All articles
-
Science & Discovery
Something massive might be hiding at the edge of the solar system. Here's the evidence for and against.
A cluster of distant Kuiper Belt objects have orbits that seem to point toward an unseen planet — perhaps 5 to 10 times Earth's mass, orbiting 400 to 800 AU from the Sun. The hypothesis is compelling, the search is active, and the skeptical case is real.
-
Commercial
The company quietly building the ISS's replacement, one pressurized module at a time
Axiom Space has flown four private astronaut missions to the ISS, is designing the spacesuits for Artemis moon walks, and is under contract to attach its own commercial module to the station before 2030. When the ISS is decommissioned, Axiom's section will detach and operate independently.
-
Science & Discovery
Where did the Moon come from? Apollo's rocks are still answering that question.
The giant impact hypothesis — a Mars-sized body struck the early Earth and the debris coalesced into the Moon — has dominated lunar science for 40 years. New analyses of Apollo samples and Chinese lunar returns are both confirming and complicating it.
-
NASA & Agencies
Boeing's crew capsule is still on the ground. What Starliner's failure means for human spaceflight.
Boeing's Starliner flew its first crewed mission in June 2024 — and left two astronauts stranded on the ISS for nine months after thruster failures and helium leaks forced NASA to return the capsule uncrewed. As of mid-2026, Starliner's future remains unresolved.
-
Astronomy
Quasars are the most luminous objects in the universe — and they tell us how galaxies are built
When Maarten Schmidt measured the redshift of 3C 273 in 1963, he realized he was looking at something 2 billion light-years away outshining entire galaxies. Sixty years later, quasars are understood as the most extreme phase of supermassive black hole growth — and keys to understanding how every large galaxy, including ours, formed.
-
Science & Discovery
For 30 years, the Sun appeared to be broken. Then we realized the problem was the neutrino.
Ray Davis built a detector in a gold mine and counted solar neutrinos for decades — finding only a third of what theory predicted. The discrepancy that resulted forced physicists to rewrite the Standard Model and earned two Nobel Prizes.
-
Stargazing
The summer Milky Way is the most spectacular thing you can see with your eyes — here's how to find it
From late June through September, the galactic center passes overhead for northern hemisphere observers, and the Milky Way glows brightest toward Scorpius and Sagittarius. This is what you're looking at, how to find it, and what to look for within it.
-
Astronomy
Every massive object in the universe is also a telescope — and we've learned to use them
Einstein predicted in 1915 that gravity bends light. Eddington confirmed it in 1919. A century later, gravitational lensing has become one of the most productive techniques in observational astronomy — revealing dark matter, finding exoplanets, and letting us see the first galaxies.
-
Missions
The most pristine object we have ever visited rewrote the story of how planets are made
On New Year's Day 2019, New Horizons flew past Arrokoth — a snowman-shaped contact binary in the Kuiper Belt, 6.6 billion kilometers from Earth. What it found there upended the dominant theory of how planetesimals form and pointed toward a gentler, quieter origin for the building blocks of planets.
-
NASA & Agencies
ESA's JUICE is threading five planetary flybys to reach the most interesting moons in the solar system
Launched in April 2023, JUICE — Jupiter Icy Moons Explorer — will arrive at Jupiter in 2031 after a gravity-assist marathon. Its destination is Ganymede, where it will become the first spacecraft ever to orbit a moon other than our own.
-
Stargazing
The Perseids peak in August — here's how to make the most of the best meteor shower of the year
Every August, Earth plows through the dusty wake of Comet Swift-Tuttle, producing up to a hundred meteors an hour from a single radiant point in Perseus. The Perseids are reliable, rich in fireballs, and require no equipment. Here's everything you need to catch them.
-
Science & Discovery
Fast radio bursts are the most energetic millisecond events in the universe — and we're finally finding their sources
For two decades, fast radio bursts were detected but unexplained — extragalactic flashes of radio energy that lasted a millisecond and were gone. CHIME changed the scale of the problem. A magnetar flare in 2020 finally pointed toward an answer.
Page 45 of 53
