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Exoplanets

Nearby Habitable-Zone Super-Earth GJ 3378 b Found to Be Smaller Than Previously Thought

Astronomers have significantly revised the properties of the nearby exoplanet GJ 3378 b after combining observations from four high-precision spectrographs. The updated analysis shows the planet is less than half as massive as previously estimated while remaining inside its star’s conservative habitable zone. Its lower mass makes it a stronger candidate for having a rocky composition and an important target for future direct imaging and atmospheric studies.

Ocean Worlds

Could Earth Have Seeded Europa’s Hidden Ocean With Life?

A theoretical study proposes that microscopic dust grains expelled from Earth could have carried bacteria to Jupiter’s moon Europa. The model estimates that a large number of potentially life-bearing particles may have reached Europa over tens of millions of years, although their transfer into the subsurface ocean remains unconfirmed.

Early Universe

Rare Galaxy Leak May Reveal How Early Universe Lit Up

Astronomers report LCEz4-M1, a candidate Lyman continuum emitter at redshift 4.444 in the Hubble Ultra Deep Field. Detected using VLT/MUSE, HST and JWST data, the galaxy may offer a rare direct view of how ionizing radiation escaped from early galaxies and helped shape cosmic reionization.

SETI

Stellar Winds May Be Hiding Narrowband Alien Signals

A new study suggests that turbulent plasma surrounding distant stars may broaden narrowband radio transmissions enough to evade conventional technosignature searches. Simulations indicate that the effect could be especially severe around M-dwarf stars and at lower radio frequencies, highlighting the need for search pipelines that examine a wider range of signal widths.

Microgravity Research

How Variable Gravity Could Change Flame Science in Space

A new perspective paper highlights variable gravity combustion as an emerging research frontier for spaceflight safety, rocket operations, and deep-space missions. The study explains why flames behave differently in microgravity, normal gravity, and supergravity, and why changing gravity conditions may create combustion effects that fixed-gravity experiments cannot fully predict.

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Microgravity Research

How Variable Gravity Could Change Flame Science in Space

Galaxies

JWST Finds Earliest Known Barred Spiral Galaxy

Astronomers report M1149-BSG-z5, a massive barred spiral galaxy seen at redshift 5.102, when the universe was about 1.1 billion years old. JWST and HST observations suggest the galaxy already had a stellar bar, spiral-arm structure, active star formation, and an AGN, challenging expectations for how early mature disk galaxies could form.