
NVS-03 navigation satellite set for mid-October 2026 launch after earlier failure
India's navigation constellation recovers from a costly satellite failure with a high-stakes launch that could restore its independent positioning system.
Astronomy and cosmology
Deep Field covers astronomy and cosmology. Telescopes and what they find, planets near and far, and the strange physics of the deep universe, traced back to the journal papers and observatory data behind the headlines.

India's navigation constellation recovers from a costly satellite failure with a high-stakes launch that could restore its independent positioning system.
Sep 22, 2026

Two space powers deepen ties on everything from solar storms to lunar missions, signaling a shift toward shared responsibility for Earth's orbital environment.
Sep 22, 2026

The Moon maintains a diffuse sodium tail that Earth crosses around each new moon, when our planet’s gravity focuses part of the stream into a spot visible to specialised cameras.
Sep 22, 2026

A visual search of ultra-deep VST mosaics found 47 dwarf-galaxy candidates where only four were catalogued, exposing both the power and the biases of by-eye discovery.
Sep 22, 2026

XRISM's iron-line spectrum directly measured plasma falling onto GX 301−2, while the disk-breakup and reversal sequence remains a model supported by spectra and Fermi timing.
Sep 21, 2026

TOI-1355 b's transit chord is moving off its rapidly rotating star. If the measured drift holds, the final grazing transit will occur around mid-2033.
Sep 21, 2026

Webb spectroscopy identifies a roughly two-Jupiter-mass IC 348 member with infrared excess from a disk, while spatial evidence favors star-like formation over planetary ejection.
Sep 20, 2026

A state-space analysis of 3,340 pulse-frequency measurements slightly favors a retrograde disk before 4U 1626−67's 2008 torque reversal, but a data gap and weak Bayesian odds keep the result indirect.
Sep 20, 2026

Two chemical tracers in carbonaceous iron meteorites indicate that the earliest outer Solar System planetesimals contained only 8 to 17 percent fine matrix, extending aerodynamic sorting to the opening era of planet formation.
Sep 20, 2026

JPL's measured gravity and radius put a surface-grazing Deimos orbit near 14.2 km/h and local escape near 20.1 km/h, although Mars and the moon's irregular shape complicate real flight.
Sep 19, 2026

Robert Wagner was checking image quality on a global map of the Moon when the halo appeared. The crater it marks, now named McGetchin, is 222 metres across and 43 metres deep, and a zone of ground seven kilometres across now runs 8 to 9 kelvin colder at night than the ground beyond it.
Sep 19, 2026

Cassini's only close look at tiny Methone found no crater larger than about 130 metres. Its smooth shape points to an extraordinarily porous moon whose surface cannot preserve relief easily.
Sep 19, 2026

Dawn's images, gravity data and mineral maps point to Ahuna Mons as a young cryovolcanic dome built by a viscous slurry of brine, salts, ice and solid particles.
Sep 19, 2026

Keck archive data confirm a still-growing planet in the 55-AU gap around Elias 2-24, but its 1.9-to-4.0-Jupiter-mass estimate remains model-dependent.
Sep 18, 2026

Loudoun County reports the world's highest concentration of data centres; Dominion says the cluster requires major transmission and generation investment to meet growing electricity demand.
Sep 18, 2026

FWS winter 2024–2025 estimate: 557 whooping cranes (95% CI 478.7–645.1) around Aransas, including at least 41 juveniles and 193 adult pairs — all descended from 14 adults on the Texas coast in 1941.
Sep 16, 2026