GJ 1061 d is a small world orbiting a faint star just 12.0 light-years from Earth. In cosmic terms, that makes it one of our closest known exoplanet neighbors — a planet beyond our own solar system. Yet “close” in space still means something almost too large to picture.
Where Exactly Is GJ 1061 d?
GJ 1061 d sits just 12.0 light-years away. To get a sense of that, think about our own solar system. The outermost known planet, Neptune, is less than one-thousandth of a light-year from the Sun. GJ 1061 d is 12,000 times farther away than that.
Even so, on the scale of the whole Milky Way galaxy — which stretches roughly 100,000 light-years across — 12.0 light-years is a tiny step. GJ 1061 d’s host star, GJ 1061, is among the nearest stars to our Sun. You can think of it as being in our own small corner of the galaxy, a close neighbor by stellar standards.
If you want to see where GJ 1061 sits compared to other nearby stars and worlds, the Cosmic Map shows our local corner of the galaxy in a way that is easy to explore.
What Does 12 Light-Years Actually Mean?
A light-year is the distance light travels in one year. Light moves at about 300,000 kilometers per second — the fastest speed in the universe as far as we know. In a single second, light could circle Earth more than seven times. In one year, it travels about 9.5 trillion kilometers.
So 12.0 light-years equals roughly 114 trillion kilometers. That number is hard to feel, so here is a comparison. If you shrank the solar system down so that the distance from Earth to the Sun was one centimeter, GJ 1061 would still be about 3 kilometers away on that same shrunken map. The stars are separated by enormous gulfs of empty space, even the close ones.
How Long Would It Take to Travel There?
Our fastest spacecraft so far have reached speeds of around 60,000 to 70,000 kilometers per hour. At that pace, reaching GJ 1061 d would take something in the range of tens of thousands of years. Scientists haven’t settled on a single mission design for a trip like that, and no spacecraft is currently headed that way.
Some researchers talk about future concepts — tiny laser-pushed probes, for example — that might one day reach a small fraction of the speed of light. Even at one-tenth the speed of light, a journey to GJ 1061 would take about 120 years. That is still longer than a human lifetime, and we are nowhere near that technology yet.
The honest truth is that 12 light-years, though close on a galactic map, is extraordinarily far by any standard we can build toward today. If you enjoy thinking through numbers like these, the Distance and Travel Time tool lets you explore how long trips to different stars would take at various speeds.
The Star GJ 1061 — A Dim, Cool Neighbor
GJ 1061 is what astronomers call a red dwarf — a star much smaller, cooler, and dimmer than our Sun. Its surface temperature is 2,953 K (kelvin is the unit scientists use to measure temperature; 2,953 K is about 2,680 degrees Celsius). For comparison, the Sun’s surface sits at around 5,778 K, so GJ 1061 runs nearly half as hot.
Red dwarfs are the most common type of star in the Milky Way, but they are too dim to see with the naked eye from Earth. GJ 1061 is no exception — you need a telescope to spot it. Because it gives off so much less energy than the Sun, a planet would need to orbit very close to GJ 1061 to receive enough warmth to potentially have liquid water.
Red dwarfs like GJ 1061 also tend to be active stars, producing flares — sudden bursts of radiation — that could affect any nearby planets. Scientists are still studying how much that matters for whether life could ever exist in such systems.
What We Know About GJ 1061 d
GJ 1061 d is slightly larger than Earth. Its radius — the distance from its center to its surface — is about 1.16 times Earth’s. Its mass, meaning how much matter it contains, is about 1.67 times Earth’s mass. That makes it what scientists call a super-Earth, a planet somewhat bigger and heavier than our own but still rocky in scale, as far as we can tell.
One year on GJ 1061 d lasts only 13.1 Earth days. That is how long the planet takes to complete one full orbit around its star. Because the star is so cool and dim, this short, close orbit places GJ 1061 d in the region where scientists think liquid water could exist — sometimes called the habitable zone. That does not mean the planet has oceans or life. We don’t know what its surface is like, whether it has an atmosphere (a layer of gases surrounding it), or what conditions there really are. Those are open questions scientists are working on.
A System of Three Worlds
GJ 1061 d is not alone. Astronomers have found three planets in the GJ 1061 system so far. GJ 1061 d is the outermost of the three known planets. The other two are also thought to be small, rocky worlds, though their details are not covered here. Having several planets packed into tight orbits around a dim red dwarf is something scientists see fairly often — it seems to be a common way for planetary systems to form around this type of star.
Whether any of the three planets have the right conditions for life is not something we can answer yet. Discovering multiple planets in a single nearby system gives researchers more to study and compare, which helps them understand how planets form and change over time.
How Scientists Found It
GJ 1061 d was discovered in 2020 using a method called radial velocity. Here is how it works. When a planet orbits a star, its gravity gives the star a tiny tug. That tug makes the star wobble very slightly — moving a little toward us, then a little away. When the star moves toward Earth, its light shifts slightly bluer. When it moves away, the light shifts slightly redder. Sensitive instruments can detect these tiny shifts and reveal that a planet is there, even when the planet itself is invisible.
Radial velocity doesn’t show scientists exactly what the planet looks like, but it does give a good estimate of the planet’s mass and how long its orbit takes. That is why we have solid mass and orbit data for GJ 1061 d, while other details — like what its surface or atmosphere might be like — are still unknown.
GJ 1061 d reminds us how much we can learn about a world we will likely never visit. Twelve light-years is an immense distance, but careful science has already told us this small planet exists, roughly how big it is, and where it sits around its cool, quiet star. There is still a great deal left to find out.