We know of thousands of planets beyond our solar system, and almost all of them are too far away to study in any detail. So a close one, sitting where liquid water could in principle exist, is worth stopping for.

In March 2026 the RedDots collaboration published exactly that: a super-Earth called GJ 887 d, circling a red dwarf a little under 10.7 light-years from the Sun. The team confirmed that the planet sits in the habitable zone, the second-closest such world after Proxima Centauri b.

We are not astrobiologists or planetary scientists, and nothing here is a claim that this world is habitable. This is our reading of one new paper and its context. The work rests on indirect measurements, and a planet in a star’s habitable zone is a candidate for study, not a confirmed home for anything.

What GJ 887 d actually is

The confirmation came from a fresh look at GJ 887, one of the brightest red dwarfs in the sky. The team added 101 new HARPS and 12 new ESPRESSO measurements to years of older data. These track the tiny wobble a planet’s gravity causes in its star. Together they pointed to a system of four planets. The headline world, planet d, circles the star every 50.77 days and weighs at least about 6.5 times as much as Earth.

That orbit lands it inside the star’s habitable zone, the band of distances where a planet receives roughly the right amount of starlight for liquid water at the surface. For GJ 887 that band runs from orbits of 43 to 122 days, and planet d receives about 81 percent of the sunlight Earth gets, placing it inside the zone, near its warmer inner edge.

Proxima b versus GJ 887 d

Distance is the obvious comparison, and Proxima Centauri b wins it. Proxima is the nearest star to the Sun at 4.24 light-years, less than half GJ 887’s distance, and its habitable-zone planet is roughly Earth-sized at about 1.27 Earth masses. On raw closeness and size, Proxima b is the more Earth-like-looking candidate.

But closeness is not the whole story of whether a planet can be studied, or whether it stands a chance of holding onto an atmosphere. That is where the two systems part ways, and it comes down to the stars they orbit.

Why the host star matters

Red dwarfs are prone to violent flares, and Proxima is a known offender. Meredith MacGregor, a co-author on flare studies of the star, put the contrast plainly. She noted that “Proxima Centauri’s flares are much more powerful, and we know it has rocky planets in the habitable zone.” Her team asked whether such flares chemically change or strip away the atmospheres of nearby planets. That is the long-running worry about Proxima b: it may sit too close to a temperamental star to keep an atmosphere.

GJ 887 looks calmer. The 2020 discovery team wrote that “our observations show that GJ 887 has photometric variability below 500 parts per million, which is unusually quiet for a red dwarf.” Even so, the star is not perfectly placid. The 2026 reanalysis included observations from a period when GJ 887 was more active, so “unusually quiet” describes its general behaviour rather than a guarantee of constant inactivity. A quieter star is easier to measure planets around, and in principle a gentler neighbor for any atmosphere. That combination, a quiet, nearby star with a planet near the habitable zone, is what makes the system a key target for future study.

The catch beneath the headline

Two caveats keep this a candidate rather than something to get carried away with.

First, that 6.5 Earth masses is a minimum. The wobble method only measures how a planet tugs its star along our line of sight, so it sets a floor; the real mass could be higher depending on the tilt of the orbit.

Second, and more important, no transit was seen, which means no size has been measured. Without a size there is no density, and without density we cannot say what the planet is made of. It could be rocky, a water world, or a small gas-rich planet. “Super-Earth” here is a label about mass, not a promise of a rocky surface.

“Habitable zone” is also a modest claim on its own. It marks where a planet gets roughly Earth-like warmth from its star, and says nothing about whether the planet has an atmosphere, water, or anything living. It tells us where to point future instruments, not what we will find.

What could actually study it up close

Proximity matters so much because the closest, brightest targets are the only ones the next generation of instruments has a realistic shot at studying directly. GJ 887 d is on the wish list for missions like the Habitable Worlds Observatory (HWO) and the LIFE concept, which aim to image nearby worlds and read their light. The paper allows itself one hopeful line: because the planet is bright and close, the authors write that studying its atmosphere might be possible in the coming decades with space-based imaging missions.

A future telescope might just barely separate it from the glare of its star, or it might not. That is not settled, and the paper does not pretend otherwise.

Our read is that GJ 887 d earns its attention less for what we know about it and more for the rare combination it offers: a nearby, bright, mostly calm star with a planet parked in the right temperature band. That is an unusually clean test case, the sort of system the next decade of instruments was built to probe. Whether it turns out to have an atmosphere worth reading is genuinely unknown. What proximity buys is a chance to ask the question at all, and for a habitable-zone world, being second only to Proxima b puts it near the front of a very short line.