Two 1970s spacecraft are still calling home from interstellar space — but the lights are going out
Nearly half a century after launch, both Voyager probes are flying through interstellar space, the only human-made objects to leave the Sun's bubble. Their power is fading, and engineers are switching off instruments one by one to keep the faint signal alive a few years longer.
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Science & Discovery
The spacecraft that flies into the Sun's atmosphere — and keeps coming back
Parker Solar Probe has now made its closest approaches to the Sun more than two dozen times, screaming through the corona at 430,000 miles per hour. It is the fastest object humans have ever built, and it is rewriting what we know about our star.
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Science & Discovery
China's probe is closing on a tiny asteroid that may — or may not — be a piece of the Moon
Tianwen-2 reaches the quasi-moon Kamo'oalewa this month to grab a sample. Just as it arrives, a new study undercuts the leading theory of what the object even is — a reminder that we often visit worlds before we understand them.
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Science & Discovery
Curiosity found the richest haul of organic molecules yet on Mars — and a careful reason not to call it life
A rock the rover drilled in 2020 has yielded the most diverse set of carbon-bearing molecules ever detected on Mars, preserved for billions of years in clay that once held water. It's a tantalizing result — and a case study in scientific restraint.
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Science & Discovery
The universe's hidden scaffolding, mapped in record detail
Using the largest survey JWST has yet undertaken, astronomers placed 164,000 galaxies onto the most detailed map ever made of the cosmic web — the filamentary skeleton along which all structure in the universe is strung.
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Science & Discovery
11,000 asteroids in six weeks — and Rubin's real survey hasn't started yet
From a month and a half of warm-up data, the Vera C. Rubin Observatory has already logged more new asteroids than the rest of the world found all year. Once the ten-year survey begins in earnest, that figure becomes a rounding error.
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Science & Discovery
Saturn now has 285 moons — and the count keeps climbing
A 2026 batch of discoveries pushed Saturn's moon tally to 285 and Jupiter's to 101. The new satellites are tiny, faint, and a sign that a new generation of survey telescopes is just getting started.
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Science & Discovery
The Hubble tension: a 5-sigma crack in the standard model
Two rigorous ways of measuring how fast the universe expands disagree by about 9%, at better than five sigma. A decade of scrutiny — most recently with JWST — has failed to dissolve it, and the discrepancy may be pointing at physics beyond the standard cosmological model.
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Science & Discovery
From one solar system to six thousand worlds
Thirty years after the first planet was found around a Sun-like star, NASA's confirmed exoplanet count has passed 6,000 — almost none of them ever directly imaged. The methods that found them now drive a far harder pursuit: reading their atmospheres for signs of life.
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Science & Discovery
What a fleet of telescopes learned from our third interstellar visitor
The interstellar comet 3I/ATLAS has been probed across the spectrum — Webb found methane, ALMA found water unlike any local comet's, and X-ray observatories caught it glowing. A SETI search for technosignatures came up empty.
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Science & Discovery
A nearby dwarf galaxy is a blueprint for the universe's first dust
Webb found unexpected dust-making in Sextans A, a chemically primitive dwarf galaxy — evidence that the earliest galaxies could forge solid grains by pathways unlike those that dominate today.
