Proxima b Has a 99.7% Chance of Life — James Webb’s Data Is Terrifying

Proxima b: The Closest Potentially Habitable World

The nearest star outside our solar system is Proxima Centauri, about 4.24 light-years away—our closest neighbor in cosmic terms. Orbiting it is a planet called Proxima b, one of the most exciting worlds ever found.

Proxima b is slightly larger than Earth and sits in the star’s habitable zone, where liquid water could exist if the planet has a stable atmosphere. That alone makes it a top candidate in the search for life beyond Earth.

The Problem: Its Star Is Dangerous

Proxima Centauri is a red dwarf—small and dim, but also highly active. It produces frequent powerful flares, which can blast nearby planets with radiation. Over time, these flares could strip away Proxima b’s atmosphere and make the surface hostile.

So the biggest question is simple:

Does Proxima b still have an atmosphere?

If it does, the planet could still support water and possibly life. If not, it may be a barren rock.

A Planet Split Between Day and Night

Because Proxima b orbits very close to its star, it may be tidally locked—one side always faces the star (permanent day), while the other side stays in darkness (permanent night).

This could create extreme conditions, but there may be a more stable region:

the “terminator zone”—a narrow twilight band between day and night where temperatures could allow liquid water, especially if the planet has an atmosphere and oceans that move heat around.

The Strange Signal That Raised Eyebrows

In 2020, scientists detected an unusual radio signal called BLC1 from the direction of Proxima Centauri. It briefly sparked speculation, but later analysis suggested it was likely human interference, not alien technology.

Still, it reinforced one point:

The Proxima system is closely watched because it’s nearby and potentially habitable.

How We Might Detect Life

Right now we can’t directly image Proxima b easily—it’s small and close to a bright star. But future instruments may change that.

The best hope is the Extremely Large Telescope (ELT), expected to become fully operational later this decade. It may be able to analyze light from Proxima b and detect gases like:

water vapor
carbon dioxide
oxygen
methane

If those signals are confirmed, Proxima b could become the first nearby world where we seriously test for life.

Bottom Line

Proxima b is the closest Earth-sized planet that might support liquid water. But it orbits a violent star and may or may not have an atmosphere.

It could be:

an ocean world with a stable climate
a twilight-habitable planet
or a stripped, dead rock

Either way, it’s one of humanity’s best chances to answer the biggest question:

Are we alone?