A Space Daily column

Deep Field

Astronomy and cosmology

Deep Field covers astronomy and cosmology. Telescopes and what they find, planets near and far, and the strange physics of the deep universe, traced back to the journal papers and observatory data behind the headlines.

Saturn Daily

Titan was called an ocean world for more than fifteen years, but a reanalysis of Cassini’s radio tracking published in Nature has quietly taken the ocean away — the moon’s tidal response lags Saturn’s pull by about fifteen hours, which fits slush and small pockets of warm water rather than a global sea

A decade-old theory about a hidden ocean on Saturn's moon Titan is collapsing, replaced by a messier picture of slush and isolated water pockets that upends our understanding of where life might exist beyond Earth.

Aug 14, 2026

Venusian Heat

Earth and Venus are almost twins in size, mass and gravity. Earth’s highest mountains are capped with frozen water; Venus’s may be coated in metallic frost containing lead and bismuth sulfides. Somehow, two remarkably similar planets took radically different paths—and scientists still don’t know exactly when or why.

Venus’s radar-bright highlands may carry lead- and bismuth-bearing frost, but the proposed coating and the planet’s divergence from Earth remain unresolved.

Aug 14, 2026

Aerospace

The highest-resolution images ever taken of the Sun’s surface revealed whirlpools of plasma only 20 kilometres wide — the same instability that curls ocean waves and Jupiter’s clouds — and it may explain why the Sun’s outer atmosphere runs a million degrees hotter than the surface beneath it.

A mysterious heat engine lurks in the Sun's turbulent surface, where universal physics—the same forces that sculpt ocean waves and storm clouds—may finally solve why our star's corona blazes hotter than its own source of fire.

Aug 14, 2026

Deep Space

The observable universe may hold a septillion stars, yet complex life could still be extraordinarily rare. If the Rare Earth Hypothesis is right, the silence from space may not be a paradox at all.

A septillion stars supplies an enormous number of opportunities, but Rare Earth asks whether the conditional path to complex, detectable life may be vastly less probable.

Aug 13, 2026

Aerospace

During the total solar eclipse of July 8, 1842, an astronomer watched the ground itself start to ripple — thin bands of light chasing each other across open earth in the last seconds before the sky went fully dark, and 184 years later, nobody has proven why

A centuries-old mystery persists even as astronomers have grown better at watching the sky—and they still can't fully explain what made the earth appear to breathe during that eclipse.

Aug 13, 2026

Science

NASA researchers now estimate the Milky Way holds 20 times more rogue planets than stars — trillions of worlds wandering alone in the dark, untethered to any sun, some potentially the size of Earth

A nine-year microlensing survey implies roughly 20 free-floating or very wide-orbit planets per star, but the trillions figure is a model with broad uncertainty, not a direct census.

Aug 13, 2026

Science

The popular claim that every star you see is already dead is the opposite of true — naked-eye stars are so relatively close and live so extraordinarily long that astronomers estimate only about one dies every 10,000 years, meaning the night sky is almost entirely alive

The light from every star is old, but naked-eye stars are nearby and their lives are vastly longer than the delay. The familiar night sky is not a stellar graveyard.

Aug 13, 2026

Deep Space

A 2025 reanalysis of the original Wow! signal found it was even stronger than astronomers had thought. One new explanation is extraordinary: a flare from a magnetar may have struck a cold cloud of hydrogen in deep space, causing it to blaze briefly at the hydrogen radio frequency — an astronomical event that may never have been recorded before.

Recovered Big Ear calibration records make the 1977 Wow! signal brighter and better located, while a magnetar-triggered hydrogen flare remains unconfirmed.

Aug 13, 2026

Space Scopes

A planet nearly 700 light-years away has clouds that form on its cooler morning side and disappear by the time the atmosphere reaches its scorching evening side. James Webb has given astronomers their clearest look yet at a world where the clouds may be made from rock-forming minerals rather than water.

Webb separated WASP-94A b's cloudy morning and clear evening limbs, exposing a mineral-cloud cycle and a hidden source of error in atmospheric chemistry.

Aug 13, 2026

Science

Halley’s Comet will return to the inner solar system and reach perihelion on July 28, 2061. Its next return after that won’t come until 2134 — meaning that for many people alive today, 2061 will be their one realistic chance to see the most famous comet in history.

Halley’s Comet is calculated to reach perihelion on July 28, 2061. The date is precise, but the best viewing window, brightness and human stakes require context.

Aug 13, 2026

Science

Everything you have ever touched — every mountain, ocean, star, and galaxy visible through any telescope — is made of the 5% of the universe that physicists can actually account for. The other 95% has no name beyond ‘dark’, and no confirmed identity at all.

Ordinary atomic matter supplies only about five per cent of the universe's mass-energy budget. Gravity and cosmic expansion reveal the rest without yet revealing what dark matter and dark energy are.

Aug 12, 2026

Solar Science

NASA’s ensemble forecast named the minute an August solar eruption would reach Earth, but its 22-hour uncertainty window shows why one perfect hit does not solve space weather

Predicting a solar storm to the minute sounds like a breakthrough—until you realize the forecast was equally uncertain about whether it would arrive a full day earlier or later.

Aug 12, 2026

Solar Science

In 1859, a solar storm now called the Carrington Event induced currents so strong in North American telegraph lines that operators disconnected their batteries and kept sending messages on the geomagnetic current alone, while auroras lit up the sky over Cuba and Hawaii

A geomagnetic storm so powerful it turned the planet itself into a telegraph battery—and nearly nobody noticed.

Aug 11, 2026

Aerospace

A robotic rover sitting on the surface of Mars photographed real clouds glowing red, green and blue, made of frozen carbon dioxide catching sunlight long after the ground beneath them had gone dark

The clouds above Mars glow in colors that defy everything we know about how planets work, revealing an atmosphere far stranger than we imagined.

Aug 8, 2026

Constellations

When the FAA proposed letting commercial rocket licenses bypass specified requirements under 13 federal laws, it paired a 1984 waiver power with a Supreme Court ruling about an 88-mile Utah oil railway, carrying a regulatory argument from rail tracks to launchpads

A decades-old waiver power and an obscure Supreme Court case about a Utah railroad are now central to whether the FAA can strip environmental and safety reviews from commercial rocket launches.

Jul 31, 2026

Outer Planets

The bright nitrogen ice plain forming the left lobe of Pluto’s heart has not a single impact crater anywhere on it, which tells planetary scientists the surface is being churned from below and completely replaced on a cycle short enough that parts of that ground are younger than our own species

Pluto's heart is erasing its own history, its nitrogen plains so geologically restless that they shed impact scars faster than they accumulate them.

Jul 31, 2026