All articles
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Astronomy
The Milky Way's skeleton is made of ghost stars — and Gaia is mapping every one
Gaia has revealed dozens of stellar streams threading through the galaxy — thin ribbons of stars from ancient satellite galaxies and globular clusters torn apart over billions of years. Astronomers are now reading them for evidence of dark matter and the Milky Way's violent past.
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Science & Discovery
After a century of searching, we know where at least some cosmic rays come from
Victor Hess discovered cosmic rays in 1912 but could not trace their origin — magnetic fields erase their direction in transit. More than a century later, IceCube has linked high-energy neutrinos to NGC 1068, the first confirmed extragalactic neutrino source.
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Science & Discovery
Magnetars are neutron stars with magnetic fields strong enough to restructure atoms — and they are reshaping our understanding of dense matter
A magnetar packs the mass of the Sun into a sphere the size of a city, then generates a magnetic field 10^15 times stronger than Earth's. The physics at work inside them cannot be reproduced in any terrestrial laboratory — which makes their X-ray and radio bursts the only experimental data we have on matter at nuclear density.
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Missions
Perseverance is building the strongest case yet for ancient life on Mars — one core sample at a time
The Jezero crater delta is the most geologically promising site ever studied on Mars. Perseverance has now cored and cached dozens of samples — including Cheyava Falls, a rock whose leopard-spot textures and organic chemistry are the best candidate biosignatures yet found on another world.
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Astronomy
Webb is revolutionizing the science of brown dwarfs — objects that blur every boundary we use to define a star
Too massive to be planets but too small to fuse hydrogen, brown dwarfs occupy an awkward middle ground. Webb is now probing their atmospheres with unprecedented depth — and finding objects that challenge everything from the definition of 'star' to the origin of Jupiter-mass bodies floating freely in space.
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Commercial
The satellites won. Now astronomers are learning to live with 40,000 of them.
Starlink, OneWeb, and their competitors have fundamentally changed the night sky. The question is no longer whether to stop the constellations — it's whether engineering fixes and international regulation can preserve professional astronomy before Vera Rubin comes online.
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Stargazing
The Night Sky for the Rest of June 2026: A Planet Parade, a Venus Occultation, and the Strawberry Moon
Mercury joins Venus and Jupiter in the evening twilight, the crescent Moon lines up with all three on June 16, then occults Venus on the 17th. Add the solstice, noctilucent clouds, and the low-riding Strawberry Moon on June 29 — your night-by-night guide to the rest of the month.
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Missions
Still to Fly in 2026: Roman, a Moon-Lander Wave, India's Crew Capsule Test, and Japan's Phobos Grab
Artemis II is done — but 2026's manifest isn't. NASA's Roman Space Telescope launches August 30, four lunar landers chase year-end windows, Gaganyaan-1 rehearses India's first crewed flight, and JAXA's MMX departs for Phobos. What's still scheduled, what slipped, and which dates to believe.
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Commercial
With the ISS nearing retirement, the race to build its replacement is on
The International Space Station is slated to retire around 2030, and NASA is betting that private companies will build what comes next. A wave of record funding in 2026 is fueling a contest among several rival stations to be first.
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Astronomy
The coldest planet we've ever photographed seems to have icy clouds
JWST directly imaged Epsilon Indi Ab, a frigid super-Jupiter next door, and found less ammonia than models predict. The likely culprit — patchy water-ice clouds — would make it the first such clouds spotted on a giant world beyond the Solar System.
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Missions
Japan's veteran asteroid hunter lines up a 5-kilometer-per-second flyby
Years after returning samples from Ryugu, Japan's Hayabusa2 is still flying — and on July 5 it will scream past a 450-meter asteroid called Torifune at five kilometers per second, a rehearsal for the planetary-defense techniques of the future.
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Astronomy
Webb stares at a rocky exoplanet and sees nothing — which tells us plenty
JWST's mid-infrared look at the rocky world LHS 3844b found a dark, featureless surface and no sign of an atmosphere. For exoplanet scientists, a bare rock is a data point about which small worlds can hold onto air at all.
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