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 CNO Cycle: How Massive Stars Burn Hydrogen Differently Than the Sun
The Sun fuses hydrogen through the proton-proton chain. Stars more than twice as massive use a completely different nuclear pathway — one that uses carbon, nitrogen, and oxygen as catalysts and burns hotter, faster, and far more violently.
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Science & Discovery
When Neutron Stars Collide: How Kilonovae Forge the Universe's Heavy Elements
Gold, platinum, uranium — the heaviest elements in the periodic table weren't forged in ordinary stars. They were made in the violent milliseconds of neutron star mergers, and in 2017, we watched it happen for the first time.
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Science & Discovery
Your phone's GPS is a real-time test of general relativity — and it passes every day
GPS satellites experience time dilation from both their orbital speed and their position in Earth's gravitational field. Without constant relativistic corrections, GPS would drift by kilometers per day. The system works only because Einstein was right.
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Science & Discovery
Gravity as a telescope: how Einstein rings are mapping dark matter
Gravitational lensing bends light from distant galaxies around massive foreground objects, creating arcs and Einstein rings. Astronomers have turned this relativistic quirk into a precision instrument for weighing dark matter — and the results are reshaping cosmological models.
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Science & Discovery
The biggest 3D map of the universe ever made just got bigger. What DESI is finding.
The Dark Energy Spectroscopic Instrument has mapped tens of millions of galaxies across billions of years of cosmic history. The results are testing whether dark energy — the mysterious force accelerating the universe's expansion — behaves the way physicists assumed it did. Early hints suggest it might not.
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Science & Discovery
Life on icy moons: what extremophiles on Earth are teaching us to look for
The search for life beyond Earth is increasingly focused on the subsurface oceans of moons like Europa and Enceladus. Understanding what that search requires means understanding life's extremes here first — and Earth's most extreme environments keep revealing biology that expands the definition of habitable.
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Science & Discovery
Mars had an ocean. New evidence is filling in how long it lasted.
Decades of Mars exploration have assembled strong evidence that the northern lowlands once held a vast ocean of liquid water. New analysis of orbital data and rover measurements is sharpening our picture of when that ocean existed, how deep it ran, and when it disappeared — which narrows the window when life might have been possible.
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Science & Discovery
Phosphine on Venus: four years later, what the research actually says
The 2020 claim that phosphine — a potential biosignature gas — had been detected in Venus's atmosphere sparked one of the most contentious debates in recent planetary science. Years of follow-up observations and analysis have clarified the picture, though not fully resolved it.
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Science & Discovery
The Sun is at its most active in two decades. What solar maximum actually means.
Solar Cycle 25 has been more active than forecasters predicted, delivering some of the strongest geomagnetic storms in years and producing aurora visible at unusually low latitudes. What solar maximum means for technology, satellites, and power grids — and how we prepare — is more relevant now than it has been in a generation.
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Science & Discovery
The Wow! Signal is 47 years old. We still don't know what it was.
On August 15, 1977, a radio telescope at Ohio State University detected something that fit every expected signature of a signal from extraterrestrial intelligence. It was never detected again. Decades of follow-up have generated hypotheses but no consensus. Here is where that investigation stands.
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Science & Discovery
How black holes actually grow: new X-ray observations are filling in the picture
Black holes grow by consuming nearby gas and dust — but the details of how that accretion works, and how it produces the relativistic jets that extend for millions of light-years, are still being worked out. A new generation of X-ray telescopes is catching the process in action.
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Science & Discovery
Three moons in the outer solar system have conditions that could support life. We've barely started looking.
Enceladus has a liquid ocean venting organics and hydrogen into space. Europa has a global ocean under an ice shell. Titan has lakes of liquid methane and a complex organic chemistry. All three are active targets for future astrobiology missions.
